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{{about|the fortune telling object}} |
{{about|the fortune telling object}} |
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{{For|the Wikipedia editing policy about future events|WP:CRYSTALBALL}} |
{{For|the Wikipedia editing policy about future events|WP:CRYSTALBALL}} |
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{{For |
{{For|the American commentator|Krystal Ball}} |
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[[Image:John William Waterhouse - The Crystal Ball.JPG|thumb|''[[The Crystal Ball (painting)|The Crystal Ball]]'' by [[John William Waterhouse]] (1902)]] |
[[Image:John William Waterhouse - The Crystal Ball.JPG|thumb|''[[The Crystal Ball (painting)|The Crystal Ball]]'' by [[John William Waterhouse]] (1902)]] |
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A '''crystal ball''' is a [[crystal]] or [[glass]] ball commonly used in [[fortune-telling]]. It is generally associated with the performance of [[clairvoyance]] and [[scrying]] |
A '''crystal ball''' is a [[crystal]] or [[glass]] ball commonly used in [[fortune-telling]]. It is generally associated with the performance of [[clairvoyance]] and [[scrying]]. Used since [[Late antiquity|Antiquity]], crystal balls have had a broad reputation with [[witchcraft]], including modern times with [[charlatan]] acts and amusements at [[circus]] venues, [[festival]]s, etc. Other names for the thing include '''crystal sphere''', '''orbuculum''', '''scrying ball''', '''shew/show(ing) stone''', and more variants by [[dialect]]. |
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==History== |
==History== |
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{{expand section|date=August 2024}} |
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By the fifth century |
By the fifth century AD, scrying using crystal balls was widespread within the [[Roman Empire]] and was condemned by the [[Chalcedonian Christianity|early Christian Church]] as [[Christian views on magic|heretical]] (magic had been condemned since the [[Apostolic Era]] with e.g. Chapter 2 of the [[Didache]]).<ref name=EB>{{cite encyclopedia |title=Crystal gazing |encyclopedia=[[Encyclopædia Britannica]] |url=https://www.britannica.com/topic/crystal-gazing |access-date=6 November 2015}}</ref><ref name="earlychristianwritings">{{cite web | last = Roberts| first = Alexander| author-link = Alexander Roberts (scholar)| title = The Didache| website = Early Christian Writings| publisher = Peter Kirby| date = 1886| url = https://www.earlychristianwritings.com/text/didache-roberts.html| access-date = 2024-08-07}}</ref> |
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The tomb of [[Childeric I]], a fifth-century king of the [[Franks]], contained a 3.8 |
The tomb of [[Childeric I]], a fifth-century king of the [[Franks]], contained a 3.8 cm (1½ inch) diameter transparent [[beryl]] globe.<ref>Besterman, 1995, pg. 45</ref> The object is similar to other globes that were later found in tombs from the [[Merovingian]] period in [[Gaul]] and the [[Anglo-Saxons|Saxon period]] in [[England]]. Some of these were complete with a frame suggesting an ornamental object.<ref name="Besterman, 1995, pg. 46">Besterman, 1995, pg. 46</ref> It has been pointed out that these mounts are identical to those of later globes also believed to be used for magic or divination, indicating that these crystal globes may have been used for {{Wikt-lang|en|crystallomancy}}.<ref name="Besterman, 1995, pg. 46"/><ref>{{Cite book|language=en|author=George Frederick Kunz|title=The Curious Lore of Precious Stones |page=182 |url=https://archive.org/details/curiousloreprec00kunzgoog |location=Philadelphia|publisher=Lippincott|year=1913|isbn=978-0-486-22227-1 }}</ref> |
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[[John Dee (mathematician)|John Dee]] was a noted British mathematician, astronomer, astrologer, geographer, and consultant to [[Queen Elizabeth I]]. He devoted much of his life to alchemy, divination, and [[Hermeticism|Hermetic]] philosophy, of which the use of crystal balls was often included.<ref>{{cite web |title=John Dee's crystal ball |department=TT Research Projects |url=http://ensemble.va.com.au/tableau/suzy/TT_ResearchProjects/Hexen2039/JohnDee/JD_CBall.html |archive-url=https://web.archive.org/web/20230315132818/http://ensemble.va.com.au/tableau/suzy/TT_ResearchProjects/Hexen2039/JohnDee/JD_CBall.html|archive-date=2023-03-15|access-date=2023-06-06 |via=ensemble.va.com.au}}</ref> |
[[John Dee (mathematician)|John Dee]] was a noted British mathematician, astronomer, astrologer, geographer, and consultant to [[Queen Elizabeth I]]. He devoted much of his life to alchemy, divination, and [[Hermeticism|Hermetic]] philosophy, of which the use of crystal balls was often included.<ref>{{cite web |title=John Dee's crystal ball |department=TT Research Projects |url=http://ensemble.va.com.au/tableau/suzy/TT_ResearchProjects/Hexen2039/JohnDee/JD_CBall.html |archive-url=https://web.archive.org/web/20230315132818/http://ensemble.va.com.au/tableau/suzy/TT_ResearchProjects/Hexen2039/JohnDee/JD_CBall.html|archive-date=2023-03-15|access-date=2023-06-06 |via=ensemble.va.com.au}}</ref> |
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Crystal gazing was a popular pastime in the [[Victorian era]], and was claimed to work best when the Sun is at its northernmost declination. Immediately before the appearance of a vision, the ball was said to mist up from within.<ref name=EB/> |
[[Crystal]] gazing was a popular pastime in the [[Victorian era]], and was claimed to work best when the [[Sun]] is at its northernmost declination. Immediately before the appearance of a vision, the ball was said to mist up from within.<ref name=EB/> |
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The use of crystal balls for divination also has a long history with the [[Romani people|Romani]] people.<ref>{{cite web |title=Where did crystal balls come from? |date=May 21, 2019 |website=History Daily (historydaily.org) |url=https://historydaily.org/crystal-balls-history-origin}}</ref> Fortune tellers, known as drabardi,<ref>{{cite web |title=Fortune telling as part of the Roma Culture |series=Правозахисний фонд "Розвиток" [Human Rights Fund "Development"] |website=rozvitok.org |url=https://rozvitok.org/en/fortune-telling-as-part-of-the-roma-culture/ |access-date=2023-05-07 | |
The use of crystal balls for divination also has a long history with the [[Romani people|Romani]] people.<ref>{{cite web |title=Where did crystal balls come from? |date=May 21, 2019 |website=History Daily (historydaily.org) |url=https://historydaily.org/crystal-balls-history-origin}}</ref> Fortune tellers, known as ''drabardi'',<ref>{{cite web |title=Fortune telling as part of the Roma Culture |series=Правозахисний фонд "Розвиток" [Human Rights Fund "Development"] |website=rozvitok.org |url=https://rozvitok.org/en/fortune-telling-as-part-of-the-roma-culture/ |access-date=2023-05-07 |language=en-US}}</ref> traditionally use crystal balls as well as cards to seek knowledge about future events.<ref>{{cite web |title=ЦЫГАНЕ И ЦЫГАНСКИЕ ГАДАНИЯ |language=ru |trans-title=Gypsies and gypsy fortune-telling |website=sekukin.narod.ru |url=http://sekukin.narod.ru/templ14.html |access-date=2023-05-07}}</ref> |
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==Art of scrying== |
==Art of scrying== |
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[[File:A crystal ball at work.jpg|thumb|upright|right|A [[quartz]] crystal ball of the type commonly used for [[divination]] or [[scrying]]]] |
[[File:A crystal ball at work.jpg|thumb|upright|right|A [[quartz]] crystal ball of the type commonly used for [[divination]] or [[scrying]]]] |
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The process of [[scrying]] often involves the use of crystals, especially crystal balls, in an attempt to predict the future or otherwise divine hidden information.<ref>{{cite |
The process of [[scrying]] often involves the use of crystals, especially crystal balls, in an attempt to predict the future or otherwise divine hidden information.<ref>{{cite encyclopedia |title=scry |type=definition |dictionary=dictionary.com |lang=en |url=https://www.dictionary.com/browse/scry |access-date=2023-05-07}}</ref> Crystal ball scrying is commonly used to seek supernatural guidance while making difficult decisions in one's life (e.g., matters of love or finances).<ref>{{cite book |author=Chauran, Alexandra |year=2011 |title=Crystal Ball Reading for Beginners: A down to Earth guide |place=Woodbury, MN |publisher=Llewellyn Publications}}</ref><ref name=lensball-australia>{{cite web |title=Lensball photography |website=lensball.com.au |url=https://lensball.com.au |access-date=4 March 2019}}</ref> |
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When the technique of scrying is used with crystals, or any transparent body, it is known as crystallomancy or [[crystal gazing]]. |
When the technique of scrying is used with crystals, or any transparent body, it is known as crystallomancy or [[crystal gazing]]. |
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{{Main|Ball lens}} |
{{Main|Ball lens}} |
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Optically, a crystal ball is a [[ball lens]]. For typical materials such as [[quartz]] and glass, it forms an image of distant objects slightly beyond the surface of the sphere, on the opposite side. Unlike conventional lenses, the image-forming properties are omnidirectional (independent of the direction being imaged) |
Optically, a crystal ball is a [[ball lens]]. For typical materials such as [[quartz]] and glass, it forms an image of distant objects slightly beyond the surface of the sphere, on the opposite side. Unlike conventional lenses, the image-forming properties are omnidirectional (independent of the direction being imaged) |
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[[Image:Hanstholm Fyr - The crystal ball (10).jpg|thumb|[[Hanstholm]] lighthouse in Denmark through lens ball]] |
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This omnidirectional focusing can cause a crystal ball to act as a [[burning glass]] when it is brought into full sunlight. The image of the sun formed by a large crystal ball will burn a hand that is holding it, and can ignite dark-coloured flammable material placed near it.<ref>{{cite news |title=Crystal ball starts fire at Okla. home |agency=[[Associated Press]] |date=29 January 2004 |newspaper=[[The Washington Post]] |url=https://www.washingtonpost.com/wp-dyn/articles/A61176-2004Jan29.html |access-date=22 December 2012}}</ref> |
This omnidirectional focusing can cause a crystal ball to act as a [[burning glass]] when it is brought into full sunlight. The image of the sun formed by a large crystal ball will burn a hand that is holding it, and can ignite dark-coloured flammable material placed near it.<ref>{{cite news |title=Crystal ball starts fire at Okla. home |agency=[[Associated Press]] |date=29 January 2004 |newspaper=[[The Washington Post]] |url=https://www.washingtonpost.com/wp-dyn/articles/A61176-2004Jan29.html |access-date=22 December 2012}}</ref> |
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[[Image:Quartz crystal.jpg|thumb|The largest flawless quartz sphere is in the [[National Museum of Natural History]], [[Washington D.C.]]]] |
[[Image:Quartz crystal.jpg|thumb|The largest flawless quartz sphere is in the [[National Museum of Natural History]], [[Washington D.C.]]]] |
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A crystal ball was among the grave-goods of the [[Merovingian]] King, [[Childeric I]] ({{circa|437–481 AD}}).<ref>{{cite book |last=Chifflet |first=J.-J. |author-link=Jean-Jacques Chifflet |year=1665 |title=Anastasis Childerici I. Francorum Regis, site Thesaurus sepulchralis Tornaci Neruiorum effossus, & commentario illustratus | |
A crystal ball was among the grave-goods of the [[Merovingian]] King, [[Childeric I]] ({{circa|437–481 AD}}).<ref>{{cite book |last=Chifflet |first=J.-J. |author-link=Jean-Jacques Chifflet |year=1665 |title=Anastasis Childerici I. Francorum Regis, site Thesaurus sepulchralis Tornaci Neruiorum effossus, & commentario illustratus |language=la |trans-title=Raising up of Childeric I, King of the Franks, {{grey|[his grave-]}}site excavated sepulchral treasure of Tournai {{grey|[in Belgium]}}, & illustrated commentary |url=https://archive.org/details/anastasischilder00chif/page/242/mode/2up}}</ref> The grave-goods were discovered in 1653. In 1831, they were stolen from the royal library in France where they were being kept. Few items were ever recovered. The crystal ball was not among them. |
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The [[Honours of Scotland|Sceptre of Scotland]] has a crystal ball in its finial, honoring the tradition of their use by pagan druids.<ref name=Ferguson2005>{{cite book |author=Ferguson, Sibyl |date=30 June 2005 |title=Crystal Ball: Stones, amulets, and talismans for power, protection, and prophecy |publisher=Weiser Books |isbn=978-1-57863-348-7 |pages=29–30 |url=https://books.google.com/books?id=4V0x3_K98_wC&pg=PA29 |via=Google Books}}</ref> It was made in Italy in the 15th century, and was a gift to [[James IV of Scotland|James IV]] from [[Pope Alexander VI]]. |
The [[Honours of Scotland|Sceptre of Scotland]] has a crystal ball in its finial, honoring the tradition of their use by pagan druids.<ref name=Ferguson2005>{{cite book |author=Ferguson, Sibyl |date=30 June 2005 |title=Crystal Ball: Stones, amulets, and talismans for power, protection, and prophecy |publisher=Weiser Books |isbn=978-1-57863-348-7 |pages=29–30 |url=https://books.google.com/books?id=4V0x3_K98_wC&pg=PA29 |via=Google Books}}</ref> It was made in Italy in the 15th century, and was a gift to [[James IV of Scotland|James IV]] from [[Pope Alexander VI]]. |
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The [[Penn Museum]] in [[Philadelphia]] displays the third-largest crystal ball as the central object in its Chinese [[Rotunda (architecture)|Rotunda]].<ref>{{cite web |title=Crystal sphere |id=335728 |series=[[University of Pennsylvania Museum of Archaeology and Anthropology]] |publisher=[[University of Pennsylvania]] |place=Philadelphia, PA |url=http://www.penn.museum/collections/object/335728 |access-date=21 September 2014}}</ref> Weighing {{convert|49|lb|kg}}, the [[sphere]] is made of [[quartz crystal]] from [[Burma]] and was shaped through years of constant rotation in a semi-cylindrical container filled with [[emery (rock)|emery]], [[Garnet|garnet powder]], and [[water]]. The ornamental treasure was purportedly made for the [[Empress Dowager Cixi]] (1835–1908) during the [[Qing dynasty]] in the 19th century, but no evidence as to its actual origins exists. The crystal ball and an [[ancient Egypt]]ian statuette<ref>{{cite web |title=Statue |id=276512 |series=[[University of Pennsylvania Museum of Archaeology and Anthropology]] |publisher=[[University of Pennsylvania]] |place=Philadelphia, PA |url=http://www.penn.museum/collections/object/276512 |access-date=21 September 2014}}</ref> which depicted the [[ancient Egyptian deities|god]] [[Osiris]] were stolen in 1988.<ref>{{cite news |title=Penn Museum crystal ball, statue stolen; guard ignored burglar alarms |date=1988-11-12 |df=dmy-all |website=Philly.com |url=http://articles.philly.com/1988-11-12/news/26248970_1_crystal-ball-alarms-security-guard |access-date=21 September 2014}}</ref> They were recovered three years later with no damage done to either object. |
The [[Penn Museum]] in [[Philadelphia]] displays the third-largest crystal ball as the central object in its Chinese [[Rotunda (architecture)|Rotunda]].<ref>{{cite web |title=Crystal sphere |id=335728 |series=[[University of Pennsylvania Museum of Archaeology and Anthropology]] |publisher=[[University of Pennsylvania]] |place=Philadelphia, PA |url=http://www.penn.museum/collections/object/335728 |access-date=21 September 2014}}</ref> Weighing {{convert|49|lb|kg}}, the [[sphere]] is made of [[quartz crystal]] from [[Burma]] and was shaped through years of constant rotation in a semi-cylindrical container filled with [[emery (rock)|emery]], [[Garnet|garnet powder]], and [[water]]. The ornamental treasure was purportedly made for the [[Empress Dowager Cixi]] (1835–1908) during the [[Qing dynasty]] in the 19th century, but no evidence as to its actual origins exists. The crystal ball and an [[ancient Egypt]]ian statuette<ref>{{cite web |title=Statue |id=276512 |series=[[University of Pennsylvania Museum of Archaeology and Anthropology]] |publisher=[[University of Pennsylvania]] |place=Philadelphia, PA |url=http://www.penn.museum/collections/object/276512 |access-date=21 September 2014}}</ref> which depicted the [[ancient Egyptian deities|god]] [[Osiris]] were stolen in 1988.<ref>{{cite news |title=Penn Museum crystal ball, statue stolen; guard ignored burglar alarms |date=1988-11-12 |df=dmy-all |website=Philly.com |url=http://articles.philly.com/1988-11-12/news/26248970_1_crystal-ball-alarms-security-guard |archive-url=https://web.archive.org/web/20140329012537/http://articles.philly.com/1988-11-12/news/26248970_1_crystal-ball-alarms-security-guard |url-status=dead |archive-date=March 29, 2014 |access-date=21 September 2014}}</ref> They were recovered three years later with no damage done to either object. |
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==See also== |
==See also== |
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{{Authority control}} |
{{Authority control}} |
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{{Witchcraft}} |
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{{DEFAULTSORT:Crystal Ball}} |
{{DEFAULTSORT:Crystal Ball}} |
Latest revision as of 05:16, 12 November 2024
A crystal ball is a crystal or glass ball commonly used in fortune-telling. It is generally associated with the performance of clairvoyance and scrying. Used since Antiquity, crystal balls have had a broad reputation with witchcraft, including modern times with charlatan acts and amusements at circus venues, festivals, etc. Other names for the thing include crystal sphere, orbuculum, scrying ball, shew/show(ing) stone, and more variants by dialect.
History
[edit]This section needs expansion. You can help by adding to it. (August 2024) |
By the fifth century AD, scrying using crystal balls was widespread within the Roman Empire and was condemned by the early Christian Church as heretical (magic had been condemned since the Apostolic Era with e.g. Chapter 2 of the Didache).[1][2]
The tomb of Childeric I, a fifth-century king of the Franks, contained a 3.8 cm (1½ inch) diameter transparent beryl globe.[3] The object is similar to other globes that were later found in tombs from the Merovingian period in Gaul and the Saxon period in England. Some of these were complete with a frame suggesting an ornamental object.[4] It has been pointed out that these mounts are identical to those of later globes also believed to be used for magic or divination, indicating that these crystal globes may have been used for crystallomancy.[4][5]
John Dee was a noted British mathematician, astronomer, astrologer, geographer, and consultant to Queen Elizabeth I. He devoted much of his life to alchemy, divination, and Hermetic philosophy, of which the use of crystal balls was often included.[6]
Crystal gazing was a popular pastime in the Victorian era, and was claimed to work best when the Sun is at its northernmost declination. Immediately before the appearance of a vision, the ball was said to mist up from within.[1]
The use of crystal balls for divination also has a long history with the Romani people.[7] Fortune tellers, known as drabardi,[8] traditionally use crystal balls as well as cards to seek knowledge about future events.[9]
Art of scrying
[edit]The process of scrying often involves the use of crystals, especially crystal balls, in an attempt to predict the future or otherwise divine hidden information.[10] Crystal ball scrying is commonly used to seek supernatural guidance while making difficult decisions in one's life (e.g., matters of love or finances).[11][12]
When the technique of scrying is used with crystals, or any transparent body, it is known as crystallomancy or crystal gazing.
In stage magic
[edit]Crystal balls are popular props used in mentalism acts by stage magicians. Such routines, in which the performer answers audience questions by means of various ruses, are known as crystal gazing acts. One of the most famous performers of the 20th century, Claude Alexander, was often billed as "Alexander the Crystal Seer".[13]
Optics
[edit]Optically, a crystal ball is a ball lens. For typical materials such as quartz and glass, it forms an image of distant objects slightly beyond the surface of the sphere, on the opposite side. Unlike conventional lenses, the image-forming properties are omnidirectional (independent of the direction being imaged)
This omnidirectional focusing can cause a crystal ball to act as a burning glass when it is brought into full sunlight. The image of the sun formed by a large crystal ball will burn a hand that is holding it, and can ignite dark-coloured flammable material placed near it.[14]
Famous crystal balls
[edit]A crystal ball was among the grave-goods of the Merovingian King, Childeric I (c. 437–481 AD).[15] The grave-goods were discovered in 1653. In 1831, they were stolen from the royal library in France where they were being kept. Few items were ever recovered. The crystal ball was not among them.
The Sceptre of Scotland has a crystal ball in its finial, honoring the tradition of their use by pagan druids.[16] It was made in Italy in the 15th century, and was a gift to James IV from Pope Alexander VI.
The Penn Museum in Philadelphia displays the third-largest crystal ball as the central object in its Chinese Rotunda.[17] Weighing 49 pounds (22 kg), the sphere is made of quartz crystal from Burma and was shaped through years of constant rotation in a semi-cylindrical container filled with emery, garnet powder, and water. The ornamental treasure was purportedly made for the Empress Dowager Cixi (1835–1908) during the Qing dynasty in the 19th century, but no evidence as to its actual origins exists. The crystal ball and an ancient Egyptian statuette[18] which depicted the god Osiris were stolen in 1988.[19] They were recovered three years later with no damage done to either object.
See also
[edit]- Crystal skull
- Gazing ball
- Magic Mirror (Snow White)
- Palantír
- Salvator Mundi (Leonardo), da Vinci's "Savior of the World" painting depicting Christ holding a crystal ball
- Seer stone (Latter Day Saints)
References
[edit]- ^ a b "Crystal gazing". Encyclopædia Britannica. Retrieved 6 November 2015.
- ^ Roberts, Alexander (1886). "The Didache". Early Christian Writings. Peter Kirby. Retrieved 2024-08-07.
- ^ Besterman, 1995, pg. 45
- ^ a b Besterman, 1995, pg. 46
- ^ George Frederick Kunz (1913). The Curious Lore of Precious Stones. Philadelphia: Lippincott. p. 182. ISBN 978-0-486-22227-1.
- ^ "John Dee's crystal ball". TT Research Projects. Archived from the original on 2023-03-15. Retrieved 2023-06-06 – via ensemble.va.com.au.
- ^ "Where did crystal balls come from?". History Daily (historydaily.org). May 21, 2019.
- ^ "Fortune telling as part of the Roma Culture". rozvitok.org. Правозахисний фонд "Розвиток" [Human Rights Fund "Development"]. Retrieved 2023-05-07.
- ^ "ЦЫГАНЕ И ЦЫГАНСКИЕ ГАДАНИЯ" [Gypsies and gypsy fortune-telling]. sekukin.narod.ru (in Russian). Retrieved 2023-05-07.
- ^ "scry". dictionary.com (definition). Retrieved 2023-05-07.
- ^ Chauran, Alexandra (2011). Crystal Ball Reading for Beginners: A down to Earth guide. Woodbury, MN: Llewellyn Publications.
- ^ "Lensball photography". lensball.com.au. Retrieved 4 March 2019.
- ^ Copperfield, David; Wiseman, Richard; Britland, David (2021). David Copperfield's History of Magic. Liwag, Homer (photographer) (1st ed.). New York, NY: Simon & Schuster. ISBN 978-1-9821-1291-2. OCLC 1236259508.
- ^ "Crystal ball starts fire at Okla. home". The Washington Post. Associated Press. 29 January 2004. Retrieved 22 December 2012.
- ^ Chifflet, J.-J. (1665). Anastasis Childerici I. Francorum Regis, site Thesaurus sepulchralis Tornaci Neruiorum effossus, & commentario illustratus [Raising up of Childeric I, King of the Franks, [his grave-]site excavated sepulchral treasure of Tournai [in Belgium], & illustrated commentary] (in Latin).
- ^ Ferguson, Sibyl (30 June 2005). Crystal Ball: Stones, amulets, and talismans for power, protection, and prophecy. Weiser Books. pp. 29–30. ISBN 978-1-57863-348-7 – via Google Books.
- ^ "Crystal sphere". University of Pennsylvania Museum of Archaeology and Anthropology. Philadelphia, PA: University of Pennsylvania. 335728. Retrieved 21 September 2014.
- ^ "Statue". University of Pennsylvania Museum of Archaeology and Anthropology. Philadelphia, PA: University of Pennsylvania. 276512. Retrieved 21 September 2014.
- ^ "Penn Museum crystal ball, statue stolen; guard ignored burglar alarms". Philly.com. 12 November 1988. Archived from the original on 29 March 2014. Retrieved 21 September 2014.
Further reading
[edit]- Lang, Andrew (1900). "Chapter V Crystal visions, savage and civilised". The Making of Religion. London, UK / New York, NY / Bombay, IN: Longmans, Green, and Co. pp. 83–104.
- Ferguson, Sibyl (1980). The Crystal Ball. Red Wheel/Weiser. ISBN 0-87728-483-0.
- Besterman, Theodore (1995). Crystal Gazing: A Study in the History, Distribution, Theory and Practice of Scrying. Kessinger Publishing. ISBN 1-56459-542-0.
- George Frederick Kunz (1913). "Chapter VI Crystal balls and Crystal Gazing". The Curious Lore of Precious Stones. Philadelphia: Lippincott. pp. 176–225. ISBN 0-48622-227-6.
External links
[edit]- Media related to crystal balls at Wikimedia Commons
- The dictionary definition of crystal ball at Wiktionary