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- Chatoyancy abstract "In gemology, chatoyancy (/ʃəˈtɔɪ.ənsi/ shə-TOY-ən-see), or chatoyance or cat's eye effect, is an optical reflectance effect seen in certain gemstones. Coined from the French \"œil de chat,\" meaning \"cat's eye,\" chatoyancy arises either from the fibrous structure of a material, as in tiger's eye quartz, or from fibrous inclusions or cavities within the stone, as in cat's eye chrysoberyl. The precipitates that cause chatoyance in chrysoberyl are the mineral rutile, composed mostly of titanium dioxide. Examined samples have yielded no evidence of tubes or fibres. The rutile precipitates all align perpendicularly with respect to cat's eye effect. It is reasoned that the lattice parameter of the rutile matches only one of the three orthorhombic crystal axes of the chrysoberyl, resulting in preferred alignment along that direction. The effect can be likened to the sheen off a spool of silk: The luminous streak of reflected light is always perpendicular to the direction of the fibres. For a gemstone to show this effect best it must be cut en cabochon, with the fibers or fibrous structures parallel to the base of the finished gem. The best finished specimens show a single sharply defined band of light that moves across the stone when it is rotated. Chatoyant stones of lesser quality display a banded effect as is typical with cat's-eye varieties of quartz. Faceted stones do not show the effect well. Gem species known for this phenomenon include the aforementioned quartz, chrysoberyl, beryl (especially var. aquamarine), charoite, tourmaline, labradorite, selenite, feldspar, apatite, moonstone, thomsonite and scapolite amongst others. Glass optical cable can also display chatoyancy if properly cut, and has become a popular decorative material in a variety of vivid colors.The term \"cat's eye\", when used by itself as the name of a gemstone, refers to a cat's eye chrysoberyl. It is also used as an adjective which indicates the chatoyance phenomenon in another stone, e.g., cat's eye aquamarine.".
- Chatoyancy thumbnail Tigers-Eye.jpg?width=300.
- Chatoyancy wikiPageID "387491".
- Chatoyancy wikiPageLength "4640".
- Chatoyancy wikiPageOutDegree "29".
- Chatoyancy wikiPageRevisionID "694127633".
- Chatoyancy wikiPageWikiLink Apatite.
- Chatoyancy wikiPageWikiLink Asterism_(gemology).
- Chatoyancy wikiPageWikiLink Beryl.
- Chatoyancy wikiPageWikiLink Cabochon.
- Chatoyancy wikiPageWikiLink Category:Mineralogy.
- Chatoyancy wikiPageWikiLink Category:Optical_phenomena.
- Chatoyancy wikiPageWikiLink Charoite.
- Chatoyancy wikiPageWikiLink Chrysoberyl.
- Chatoyancy wikiPageWikiLink Gemology.
- Chatoyancy wikiPageWikiLink Gemstone.
- Chatoyancy wikiPageWikiLink Moonstone_(gemstone).
- Chatoyancy wikiPageWikiLink Optical_phenomena.
- Chatoyancy wikiPageWikiLink Optics.
- Chatoyancy wikiPageWikiLink Quartz.
- Chatoyancy wikiPageWikiLink Rutile.
- Chatoyancy wikiPageWikiLink Scapolite.
- Chatoyancy wikiPageWikiLink Thomsonite.
- Chatoyancy wikiPageWikiLink Tigers_eye.
- Chatoyancy wikiPageWikiLink Titanium_dioxide.
- Chatoyancy wikiPageWikiLink Tourmaline.
- Chatoyancy wikiPageWikiLink Wood_grain.
- Chatoyancy wikiPageWikiLink Woodworking.
- Chatoyancy wikiPageWikiLink File:Quartz_cats-eye_cropped.jpg.
- Chatoyancy wikiPageWikiLink File:Tigers-Eye.jpg.
- Chatoyancy wikiPageWikiLink File:Tigers_eye_crystal444.jpg.
- Chatoyancy wikiPageWikiLinkText "Chatoyancy".
- Chatoyancy wikiPageWikiLinkText "Chatoyant".
- Chatoyancy wikiPageWikiLinkText "cat's eye".
- Chatoyancy wikiPageWikiLinkText "chatoyance".
- Chatoyancy wikiPageWikiLinkText "chatoyancy".
- Chatoyancy wikiPageWikiLinkText "chatoyant effect".
- Chatoyancy wikiPageWikiLinkText "chatoyant".
- Chatoyancy wikiPageUsesTemplate Template:!.
- Chatoyancy wikiPageUsesTemplate Template:Citation_needed.
- Chatoyancy wikiPageUsesTemplate Template:IPAc-en.
- Chatoyancy wikiPageUsesTemplate Template:Redirect.
- Chatoyancy wikiPageUsesTemplate Template:Refbegin.
- Chatoyancy wikiPageUsesTemplate Template:Refend.
- Chatoyancy wikiPageUsesTemplate Template:Reflist.
- Chatoyancy wikiPageUsesTemplate Template:Respell.
- Chatoyancy subject Category:Mineralogy.
- Chatoyancy subject Category:Optical_phenomena.
- Chatoyancy hypernym Effect.
- Chatoyancy type Colour.
- Chatoyancy type Disease.
- Chatoyancy type Subfield.
- Chatoyancy comment "In gemology, chatoyancy (/ʃəˈtɔɪ.ənsi/ shə-TOY-ən-see), or chatoyance or cat's eye effect, is an optical reflectance effect seen in certain gemstones. Coined from the French \"œil de chat,\" meaning \"cat's eye,\" chatoyancy arises either from the fibrous structure of a material, as in tiger's eye quartz, or from fibrous inclusions or cavities within the stone, as in cat's eye chrysoberyl.".
- Chatoyancy label "Chatoyancy".
- Chatoyancy sameAs Q1068275.
- Chatoyancy sameAs عين_الهر_(حجر).
- Chatoyancy sameAs Chatoyance.
- Chatoyancy sameAs Kat-okuleco.
- Chatoyancy sameAs תופעת_עין_החתול.
- Chatoyancy sameAs Gatteggiamento.
- Chatoyancy sameAs キャッツアイ効果.
- Chatoyancy sameAs Chatoyance-effect.
- Chatoyancy sameAs Chatoyans.
- Chatoyancy sameAs Efekt_kociego_oka.
- Chatoyancy sameAs m.022d1t.
- Chatoyancy sameAs Кошачий_глаз_(камень).
- Chatoyancy sameAs Kattögoneffekt.
- Chatoyancy sameAs ชะทอยยันซี.
- Chatoyancy sameAs Полиск_мінералів.
- Chatoyancy sameAs Q1068275.
- Chatoyancy wasDerivedFrom Chatoyancy?oldid=694127633.
- Chatoyancy depiction Tigers-Eye.jpg.
- Chatoyancy isPrimaryTopicOf Chatoyancy.