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cut, characterized by a rounded, flat base rather than facets, with the fibrous structures aligned parallel to the base. High-quality specimens display a single, sharply defined band of light that moves across the stone when rotated, while lower-quality stones may show a banded effect similar to
214:. These rutile precipitates align perpendicularly, contributing to the cat's eye effect. This alignment is attributed to the rutile's lattice parameter, which matches only one of the three orthorhombic crystal axes of chrysoberyl, leading to its preferred orientation in that direction.
354:. This ‘figure’, which has a striking three-dimensional appearance, is highly prized by woodworkers and their clients alike, and is featured regularly in furniture, musical instruments, and other decorative wood products. Figuring takes on a variety of forms and is referred to as
85:
183:, meaning 'cat's eye'. The chatoyant effect is typically characterized by one or more well-defined bands of reflected light, reminiscent of a cat's eye, which appear to glide across the material's surface as the chatoyant object or observer shifts position.
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No method to measure wood chatoyance is unanimously accepted by the scientific community. Some methods have been proposed, such as one named PZC, which was used to measure typical values for a number of wood species; some results are reported below:
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When the term "cat's eye" is used to describe a gemstone by itself, it typically refers to cat's eye chrysoberyl . It can also be used as an adjective to indicate the chatoyance phenomenon in another stone, for example, cat's eye
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effect. When the refractive index of the finish nearly matches that of the wood, light scattering no longer occurs at the wood surface, adding the appearance of depth to the wood's figure.
194:. In cat's eye chrysoberyl, the chatoyant effect is caused by the presence of rutile, composed mostly of titanium dioxide, which aligns perpendicularly to create the cat's eye appearance.
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amongst others. Chatoyancy is not limited to gemstones but can also be found in various wood species and carbon fiber. Synthetically made gemstones with
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woods of China and South East Asia, particularly where stresses from the weight of the growing tree result in denser patches, or where stresses cause
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Chatoyancy is caused by either the presence of fibrous structures within the material, such as in
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can also have chatoyancy. These gemstones are available in a variety of vibrant colors.
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To bring out the chatoyancy effect, gemstones are typically fashioned into a
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1345:, Berlin, Heidelberg: Springer Berlin Heidelberg, p. 224, 2014,
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quartz, or by fibrous inclusions and cavities, as seen in cat's eye
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Applied mineralogy : applications in industry and environment
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cat's-eye quartz. Faceted stones do not showcase the effect well.
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Gem species known for this phenomenon include the aforementioned
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Proceedings of the
Electron Microscopy Society of America (EMSA)
1506:"PZC Chatometry – A standard system to measure wood chatoyance"
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Hancock, Paul L.; Skinner, Brian J., eds. (2006). "gemstones".
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1257:. Translated by Shea, Elizabeth E. (2nd ed.). New York:
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Pisani, Paolo; Zanetta, Laura; Codoro, Davide (2021-12-29).
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Chatoyancy in wood occurs in various species – particularly
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Pages displaying short descriptions of redirect targets
19:"Cat's eye effect" redirects here. For other uses, see
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Pages displaying wikidata descriptions as a fallback
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1404:"Woodworking word of the day: chatoyance | Wood"
1308:
1251:Schumann, Walter; Reinersmann, Daniel (2008).
1317:(1st ed.). Oxford: Oxford Univ. Press.
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1529:Webster, R., Jobbins, E. A. (Ed.). (1998).
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1533:St Edmundsbury Press Ltd, Bury St Edwards.
206:is induced by the presence of the mineral
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381:to become more pronounced. Oil finishes,
72:Learn how and when to remove this message
314:
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93:
83:
1464:Wood Material Science & Engineering
16:Optical reflectance effect in materials
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1434:"What is Chatoyance? – PZC Chatometry"
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169:reflectance effect seen in certain
13:
210:, a mineral primarily composed of
14:
1576:
1313:The Oxford companion to the earth
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1414:from the original on 24 May 2022
1380:"Cymophane gemstone information"
373:This effect is sometimes called
247:Varieties of chatoyant materials
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30:
1351:10.1007/978-3-642-41714-6_31903
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218:Optimal presentation of effect
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1:
1476:10.1080/17480272.2021.2018625
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234:showing the cat's-eye effect.
1436:. 2022-01-12. Archived from
7:
1460:"Measuring wood chatoyance"
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389:can strongly bring out the
202:Chatoyancy in the gemstone
10:
1581:
1282:Mukherjee, Swapna (2011).
18:
1531:Gemmologist's compendium.
340:and the various types of
319:Chatoyance on Tiger's Eye
177:. Coined from the French
1565:Wood-related terminology
44:may need to be rewritten
1288:. Dordrecht: Springer.
320:
235:
179:
99:
91:
1254:Minerals of the World
1068:Rosewood, Madagascar
676:Fir, European Silver
370:, among other names.
318:
311:Cat's eye terminology
225:
97:
87:
1536:Mitchell, T. et al.
1259:Sterling Publishing
1220:Asterism (gemology)
1060:Rosewood, Kingwood
1440:on 12 January 2022
995:Pine, unspecified
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92:
1560:Optical phenomena
1360:978-3-642-41713-9
1229:Optical phenomena
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1164:Walnut, European
1076:Rosewood, Santos
1052:Rosewood, Indian
469:, American White
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54:lead layout guide
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565:Cedar, Spanish
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157:), also called
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1410:. 2022-05-24.
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1261:. p. 19.
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410:(common name)
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332:In woodworking
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1408:WOOD Magazine
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1339:"chrysoberyl"
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905:Oak, Sessile
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785:Limba, Black
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263:(especially.
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65:
55:
52:and read the
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1537:
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1510:. Retrieved
1508:(in Italian)
1500:
1467:
1463:
1453:
1442:. Retrieved
1438:the original
1428:
1416:. Retrieved
1407:
1398:
1387:. Retrieved
1383:
1374:
1364:, retrieved
1342:
1333:
1312:
1304:
1284:
1277:
1253:
1246:
944:Osage Orange
866:Maple, Hard
515:Black Locust
413:PZC average
400:
390:
374:
372:
367:
364:tiger stripe
363:
359:
355:
349:
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267:varieties),
250:
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201:
185:
175:carbon fiber
162:
158:
107:
101:
68:
62:October 2023
59:
48:Please help
43:
41:lead section
1470:: 277–288.
1044:, Cocobolo
1022:Purpleheart
858:, European
827:, Honduras
815:Louro Preto
796:, European
767:, European
627:, Macassar
557:, European
496:, European
485:Ash, Olive
448:Alder, Red
397:Measurement
277:labradorite
257:chrysoberyl
204:chrysoberyl
198:Description
192:chrysoberyl
188:tiger's eye
180:œil de chat
98:Tiger's eye
89:Tiger's eye
1555:Mineralogy
1549:Categories
1512:2022-01-03
1444:2022-05-24
1389:2023-10-20
1366:2023-10-20
1239:References
1148:, African
805:Louro Faia
685:Granadillo
668:, Douglas
656:Eucalyptus
419:Afrormosia
379:wood grain
351:bird’s eye
326:aquamarine
297:thomsonite
273:tourmaline
265:aquamarine
159:chatoyance
108:chatoyancy
1492:245572069
1484:1748-0272
1193:Zebrawood
1107:, Fiemme
1095:Satinwood
574:Cerejeira
338:hardwoods
301:scapolite
293:moonstone
171:gemstones
21:Cat's eye
1418:3 August
1412:Archived
1214:See also
1203:Ziricote
1116:Sucupira
1042:Rosewood
955:Ovangkol
946:, Green
885:Mulberry
875:Movingui
846:Mansonia
825:Mahogany
605:, Sweet
603:Chestnut
586:, Black
391:wet look
375:wet look
368:quilting
285:feldspar
281:selenite
269:charoite
240:cabochon
228:cabochon
165:, is an
104:gemology
1540:, 1982.
1523:General
1032:Red Gum
614:Cypress
545:Bubinga
535:Bog Oak
429:Afzelia
387:shellac
289:apatite
167:optical
161:or the
154:-ən-see
1490:
1482:
1357:
1321:
1292:
1265:
1146:Walnut
1105:Spruce
1085:Sapele
1004:Poplar
965:Padouk
924:Okoume
914:Obeche
897:, Red
836:Makore
725:Jatoba
695:Guarea
646:Etimoe
584:Cherry
525:Bocote
457:Anigre
385:, and
360:ribbon
253:quartz
232:quartz
208:rutile
1488:S2CID
1197:19.1
1173:Wenge
1167:17.5
1159:18.6
1151:20.2
1140:14.7
1136:Tineo
1130:15.7
1099:13.9
1089:20.7
1079:12.5
1071:11.7
1063:14.3
1055:11.2
1036:12.6
1026:13.7
1016:11.9
1008:14.7
998:13.2
990:10.7
979:10.5
969:17.4
959:20.0
949:17.0
934:Olive
928:23.6
918:11.1
908:12.6
900:12.2
889:18.2
879:15.3
869:16.1
861:14.2
856:Maple
850:18.0
840:21.0
830:21.4
819:11.3
809:17.4
799:12.2
788:18.7
780:16.1
776:Limba
770:10.9
765:Larch
759:12.5
749:26.4
739:23.0
735:Khaya
729:17.5
719:21.8
715:Iroko
709:11.7
699:17.2
689:14.3
679:10.0
671:11.1
660:13.9
650:22.1
640:14.5
630:11.3
625:Ebony
608:14.4
597:15.7
589:18.0
578:14.1
568:21.3
555:Cedar
549:19.2
539:11.6
529:11.5
519:16.4
509:18.3
505:Birch
499:10.6
494:Beech
488:14.9
480:12.8
472:11.5
461:14.4
451:16.8
443:15.0
439:Alder
433:14.1
423:14.2
383:epoxy
356:flame
342:Nanmu
261:beryl
1480:ISSN
1420:2022
1355:ISBN
1319:ISBN
1290:ISBN
1263:ISBN
1207:7.0
1187:9.8
1177:8.5
1126:Teak
1120:9.8
1110:9.3
1047:9.5
985:Pine
975:Pear
938:8.3
794:Lime
755:Koto
619:9.3
560:7.6
408:Wood
346:burl
299:and
150:shə-
1472:doi
1347:doi
1183:Yew
895:Oak
745:Koa
705:Ipe
666:Fir
636:Elm
467:Ash
348:or
152:TOY
102:In
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