Glossary · Minerals
Chatoyancy
The cat's-eye effect: a band of reflected light moving across a cabochon, caused by parallel fibres or needle inclusions — tiger's eye, chrysoberyl cat's-eye, some tourmaline.
The cat's-eye effect: a band of reflected light moving across a cabochon, caused by parallel fibres or needle inclusions — tiger's eye, chrysoberyl cat's-eye, some tourmaline.
Sources
Cite this article
Stratum Study. "Chatoyancy" (Glossary). Stratum Study pack 2026.09, as of 2026-09-16. https://stratum.black/study/glossary/chatoyancy. Accessed 2026-09-20.
@misc{stratum-chatoyancy,
title = {Chatoyancy},
author = {{Stratum Study}},
howpublished = {\url{https://stratum.black/study/glossary/chatoyancy}},
year = {2026},
note = {Glossary article, Stratum Study pack 2026.09, as of 2026-09-16; sources: stratum. Accessed 2026-09-20.}
} Citations carry the pack version and the article's as-of date so they resolve to the same text later. The facts themselves belong to the sources listed below; cite those for the science.