Translucent yellowish chatoyant chrysoberyl is called cymophane or cat's eye.
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Another gem variety is the chatoyant form known as cat's-eye actinolite.
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Chatoyant minerals display luminous bands, which appear to move as the specimen is rotated.
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Transparent stones of clean color have been faceted, and chatoyant specimens have been cabochon cut.
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Changeable: varying in color when seen in different lights or from different angles; "changeable taffeta"; "chatoyant (or shot) silk"; "a dragonfly hovered, vibrating and iridescent"
In gemology, chatoyancy , or chatoyance, is an optical reflectance effect seen in certain gemstones. ...
Having a certain optical reflectance effect, which can be likened to the sheen of a spool of silk
(Chatoyance) the effect seen in dramatic wood grain direction changes as seen in flame figured maple.
(Chatoyancy) An effect which resembles the slit eye of a cat caused by reflection of light by parallel fibers, needles or channels in the stone. Most effective in a cabochon cut. Most common is of chrysoberyl.
(Chatoyancy) This is the "cat's eye" effect that is seen in chrysoberyl, for example, here an eye can be seen when the stone is moved under a strong light. This is caused by the narrow inclusions in the stone.
Chatoyancy is the appearance of a shimmering light that moves across the surface of certain stones and appears as a narrow line similar to a cat's eye. This effect is most noticeable on a cabochon cut stone.
(Chatoyancy) The effect in certain translucent stones when cut en cabochon that exhibit a streak of light which moves as the gem is moved. Caused by minute fibrous inclusions.