Assertion: chrysoberyl's band | /r/HasProperty | thin narrow
Facets:
Source sentences:
text: If a Chrysoberyl exhibits a thin narrow band of reflecting light across its length which slightly moves when a polished gem is rotated, the effect is known as a cat's eye effect.
text: If a Chrysoberyl exhibits a thin narrow band of reflecting light across its length which slightly moves when a polished gem is rotated, the effect is known as a. Cat's eye and cymophane effects are caused by microscopic, parallel, needlelike inclusion s that cause the light to reflect distinctly within a stone.