In gemology, aventurescence (sometimes called aventurization) is an optical reflectance effect seen in certain gems. The effect amounts to a metallic glitter, arising from minute, preferentially oriented mineral platelets within the material. These platelets are so numerous that they also influence the material`s body colour. In aventurine quartz....
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http://en.wikipedia.org/wiki/Aventurescence
A glittery appearance of the surface of a gemstone,caused by the reflection of light off small mineral inclusions.Aventurine Quartz and Goldstone (glass) both have aventurescence.
Found on
http://www.encyclo.co.uk/local/22148
No exact match found.
