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Goldstone (gemstone)
Goldstone is a type of glittering glass made in a low-oxygen reducing atmosphere. The finished product can take a smooth polish and be carved into beads, figurines, or other artifacts suitable for semiprecious stone, and in fact goldstone is often mistaken for or misrepresented as a natural material.
== Nomenclature ==
Another common name for the material is aventurine glass, based on the original Italian name ''avventurina'' (from ''avventura'', "adventure" or "chance"). It is also sometimes called "stellaria," "sang-e setareh" or "sang-e khorshid" (''sang'' means 'stone', 'khorshid' means 'sun' and ''setareh'' means 'star' in Persian) for its starry internal reflections, or "monk's gold" or "monkstone" from folkloric associations with an unnamed monastic order.
The material is sometimes called sandstone when used in watch dials, despite its lack of resemblance to the porous, matte texture of the natural stone.
Curiously, "aventurine" glass is one of the few synthetic simulants to provide the eponym for the similar natural stones. The mineral name "aventurine" is used for forms of feldspar or quartz with mica inclusions that give a similar glittering appearance; the technical term for this optical phenomenon, "aventurescence," is also derived from the same source.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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