Saturday, May 1, 2010
Gemstone of the Week- Aventurine
So what is this stone? It's actually a variety of quartz chalcedony, so it's chemical composition is silicon dioxide. Technically it is a rock, not a mineral, with a hardness around 6.5, which makes it strong in jewelry applications. Aventurine has small inclusions in it, usually mica, that give it that glimmer called aventurescence. The man-made goldstone is thought to be an imitation of natural aventurine, when Italian glassmakers dropped copper shavings into molten glass "a ventura" ("by chance"). IMHO, the real thing looks much nicer. Most aventurine comes from India.