- Sanidine Feldspar
- Itrongay, Mahasoa Est, Betroka, Anosy, Madagascar
- Thumbnail, 3.0 x 1.8 x 1.7 cm
- Ex. Shields and Frances Flynn
A superb, stunning gem crystal of feldspar - one of those rock-forming species we almost never see as true GEMS, and this is perhaps the most famous locality in the world for gem feldspar. A complete floater, literally of cutting grade. Old finds.