Geology of Gems

Selected Gems

Examples of gemstones and display mineral samples. Many of these stones are on display at the Gemological Institute of America, Carlsbad, CA
Click on images for a larger view.
Amethyst geode Amethyst from Brazill Citrine Citrine Quartz Crystal
Amethyst Citrine Citrine Quartz
Amethyst Quartz vein filling Smoky Quartz Opal
Amethyst Quartz Smoky Quartz Opal
Quartz Crystal Morganite beryl Red Beryl
Amethyst geode
Rhodochrocite
Rhodochrocite Quartz Beryl Morganite (Beryl) Red Beryl
Rhodochrocite aquamarine Emerald Fluorite Red Beryl
Rhodochrocite Aquamarine Emerald Fluorite with Calcite Red Beryl
Almandite Garnet Biotite Calcite Mother of Pearl Olivine
Almandinite Garnet Biotite Calcite Mother of Pearl Olivine
Blue-Cap Tourmaline Emerald in Calcite Kunzite Feldspar Dolomite
Blue-Cap Tourmaline Emerald in Calcite Kunzite Feldspar Dolomite
apatite Fluorite Fluorite Fluorite apophyllite
Apatite Fluorite Fluorite Fluorite Apophyllite
Crysoberyl Malachite Morganite Watermelon Tourmaline Microcline feldspar
Chrysoberyl Malachite Morganite Watermelon Tourmaline Microcline (Feldspar)
Ruby Ruby Peridot from Burma Red Tourmaline Green Tourmaline
Ruby in Calcite Ruby Peridot Red Tourmaline Green Tourmaline
Kunzite (Spodumene) Rose Quartz Ruby Morganite Topaz
Kunzite (Spodumene) Rose Quartz Ruby Morganite Topaz
Azurite and Malachite Agate amber ammonite Barite Rose
Azurite and Malachite Agate Amber Ammonite Barite Rose
Beryl Watermelon Tourmaline Synthetic Ruby Watermelon Tourmaline Topaz
Aquamarine (Beryl) Watermelon Tourmaline Ruby (synthetic) Watermelon Tourmaline Topaz
http://geologycafe.com/gems/gia.html
6/6/15