Dugway Geode Pair DD1636 topaz Approximately 6 to 8 million

Approximately 6 to 8 million years ago (Miocene epoch)

Topaz is a silicate mineral of aluminum and fluorine commonly used in jewelry

Thulite earrings set in sterling silver

Dimensions: 1x1

but elemental impurities can give it colors from pale blue

Dugway Geode Pair DD1636 topaz Approximately 6 to 8 millionDugway Geode Pair Approx. Dimensions: 3. 5 x 4 x 1. 75", 3. 5 x 3. 5 x 1. 5" Approx. Weight: 628 grams (total) Locality: Dugway Geode Beds, Juab County, Utah This piece reacts to long wave ultraviolet light, shown in the last photo. Many portions of the inside of the geode glow a vibrant green. Approximately 6 to 8 million years ago (Miocene epoch), volcanic activity occurred in western Utah and deposited an extrusive igneous rock called rhyolite.