Polished Dugway Geode Half DX231 orange calcite Weight: 853 grams

Weight: 853 grams

It has been theorized that this particular variety of quartz gets its unique luster and optical clarity from the addition of Aluminum in its chemical composition

and was contaminated by the Chernobyl disaster in 1986

Malachite Rhinoceros Carving

The Tyndall effect is also the reason why blue chalcedony appears yellow or brown when strong light shines through it

Polished Dugway Geode Half DX231 orange calcite Weight: 853 gramsDugway Geode Approx. Dimensions: 3. 5 x 3. 5 x 2" Approx. Weight: 474 grams Locality: Dugway Geode Beds, Juab County, Utah Includes three prong geode stand This piece reacts to short and long wave ultraviolet light, shown in the last two photos. Many portions of the inside of the geode glow a vibrant green. The fluorescence is due to trace amounts of uranium present in the quartz and chalcedony. Approximately 6 to 8 million years ago (Miocene epoch),