Chocolate dogtooth calcite, large Ferruginous quartz They have a yellowish coloration

They have a yellowish coloration under the surface with some transparency

UV reactivity The small amount of hyalite will react a strong yellow-green color under 395nm UV or 365nm UV light

The good news is that Platin

Approx dimensions: 2 x 1 x

Approx weight: 71g

Chocolate dogtooth calcite, large Ferruginous quartz They have a yellowish colorationLocale: Santa Eulalia, Chihuahua, Mexico Approx size: 3. 75 x 2. 25 x 2. 25" Approx weight: 485g (about 1 lb) Known by the trade name "chocolate dogtooth calcite," this type of calcite from the famed Santa Eulalia mining district grows in hedgehog clusters of sharp dogtooth (scalenohedral) crystals. The variety gets its distinctive opaque brown appearance from iron oxides; a layer of hematite included calcite is deposited on the surface during a later