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UV reactivity The small amount of hyalite will react a strong yellow-green color under 395nm UV or 365nm UV light
some displaying the Mercedes termination characteristic of the Erongo region
They have a yellowish coloration under the surface with some transparency
Another is tipped with metallic radial growth
The good news is that Platin
Chocolate dogtooth calcite, large Ferruginous quartz UV reactivity The small amountLocale: 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
