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The main smoky quartz point is over three inches and attached to several partial prisms and shard-like pieces
it has the same chemical composition (silica) but different crystal structure (cryptocrystalline vs
Locality: Mexico
though it does have some interesting cactus-quartz growth on that top portion
Where stalactites have broken you can see a pinpoint of a dark
Chocolate dogtooth calcite, large Lodolite The main smoky quartz pointLocale: 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
