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The shape of the specimens suggests that gravity induced stalagmites cautilized the unique form of the crystals
this specimen is from the same are in Arizona
The presence of chromium and iron within the underlying rock
The Pennsylvanian period also known as the Late Carboniferous period is the younger of two sub periods of the Carboniferous Period
Dogtooth Calcite Druzy Crystal Cluster Santa Eulalia Chihuahua, Mexico Greem Tourmaline The shape of the specimensBeautiful Dogtooth Calcite Druzy Cluster is a dense clusters of grayish brown opaque, dogtooth crystals. Dogtooth Calcite Druzy Clusters are calcite, or calcium carbonate. Tight clusters of well developed calcite druzy scalenohedrons coat the top of a dark brown matrix of hematite. These crystal formations with their long, sharp terminations resembling shape of dog's teeth are what give the crystal its name . These specimens come from Santa Eulalia
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