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Dogtooth spar


  • Webster's Revised Unabridged Dictionary
    • Dogtooth spar (Min) a variety of calcite, in acute crystals, resembling the tooth of a dog. See Calcite.
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In literature:

Another form of calcite which is to be sparingly found is what is called dogtooth spar, having the form shown in Fig.
"Scientific American Supplement, No. 344, August 5, 1882" by Various