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For a little flash I have added my Colemanite, The large blade is 7/8" x 3/8" (2.22 x 0.95 cm). This example is from the Boraxo Mine, Death Valley, Inyo County, California. (Author: Jim Prentiss)

For a little flash I have added my Colemanite, The large blade is 7/8" x 3/8" (2.22 x 0.95 cm). This example is from the Boraxo Mine, Death Valley, Inyo County, California. (Author: Jim Prentiss)

Dimensions: 572 x 750
File size: 39.87 kbytes
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