Mohs Hats
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Description: A vivid fluorite crystal and a hardness test celebrate the Mohs scale. Clever geology humor for mineral collectors, rockhounds, earth science students and teachers.
My Hobby Has a Hardness Scale - Mohs Scale Geology Humor Hat
by sararts2you
$12 $19
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Welcome to Mohs!!! T-Shirt *Back Design/Front Pocket* Hat
by dabblersoutpost
$12 $19
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