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Crushed Rhyolite Construction

Apr 11, 2018 Rhyolite rocks have a hardness of 6 according to Mohs scale of hardness. It is sometimes used as crushed stone when other better materials are not available. In the past, stone tools, scrapers, blades, hoes, axe heads, and projectiles points have been produced by ancient peoples using rhyolite, but most likely out of necessity.