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What Are These Stones ?

Osh

By Osh
in Rocks, Minerals, Gems & Geology

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Geologyhound Silver Contributor

Geologyhound

Posted
Posted

Scrape some of the black flow looking stuff on some unglazed porcelain.  If it leaves a bright red to dark red streak, it is boytryoidal hematite.  If the streak is  brownish black, then it could be psilomelane.

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