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Staurolite – Now this is a cool mineral!

Staurolite is a unique mineral which often forms cross-shaped twinned crystals.  While staurolite is generally brown it has a colorless to grey streak and it is about as hard as quartz (7 to 7.5 on Mohs hardness scale).  The name staurolite comes from the Greek word stauros which means “cross.”  Staurolite forms in metamorphic rocks […]

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