Staurolite Twins

Staurolite is a silicate mineral which occurs in metamorphic rocks and is often found with the minerals kyanite and garnet. Staurolite is a 7 to 7.5 on the Mohs Hardness Scale which has a range from 1 (softest) to 10 (hardest), has a glassy to resinous luster and a colorless streak. Prismatic crystals of staurolite are common and often found twinned.

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.”Â  Staurolite forms in metamorphic rocks […]