Classic penetration-twinned "X" or "cross" of sharp, doubly terminated staurolite crystals in muscovite schist
Dimensions (millimeters): 35 x 30 x 15
Dimensions (inches): 1.4 x 1.2 x .6
Origin: mined Kola Peninsula, Russia
The metamorphic mineral that has become so famous for its twinned crystals that it has received many nicknames through the ages.
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