Blue Tourmaline 4mm Microfaceted Round A Grade - 15-16 Inch rocks-and-specimens according to the Mohs hardness

according to the Mohs hardness scale

This Phantom Quartz is gray

Once cooled

bead measurements

while today it is primarily mined in Africa

Blue Tourmaline 4mm Microfaceted Round A Grade - 15-16 Inch rocks-and-specimens according to the Mohs hardnessBlue Tourmaline ranges in color from green to blue to yellow to green with black, milky white and clear, colorless inclusions. It is an aluminum borosilicate mixed with iron, magnesium and other metals that give it its color. Tourmaline occurs in nearly every color in the rainbow and its name derives from turmali, the Sinhalese word for mixed color precious stone. Tourmaline is unusual in that it is both pyroelectric and piezoelectric, meaning it