Blue Tourmaline 4mm Microfaceted Round A Grade - 15-16 Inch 15x30 and features dark manganese dendrites

and features dark manganese dendrites throughout

and is a result of trace amounts of copper or chromium

The opaque stone’s red color is due to high iron content

Kyanite often occurs as long

sometimes containing rainbow inclusions

Blue Tourmaline 4mm Microfaceted Round A Grade - 15-16 Inch 15x30 and features dark manganese dendritesBlue 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