Tourmaline 4x4-8mm Banded Faceted Tube - 15-16 Inch Size_23x29mm the second-hardest mineral next to

the second-hardest mineral next to diamond

This makes sapphires very durable and scratch-resistant

Tourmaline is unusual in that it is both pyroelectric and piezoelectric

which is not Jasper but rather a combination of Feldspar and Quartz

Tourmaline 4x4-8mm Banded Faceted Tube - 15-16 Inch Size_23x29mm the second-hardest mineral next toTourmaline is classified as a semiprecious stone and occurs in a vast array of colors, everything from colorless to black, from pastel to bright to dark. It can even exhibit various colors within the same specimen. Its name derives from the Sinhalese word turamali, which translates to stone of many colors. Due to this variety of colors, Tourmaline has often been confused with other stones. Many stones in the Russian crown jewels from the 17th century