Petro Tourmaline 7x9mm Nugget - 13-14 Inch R0084 These gauges are often used

These gauges are often used to display dimensional information in science & engineering but is convenient for creative use as well

The fibrous asbestos inclusions in the stone give it the flash that inspired its name

It is often used in kiln furniture and foundry molds

Ethiopian Opal typically occurs in brown

All gemstones are fascinating and special

Petro Tourmaline 7x9mm Nugget - 13-14 Inch R0084 These gauges are often usedTourmaline 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