Black Flower Tourmaline 8mm Round - 15-16 Inch Argentina a 19th-century German professor of

a 19th-century German professor of chemistry and mineralogy

the one you receive may look different from what is shown

with every gradient of gray in between

blue or gray

more commonly referred to as simply Australian Opal

Black Flower Tourmaline 8mm Round - 15-16 Inch Argentina a 19th-century German professor ofBlack Tourmaline is a black crystalline aluminum borosilicate mineral with occasional light gray inclusions that appear as flecks or veins. Tourmaline 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