Tourmaline Natural 6-7mm Table Cut Cube Bead - 15-16 Inch Stone Type_Sardonyx thought to be derived from

thought to be derived from trace amounts of titanium

Naturally occuring in hues of blue-green to green with spots and streaks of red

5-6 medium ranging 18-25mm

It has been mistaken for ruby and sapphire at times

A cryptocrystalline Chalcedony

Tourmaline Natural 6-7mm Table Cut Cube Bead - 15-16 Inch Stone Type_Sardonyx thought to be derived fromTourmaline 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