Jet 6mm Heishi - 15-16 Inch R1365 It is a particularly unusual

It is a particularly unusual gem because it exhibits a special optical property known as "tenebrescence

Specially designed for cutting hard wire

as well as some occurrences of dark gray

while other impurities in the stone may create veining and rich patterns

Jet 6mm Heishi - 15-16 Inch R1365 It is a particularly unusualJet is a mineraloid gemstone, formed from wood that has decayed under extreme pressure, over the course of millions of years. Because it is relatively soft, it is easily carved and shaped. Jet is made from wood, and this can be confirmed under magnification, as it preserves the original cellular structure of the wood from which it formed.