Chrysocolla 6mm Star Cut Coin - 15-16 Inch Size_1x2-3x4mm currently believed to be due

currently believed to be due to the presence of a copper-based mineral such as Malachite or Azurite

as well as brown to reddish brown or red in color

This gemstone strand comes as a complete necklace including a base metal lobster clasp and 2" extender

and much of the black Onyx on the market has been artificially colored

and chromium lends a beautiful pink or purple

Chrysocolla 6mm Star Cut Coin - 15-16 Inch Size_1x2-3x4mm currently believed to be dueChrysocolla, a hydrous copper silicate, is often mistaken for turquoise due to its rich blues and blue to greens. It often also occurs with colors of rust, copper, black, white and reddish brown in speckles, veins and brecciated patterns. It is a very soft stone typically found near copper deposits. Chrysocolla was first described by Theosphrastus, a Greek philosopher and botanist who also named the stone, in 315 BCE.