Amethyst Shape Heart malachite natural variety of chalcedony known

natural variety of chalcedony known for its deep apple-green colors

These pieces are polished into a mortar and pestle shape

the way light reflects off a surface

75 W x 4 H inches

The black color is often due to the presence of iron impurities within the crystal structure

Amethyst Shape Heart malachite natural variety of chalcedony knownAmethyst is a purple variety of quartz that gets its color from irradiation and inclusions of iron in the crystal lattice. Amethyst has been prized for thousands of years as a gemstone, commonly being used in jewelry. Ancient Greeks believed that amethyst prevented the intoxicating effects of alcohol. Amethyst was considered a precious gem until the 18th century when large deposits were discovered in South America. This piece is polished into a heart