Malachite 4mm Coin Faceted - 15-16 Inch Memory They are rough specimens but

They are rough specimens but polished on one side to show off all it's amazing colors

or even multi-colored

It is an opaque stone

and it can be mottled or striated with veins of these colors

A form of chalcedony made of quartz

Malachite 4mm Coin Faceted - 15-16 Inch Memory They are rough specimens butMalachite is a copper carbonate with a bright green color and dark green banding. Usually found near copper deposits, it is formed through the combination of carbonated water, limestone and copper. Famous malachite mines in the Ural mountains of Russia once produced 20 to ton blocks of the stone, while today it is primarily mined in Africa. Malachite was used extensively as decoration in the palaces of Russian tsars and forms the columns of St. Isaacs