Malachite 15-22x23-33mm AAA Grade Medium Free Form Cabochon Brazilian Though it is widely known

Though it is widely known to be untrue

Red Agate is a form of Chalcedony

however it does exhibit a lustrous sheen referred to as “opalescence

It is a rare occurrence to find gem-grade hackmanite

This variety of opal is named "dendritic" for the small inclusions within it that resemble moss or ferns

Malachite 15-22x23-33mm AAA Grade Medium Free Form Cabochon Brazilian Though it is widely knownMalachite 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