Malachite 5x10-20mm Top Drill Teeth - 15-16 Inch 48hr_08052024 Hematite is an iron oxide

Hematite is an iron oxide and one of the few gemstones with a metallic luster

Common Opal is generally opaque

Mixed Lodolite is Quartz with inclusions of sand

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

It is not a mineral

Malachite 5x10-20mm Top Drill Teeth - 15-16 Inch 48hr_08052024 Hematite is an iron oxideMalachite 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