Blue Calcite Spheres / 50-80mm AVG - 1 KILO Menu Angels while the black portions of

while the black portions of the stone are manganese oxide

Red Calcite

Mixed Shape Black Obsidian Towers

meaning it contains round or circular inclusions of other minerals

Green Quartz: Developed through the presence of iron impurities during the crystallization of silicon dioxide in various geological environments

Blue Calcite Spheres / 50-80mm AVG - 1 KILO Menu Angels while the black portions ofQuantity: 1 kilogram Average size range: 50 to 80 millimeters Calcite is a mineral that forms mostly in limestone deposits and caves, and can exhibit a wide range of colors depending on the impurities and trace elements it absorbs from the surrounding area. This variety of calcite derives its color from copper inclusions that oxidized while it formed.