Rough Black Onyx / 1-2" AVG - 1 KILO LOT Menu Fossils Average size range: 2 to

Average size range: 2 to 4 inches

Quartz is formed through the crystallization of silicon dioxide in geological processes such as precipitation in hydrothermal veins

Pieces measure approximately 50 millimeters (AVERAGE SIZE)

Perfect for escort cards

Rough Black Onyx / 1-2" AVG - 1 KILO LOT Menu Fossils Average size range: 2 toQuantity: 1 kilogram Average size range: 1 to 2 inches Onyx is a variety of banded chalcedony just like agate, with the main difference being onyx features parallel bands as opposed to agates curved banding patterns. Black onyx derives its color from quartz and other inclusions while it forms, and it has been popular for both jewelry and hardstone carving.