Corrundum (Placer) - Mineral sledge hammer Country of Manufacture: Mexico

Country of Manufacture: Mexico

Approximate size of 1 piece: 12mm x 78mm x 78mmInternal Diameter: 6cm

5mm x 4mm x 1

Approximate Size of Brachiopod Fossil: 1

Corrundum (Placer) - Mineral sledge hammer Country of Manufacture: MexicoMined from: Alder, Montana Description: This natural corundum placer specimen comes from the historic gem bearing gravels of Alder, Montanaan area long celebrated for its sapphires and other alluvial treasures. These water worn corundum fragments were naturally tumbled by ancient stream systems, giving them a slight rounded appearance that reflects their journey through time. Composed of aluminum oxide, corundum ranks 9 on the Mohs hardness scale,