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Corundum Mineral
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Corundum is one of the hardest minerals at a 9 on the Mohs Hardness scale. This mineral is found worldwide in igneous and metamorphic rocks. The red and blue varieties of corundum are the gemstones ruby and sapphire, respectively. An information card with details on the rocks formation, mineral content, characteristics and uses is included.
WARNING: CHOKING HAZARD - Small Parts. Not for Children Under 3 years.