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This mineral is composed only of one element, carbon. It is listed as the hardest on MOHs scale of hardness. Which mineral is this? A. Diamond B gold C Gypsum D quartz
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This mineral is composed only of one element, carbon. It is listed as the hardest on MOHs scale of hardness. Which mineral is this? A. Diamond B gold C Gypsum D quartz

User TomT
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a

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User Wsn
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