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heavy mineral gem

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heavy mineral gem

Ruby Sapphire – These precious gemstones are the same mineral corundum When found as red corundum it is called ruby Every other color including blue is called sapphire It is the hardest mineral on Earth second to diamond Ruby is the birthstone for July and Sapphire is ... As a leading global manufacturer of crushing equipment, milling equipment,dressing equipment,drying equipment and briquette equipment etc. we offer advanced, rational solutions for any size-reduction requirements, including quarry, aggregate, grinding production and complete plant plan.

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