general/quartz
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Quartz
Mineral made of silicon and oxygen
Cape May diamonds
Quartz pebbles found on beaches in New Jersey, US
Smoky quartz
Brown to black variety of quartz
Tiger's eye
Chatoyant gemstone from the quartz family
Aventurine
Green quartz variety
Ametrine
Mineral, quartz variety
Herkimer diamond
Quartz crystals found in New York
Quartzite
Hard, non-foliated metamorphic rock