Quartz (var. smoky-citrine)
|Catalog Number||NMNH 166840-00|
|Locality||Sapucaia Mine, Minas Gerais, Brazil|
From the exhibit
These two gem quality crystals have the six sided pencil shape typical of quartz. Together they weigh a whopping 52.6 kg (117 lb). If you look closely, you can see smaller crystals growing on their surfaces.
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