Quartz with Chalcopyrite, Dolomite
specimen number:
1654838
location:
Nant Helen opencast coal mine, Onllwyn, Neath Port Talbot, Wales, UK
description:
Glassy gemmy crystals of quartz measuring to 4.0 cm in size across the top of matrix with crystals of colorless rhombohedral dolomite and small golden crystals of chalcopyrite. Some damage present, still a very nice specimen for this Welsh locality.
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