Petroleum Quartz Specimen - Large Needle ClusterPetroleum Quartz Specimen About This Specimen Petroleum Quartz, a carbon containing quartz, is characterized by the inclusion of crude oil within the crystal structure. It is created in high temperature and high pressure growth environments, allowing liquid to be trapped within the quartz. These stones fluoresce under UV light. This specimen would make a wonderful display piece, containing a central cavity full of petroleum quartz needles that glow a
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