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Abundant cavities in a sulphide impregnated Quartz veinstone display well-formed platy crystals of metallic grey Polybasite with Stephanite measuring to around 7mm, and abundant brassy-yellow crystals of Pyrite. Sphalerite is seen only as a granular mix in the Quartz groundmass. From the Bansk' 'tiavnica mining area in Slovakia.
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