Minerals / Haematite, Marine colliery.

Hematite,  Fe₂O₃  iron oxide, with siderite,   FeCO₃ iron carbonate. The haematite in this specimen is in the form of many angular shards, which were created as the result of hydraulic brecciation. The spaces and voids have been populated by small platey crystals of siderite. Also on the specimen is one " herkimer " quartz crystal. The specimen was collected from Marine colliery waste tips, near Ebbw Vale, south Wales

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