Chert – Foss Mine
£1.20 – £3.01 ex VAT
Specimens of chert found in Foss mine, Scotland, UK. Specimens are supplied in a white card tray with an information label.
Mineral specimens of chert found in Foss mine, Scotland, UK. Chert is a very hard, fine-grained silica-rich microcrystalline, cryptocrystalline or microfibrous sedimentary rock that may contain small fossils. It varies greatly in color from white to black, but most often it is grey, brown, red or greenish. It can occur as a primary deposit or as a replacement mineral during diagenesis e.g. Flint nodules in Chalk. Specimens are supplied in a white card tray with an information label.
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