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Flint – Chert (1kg)

Crinoidal Limestone (1kg)

£5.00 ex VAT

Greywacke (1kg)

£5.00 ex VAT

£5.00 ex VAT

Chert, a hard cryptocrystalline silica found as nodules & bands within the Cretaceous Chalk. Supplied by weight in 1 kilo bags.

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Chert is a hard, cryptocrystalline silica of sedimentary origin. It is often to be found as nodules & irregular masses within sedimentary rocks. It is specifically associated with chalk & marly limestones. They can be found in variety of colours from dark grey-black, brown, green through to yellow & white. Often with a white, rough textured outer layer. Supplied in lots of 1 kilogram in a polythene bag with data label, size of pieces may vary.

Weight 1100 g

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