Flint
Flint Knapping | Flint (SiO2 - Silicon Dixoide) is a bio-sedimentary material that was formed in the ocean millions of years ago. It is almost pure silica, containing less than 5% impurity in the form of Calcium Carbontate. It is very fine crystalline grain gives flint a glassy character so that when struck it fractures conchoidally, which makes it perfect for knapping.
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