Cassiterite sand, Echassières quarry, Allier, Auvergne.

40,00

Here’s a tube filled with a sand made up of millimetric cassiterite crystals (nice with a binocular loupe).

This sand comes from the washing products of the Echassières kaolin quarry, in the Allier department of Auvergne.

Collected in September 1990.

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