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Blende and Bournonite from the Malines mine in Gard (1981) Former collection.
Chemical composition of the Bournonite: lead and copper sulphoantimonide (PbCuSbS3) Hardness: 2.5/3 on the Mohs scale.
Stone dimensions: L: 75mm x W: 40mm x H: 70mm x weight with base: 210g.