Boulby Mine, Loftus, North Yorkshire, England


Rich specimen displaying two generations of boracite, an earlier one of aggregated turquoise crystals, transparent on their edges, in part overgrown by a later generation of smaller opaque crystals. All the crystals have a tetragonal appearance although boracite is orthorhombic. The colour of boracite deepens when viewed in incandescent lighting compared to daylight

Formula: Mg3B7O13Cl

Status: Sold

Dimensions: 70x50x40mm

Size: Small Cabinet (S)

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