Smithsonite (var. Cuprian)

Smithsonite is a highly sought-after mineral due to its wide range of crystal habits and colour and one of the most distinctive varieties is this green apple cuprian smithsonite from the 79 Mine. The green colouration is caused by trace amounts of copper substituting into the smithsonite structure, and the specimens from this locality are widely regarded as some of the finest green smithsonites ever found in the US.

This specimen was collected by one of the current mine owners at the 400 Level, the "Smithsonite Stope".  It's a miniature sized piece featuring a plate of rich green botryoidal smithsonite. The surface displays a velvety, waxy to vitreous lustre. The bubbly, botryoidal habit is classic for the species and especially fine from this locality. The piece displays beautifully and is in excellent condition.

Originally discovered in 1879, the 79 Mine is a historic American lead-zinc deposit with a long and complex operational history. It has been worked by several companies over the decades and is renowned not only for smithsonite but also for its exceptional hemimorphite, wulfenite, and aurichalcite specimens. Although the 79 Mine is strictly closed to the public, renewed activity under new ownership has led to a renaissance in specimen production. The mine remains an iconic and important locality for collectors of fine Arizona minerals.