Highly lustrous complex stepped tetrahedral sphalerite twin ball crystals from the second Sovetskii Mine Dalnegorsk, Dalnegorsk, Primorsky, Krai, Russia. The Dalnegorsk District is the world’s best locality for super luster black sphalerite crystals we think. Early 90’s. Ex. Hughes collection. 7 x 4.5 x 3.5 cm. 164 grams. Note: these are not often found in this stepped formation.
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