Sphalerite 925 Silver Pendant from Spain - 0.8" - 4.25 Grams bracelet A very nice gem quality

A very nice gem quality Sphalerite cabochon with a really nice transparency

Rubtsovsky District

9 inches long /2

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Sphalerite 925 Silver Pendant from Spain - 0.8" - 4.25 Grams bracelet A very nice gem qualityVery rare rough natural translucent yellowish to honey brown Sphalerite 925 silver pendant from Spain. Sphalerite is a zinc sulfide mineral with a chemical composition of (Zn,Fe)S. Sphalerite is the major ore of zinc. Names for sphalerite used in the past or by miners include "zinc blende," "blackjack," "steel jack," and "rosin jack." Sphalerite has an incredible dispersion of 0. 156 that exceeds that of all of the popular gems and is three times