Mineral: Sphalerite
Locality: Androvo Mine, Erma Reka, Zlatograd, Smolyan Oblast, Bulgaria
Dimensions: 3.8 × 3.7 × 3 cm

Description: Group of crystals that are very rich in faces with the predominant form of the tetrahedron. They are bright, translucent, and exhibit an intense, deep green color. Due to its transparency and color intensity, it rivals or even surpasses the renowned green sphalerites from Áliva Mine, Spain.

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