Greenockite

specimen number:
2262376

location:
Mono Co., California, USA

description:
Yellowish masses of greenockite on matrix with minor sphalerite. Good locality example for the species.

Greenockite is a rare cadmium sulfide mineral with a bright yellow, orange, or reddish-orange color. It typically forms earthy crusts, powdery coatings, or tiny hexagonal crystals, often occurring as an alteration product on other sulfide minerals like sphalerite in low-temperature hydrothermal veins and sedimentary deposits. Named in honor of Lord Greenock, a British military officer and patron of science, it serves as one of the primary commercial ores of cadmium.

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