A shiny mineral, yellow to dark brown or black in color, consisting of zinc sulfide.
- The crystals are perched on quartz along with rosin-colored sphalerite showing the black tarnish reported by Hurst.
- Black sphalerite is found within the gold-quartz vein and in the adjacent country rock.
- Marmatite is the black, high-iron variety of sphalerite.
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