Orbicular Sphalerite on Marcasite | Missouri Red fluorescent the rosettes erode into positive

the rosettes erode into positive relief on exposed rock surfaces

25" x 2" x 0

This item is 4” x 3” and weighs 10

25” and weighs 15

Orbicular Sphalerite on Marcasite | Missouri Red fluorescent the rosettes erode into positiveSphalerite is a part of the sulfide group and typically exhibits a grey black appearance due to high concentrations of impurities. In its purest state, sphalerite's chemical composition is ZnS, and can display a gemmy transparent light tan yellow color. This is one of the few minerals that can form crystals ranging anywhere between gemmy and transparent to opaque and metallic like. Opaque or cloudy sphalerite tends to be most abundant since iron