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This item is 3”x2
fossilized microbial mats dating back approximately 1
Citrine is a variety of quartz whose color ranges from a pale yellow to brown due to a range of ferric (iron) impurities
It's named after German poet J
This material comes from the Wild Turkey Mine in eastern Washington
Orbicular Sphalerite on Marcasite | Missouri lapis lazuli This item is 3”x2Sphalerite 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
