$200Median
91Sold (12 mo)
$300Last sale
Updated 1d ago
Marcasite from Sweetwater Mine, Missouri, USA
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Lustrous golden crystals of marcasite to 0.4 cm in size mostly covering the top of matrix. In good condition. There is a slight iridescence to the specimen.The Sweetwater Mine, situated in the southern portion of the Viburnum Trend in Reynolds County, Missouri, is a world-class Mississippi Valley-type deposit hosted within the porous platform carbonates of the Upper Cambrian Bonneterre Dolomite. Mineralization formed through ancient hydrothermal fluid migration, concentrating metal sulfides within ancient reef and algal mound structures. Modern exploration of the district began in the mid-1950s, leading to major underground operations such as Sweetwater (originally developed as the Ozark Lead Company mine) starting production in the late 1960s to extract valuable ore minerals. Beyond its significant industrial output of lead, copper, and zinc, the mine became globally renowned among mineral collectors for yielding pristine, highly sculptural crystals, particularly large scalenohedral calcite prisms, lustrous galena, and associated accessory minerals.
Product details
SpeciesMarcasite
SizeSmall Cabinet
Dimensions5.3 x 2.9 x 1.5 cm
Listed on11/06/2026
LocalityUSA, Missouri, Sweetwater Mine
SKU9892193
Current owner
WM
Weinrich MineralsFeatured
3,650 for sale·9 sold
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Mineral guide
Learn about Marcasite
orthorhombic dimorph of pyrite with cockscomb blade clusters, metallic luster and iridescent tarnish; prized for sculptural form yet requires caref…Regional guide
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