Marcasite, Dolomite, Quartz
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Marcasite on dolomite with quartz, close-up of a 4.5-cm geode, from Brummetts Creek, near Bloomington, Monroe County, Indiana; collected in 1986. Terry Huizing collection; John Rakovan photo.
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Added on02/13/2026
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Publications
- Mineralogical Record Self Collected Minerals page 160
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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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