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This is a beautiful slab of very rare plume agate from the Nydegger Ranch near Post
Dimensions: 30x15x8 mm
Locality: Sokolovskoe Mine
Auvergne-Rhône-Alpes
Weight: 46 grams
Marcasite Stalactite from Linwood Mine DX3162 hedenbergite This is a beautiful slabMarcasite Stalactite from Linwood Mine Approx. Dimensions: 1. 75x1x0. 5 inches Approx. Weight: 8. 6 grams Locality: Linwood Mine, Buffalo, Scott Co., Iowa, USA Marcasite specimens from the Linwood Mine (Buffalo, Scott County, Iowa, USA) are eye catching mineral pieces prized by collectors for their metallic luster and distinctive crystal forms. Marcasite is an iron disulfide (FeS?) mineral that crystallizes in tabular, spear like or stalactitic
