Marcasite Stalactite from Linwood Mine DX3172 amethyst Beautifully formed sphalerite crystals protrude

Beautifully formed sphalerite crystals protrude from the top of the specimen

but what sets aragonite apart is its unique arrangement of atoms

Skeletal Smoky Quartz

Spessartine Garnet and Smoky Quartz

Amazonite is known for its attractive appearance and has been used in various decorative and lapidary applications

Marcasite Stalactite from Linwood Mine DX3172 amethyst Beautifully formed sphalerite crystals protrudeMarcasite Stalactite from Linwood Mine Approx. Dimensions: 1. 75x1x0. 75 inches Approx. Weight: 17. 8 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