Marcasite Stalactite from Linwood Mine DX3171 ganesha Vivianite is an iron phosphate

Vivianite is an iron phosphate known for its vitreous to pearly luster and bladed or prismatic crystal forms

5" Ytrium Fluorite Freeform

This mineral is known for its prismatic crystal habit and two distinct cleavage directions

the mineral that makes up the fossilized shell

Marcasite Stalactite from Linwood Mine DX3171 ganesha Vivianite is an iron phosphateMarcasite Stalactite from Linwood Mine Approx. Dimensions: 2x1x0. 75 inches Approx. Weight: 16 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 clusters