Specimen Number46-7-009Alternate Number68-4-1CommentsAltered porphyritic syenite. Need XRD to evaluate dark brown phase that forms matrix to k-spar phenocrysts, it's almost cryptocrystalline.In Teaching CollectionNoMineral(s)k-sparRock NamesyeniteDistrictKirunaMineKiirunavaaraExternal LinkMindatDeposit TypeKiruna-typeGeo-Coords[1] Donated ByUniversity of Wisconsin-Madison Department of Geoscience