Pegmatite
Igneous Pegmatite
Category
Browse mineral like industrial smelting waste specimens identified by the Rock Identifier community.
Pegmatite
Igneous Pegmatite
Cobalt Glass Slug (Man-made Glass)
Amorphous Silica with Cobalt Oxide (SiO2 + CoO)
Rainbow Fluorite
Fluorite (Calcium Fluoride, CaF2)
Quartz Vein / Milky Quartz
Silicon Dioxide (SiO2)
Ferruginous Sandstone (Ironstone)
Arenite with Limonite/Goethite cement
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
Ruby (Raw Corundum)
Al2O3 (Aluminum Oxide)
Fluorite (Purple/Blue variety)
Calcium Fluoride (CaF2)
Chert (specifically Tan/Brown Chert)
Chert (SiO2)
Ironstone Nodule
Ironstone (Ferruginous Rock)
Fluorite
Calcium Fluoride (CaF2)
Granitic Pegmatite with Schorl Tourmaline
Granitic Pegmatite (Schorl: NaFe3Al6(BO3)3Si6O18(OH)4)
Quartz with Iron Oxide
SiO2
Limonite (Iron Ore)
Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)
Massive Milky Quartz (with Iron Inclusions)
Quartz (Silicon Dioxide, SiO2)
Pegmatite (Granitic)
Granite Pegmatite
Metal Alloy (Likely Pewter or Sterling Silver)
Not a natural geological specimen; composed of refined metals. If pewter, it's a tin-based alloy. If sterling silver, it's 92.5% silver and 7.5% other metals (usually copper).
Limonite (Iron Ore)
Hydrated ferric oxide mixture (FeO(OH)·nH2O)
White Marble
Recrystallized Calcite (CaCO3)
Pegmatite
Pegmatite (felsic intrusive igneous rock)
Wavellite with Quartz
Al3(PO4)2(OH,F)3 & SiO2
Granitic Pegmatite
Pegmatitic Granite
Sandstone
Arenite (SiO2 primarily)
Pegmatite
Igneous Pegmatite
Quartz (Iron-Stained)
Crystalline Silicon Dioxide (SiO2)
Limonite (Iron Ore)
Limonite (an FeO(OH)·nH2O mineraloid, not a true mineral due to variable composition)
Native Copper in Matrix
Native Copper (Cu)
Fluorite
Calcium Fluoride (CaF2)
Pegmatite
Igneous Pegmatite
Pegmatite
Igneous Pegmatite
Silicon
Element Si
Mica Schist
Muscovite/Biotite Schist
Granitic Pegmatite with Tourmaline/Chlorite
Pegmatite
Garnet
Garnet Group (Silicate Minerals), formula varies e.g., Alm: Fe3Al2(SiO4)3
Quartz with Muscovite Mica
SiO2 with KAl2(AlSi3O10)(OH)2
Quartz pebble
Silicon dioxide (SiO2)
Limonite / Ironstone
Limonite (Hydrated Iron Oxide) - FeO(OH)·nH2O
Schist
Mica Schist
Fluorite
Calcium Fluoride (CaF2)
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) in matrix
Kaolin (China Clay)
Kaolinite [Al2Si2O5(OH)4]
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)