Pyrite
Iron Sulfide (FeS2)
mineral
Category
Sedimentary (Processed Mineral Product)
Browse sedimentary (processed mineral product) specimens identified by the Rock Identifier community.
Learn about Sedimentary (Processed Mineral Product) in the encyclopedia
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Mahogany Obsidian
Volcanic glass (Silicon Dioxide with Hematite/Magnetite inclusions)
igneous
Quartz / Quartzite
Silicon Dioxide (SiO2)
Mineral / Metamorphic
Mica (Biotite or Phlogopite variety)
Phyllosilicate (complex mineral formula involving K, Mg, Fe, Al, Si, and O)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Limonite/Goethite (Iron Ore)
Hydrous ferric oxides (FeO(OH)·nH2O)
mineral
Iron Ore (Limonite and Hematite)
Goethite/Limonite (FeO(OH)·nH2O) and Hematite (Fe2O3)
mineral
Red Sandstone
Arenite (primarily Quartz with Hematite cement)
sedimentary
Serpentinite
Serpentinite
metamorphic
Shale
Lutaceous sedimentary rock
sedimentary
Quartz Geode
Silicon Dioxide (SiO2) in Host Rock
sedimentary
Serpentinite
Serpentinite (composed primarily of minerals in the Serpentine group: Chrysotile, Lizardite, and Antigorite)
metamorphic
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Granite
Granitoid (composition typically SiO2, Al2O3, K2O, Na2O)
igneous
Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Amber (Black)
Amber (succinite, retinite, etc., specifically, heavily included/dark varieties)
Mineraloid
Schist
Mica Schist (primarily Muscovite and Quartz)
metamorphic
Milky Quartz (Quartz Vein)
Silicon Dioxide (SiO2)
mineral
Milky Quartz (or Iron-Stained Quartz)
Quartz (Silicon Dioxide, SiO2)
mineral
Rough Quartz Crystal in Matrix
Silicon Dioxide (SiO2)
mineral
Blue Agate (Tumbled and Dyed)
Silicon Dioxide (SiO2) with likely organic dyes
mineral
Chrysocolla
Chrysocolla (Cu,Al)2H2Si2O5(OH)4·nH2O
Mineral
Blue Quartzite
Quartzite with inclusions (often Dumortierite or Magnesio-riebeckite), SiO2
metamorphic
Mica Schist
Mica Schist (primarily Muscovite and Biotite phyllosilicates)
metamorphic
Blue Tiger's Eye (Hawk's Eye)
Silicified Crocidolite (Pseudomorph of Quartz after Crocidolite), SiO2
metamorphic
Tiger's Eye
Pseudomorph of quartz after crocidolite (SiO2 with iron inclusions)
metamorphic
Sandstone
Arenite (SiO2 based)
sedimentary
Hematite
Hematite (Iron(III) oxide, Fe2O3)
mineral
Geode (Calcite or Quartz)
Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3)
sedimentary
Blue Chalcedony
Silicon Dioxide (SiO2)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Rose Quartz
Silicon Dioxide with trace inclusions of dumortierite or titanium (SiO2)
mineral
Green Tourmaline (Verdelite)
Elbaite (Complex Borosilicate: Na(Li,Al)3Al6(BO3)3Si6O18(OH)4)
mineral
Yellow Quartz (Iron-Stained Quartz)
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz (Milky Quartz / Quartzite)
Silicon Dioxide (SiO2)
mineral
Specularite (Specular Hematite)
Iron Oxide (Fe2O3)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Ferruginous Quartz (Iron-stained Quartz)
Silicon Dioxide with Iron Oxide (SiO2 with traces of Fe2O3/FeO(OH))
mineral
Opalite
Synthetic Glass (Simulated Opal)
mineral
Rock Crystal Quartz Pebble
Silicon Dioxide (SiO2)
mineral