Schist
Schist
metamorphic
Category
Minerals
Browse minerals specimens identified by the Rock Identifier community.
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Limonite Sandstone
Ferruginous Sandstone (Hydrated Iron Oxide)
sedimentary
Greenstone
Metamorphosed Mafic Igneous Rock
metamorphic
Pyrite in Matrix (Gold-colored Chalcopyrite or Pyrite)
Iron Sulfide (FeS2) / Copper Iron Sulfide (CuFeS2)
mineral
Limonite (Ironstone Concretion)
Hydrous ferric oxides (FeO(OH)·nH2O)
mineral
Limonite
Limonite (Hydrous iron oxides, predominantly Goethite FeO(OH)·nH2O)
mineral
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Quartz with inclusions (likely Chlorite or Hornblende) and country rock
SiO2 (Quartz) with associated ferromagnesian minerals
Mineral/Igneous/Metamorphic association
Shale
Shale
sedimentary
Planet Earth
Gaia (Silicate Terrestrial Planet)
metamorphic
Chalcopyrite in Quartz (Gossan/Iron Hat)
CuFeS2 (Chalcopyrite) with SiO2 (Quartz)
mineral
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Pink Feldspar
Potassium Feldspar (KAlSi3O8)
mineral
Granite Pebble
Granite
igneous
Septarian (Dragon Stone)
Septarian Nodule (Aragonite, Calcite, Limestone)
sedimentary
Granite Pebble
Granite (Felsic intrusive igneous rock)
igneous
Basalt with Olivine (Peridot)
Basalt containing (Mg,Fe)2SiO4
igneous
Magnetite / Hematite rich ore
Magnetite (Fe3O4) or Hematite (Fe2O3)
mineral
Granite or Granodiorite (weathered fieldstone)
Granitoid
igneous
Azurite and Malachite
Copper Carbonates: Cu3(CO3)2(OH)2 (Azurite) and Cu2CO3(OH)2 (Malachite)
mineral
Limonite / Ironstone
Hydrated ferric oxide (FeO(OH)·nH2O)
mineral
Fossil Coral
Fossilized Scleractinia or Tabulata (various genera/species)
Sedimentary
Quartz with Mica inclusions (Pegmatite)
Silicon Dioxide (SiO2) with Muscovite/Biotite inclusions
igneous
Green Aventurine and Clear Quartz
Aventurine (variety of Quartz - SiO2) and Quartz (SiO2)
Mineral
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Limonite (Iron Ore)
Hydrated ferric oxide mixture (FeO(OH)·nH2O)
sedimentary
Schist
Mica Schist
metamorphic
Copper Ore (likely Malachite or Chrysocolla staining)
Copper Secondary Mineral (e.g., Cu2CO3(OH)2)
mineral
Diorite
Diorite (intermediate intrusive igneous rock)
igneous
Granite
Granite (High-silica plutonic rock)
igneous
Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Gneiss with Orthoclase Feldspar
Gneissic Metamorphic Rock with K-Feldspar inclusions
metamorphic
Ruby (varieties of Corundum)
Aluminum oxide (Al2O3) with Chromium traces
mineral
Schist
Schist
Metamorphic
Schist
Mica Schist
metamorphic
Schist
Schist (various mineralogical compositions including mica, chlorite, talc, etc.)
Metamorphic
Banded Gneiss (Variety of Gneiss)
Gneiss (specifically, a variety exhibiting prominent banding; mineral composition can vary, but often contains quartz, feldspar, mica, and amphibole)
Metamorphic Rock
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
mineral
Granite
Phaneritic plutonic rock (SiO2 rich)
igneous
Granite (Phaneritic Igneous Rock)
Granite
igneous
Granite Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Beryl (likely Emerald or Aquamarine in matrix)
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral