Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Category
Mineral (Metal)
Browse mineral (metal) specimens identified by the Rock Identifier community.
Chert (Jasper/Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Granodiorite
Granodiorite (containing Quartz, Plagioclase Feldspar, Biotite, and Hornblende)
igneous
Fluorite
Calcium Fluoride (CaF2)
mineral
Rhodochrosite
Manganese carbonate (MnCO3)
mineral
Mica Schist
Mica Schist (primarily Muscovite or Biotite KAl2(AlSi3O10)(OH)2)
metamorphic
Granitic Pegmatite
Granite Pegmatite (principally KAlSi3O8, SiO2, and KAl2(AlSi3O10)(OH)2)
igneous
Rhodonite
Rhodonite (Manganese Silicate), (Mn,Fe,Mg,Ca)SiO3
mineral
Diorite
Diorite (Intermediate intrusive igneous rock)
igneous
Jasper (specifically Polychrome or Desert Jasper)
Silicon Dioxide (SiO2) with iron oxide and other mineral impurities
sedimentary (chemical/biological origin)
Chrysocolla in Matrix
Hydrated copper phyllosilicate (Cu,Al)2H2Si2O5(OH)4' nH2O on Quartz/Feldspar matrix
mineral
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Tiffany Stone
Bertrandite (Be4Si2O7(OH)2) mixed with Fluorite (CaF2), Opal, and Chalcedony
mineral
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Diamond
Native Carbon (C)
mineral
Diamond (Princess Cut)
Carbon (C)
mineral
Garnet
Almandine formula: Fe3Al2(SiO4)3
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Orange Calcite (Banded Calcite)
Calcium Carbonate (CaCO3)
mineral
Blue Sapphire
Corundum (Al2O3) with traces of Iron and Titanium
mineral
Diamond (Colorless/White)
Carbon (C)
mineral
Blue Celestite (Celestine)
Strontium sulfate (SrSO4)
mineral
Druzy Quartz on Host Rock
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Granite
Phaneritic Plutonic Felsic Rock (SiO2, KAlSi3O8, NaAlSi3O8, CaAl2Si2O8)
igneous
Mica Schist
Mica Schist (KAl2(AlSi3O10)(OH)2 / K(Mg,Fe)3AlSi3O10(OH)2)
metamorphic
Connemara Marble
Ophiocalcite (Serpentinitic Marble)
metamorphic
Granite (Dioritic or Hornblende-rich)
Phaneritic Plutonic Felsic to Intermediate Igneous Rock
igneous
Sodalite
Sodalite (Na4Al3Si3O12Cl)
Mineral
Fluorite
Fluorite (Calcium Fluoride - CaF2)
mineral
Tiger's Eye (Rough)
Pseudomorph of Quartz after Crocidolite (SiO2 with FeOOH inclusions)
metamorphic
Peacock Ore
Bornite (Cu5FeS4)
mineral
Banded Gneiss (River Rock/Pebble)
Gneiss (specifically a banded variety, likely a orthogneiss or paragneiss depending on parent rock)
Metamorphic Rock
Micaceous Rock (likely Muscovite Schist/Gneiss or a Muscovite-rich Specimen)
Predominantly Muscovite (KAl2(AlSi3O10)(F,OH)2), often found in rocks like Muscovite Schist or Muscovite Gneiss.
Metamorphic, Mineral (within a rock type)
Mica Schist
Mica Schist (primarily Muscovite and Quartz composition)
metamorphic
Sandstone
Arenite
sedimentary
Sphalerite in Matrix (Polished Point)
Zinc sulfide (Zn,Fe)S
mineral
Sandstone
Arenite (mostly SiO2)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone (Pebble)
Arenite (primarily SiO2)
sedimentary
Shale
Shale (Consolidated fine-grained clay/silt)
sedimentary
Sandstone
Arenite (SiO2 principal)
sedimentary