Banded Chert (River Pebble)
Microcrystalline Quartz (SiO2)
sedimentary
Category
Mineral (Processed Metal)
Browse mineral (processed metal) specimens identified by the Rock Identifier community.
Garnet Schist
Garnet-bearing Mica Schist (variety of compositions, often Al2SiO5 with X3Y2(SiO4)3)
metamorphic
Greenschist (Greenstone)
Chlorite schist (primarily Chlorite-Epidote-Actinolite-Albite)
metamorphic
Lapis Lazuli
Lapis Lazuli (Rock composed primarily of Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Calcite, and Pyrite)
metamorphic
Fluorite
Calcium Fluoride (CaF2)
mineral
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Septarian Nodule (Dragon Stone)
Septarian concretion (composition: CaCO3 - Calcite, Aragonite, and Siderite/Limestone)
sedimentary
Quartz (River Pebble)
Silicon Dioxide (SiO2)
Mineral
Seashell Fragment (Aragonite/Calcite)
Calcium Carbonate (CaCO3) - Shell fragment
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Ironstone Concretion (Moqui Marble type)
Ferruginous Concretion (Fe2O3 / FeO(OH))
sedimentary
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions of Iron Oxide)
mineral
Quartz with Pyrite inclusions
Silicon Dioxide (SiO2) with Iron Sulfide (FeS2)
mineral
Bauxite
Bauxite (Al2O3·nH2O)
sedimentary
Fossilized Shark Tooth
Scapanorhynchus (Sand Tiger Shark relative)
sedimentary
Quartz
Silicon Dioxide (SiO2)
Mineral
Blue Slag Glass
Amorphous Silica (Industrial byproduct)
Antropogenic (Man-made glass byproduct)
Specular Hematite (Specularite)
Iron(III) oxide (Fe2O3)
mineral
Marble
Recrystallized Calcite (CaCO3) Rock
metamorphic
Schist (Garnet-Mica Schist)
Garnet-Mica Schist (X-Y)3Z2(SiO4)3
metamorphic
Honey Calcite
Calcium Carbonate (CaCO3)
mineral
Sandstone (Quartz-rich)
Arenite (SiO2 based)
sedimentary
Sandstone (Water-worn Pebble)
Clastic sedimentary rock (primarily SiO2)
sedimentary
White Marble
Recrystallized Calcite (CaCO3)
metamorphic
Breciated Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Rose Quartz
Silicon Dioxide with trace inclusions (SiO2)
mineral
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Blue Quartz (Aventurine)
Silicon Dioxide (SiO2) with fibrous inclusions (commonly Dumortierite)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Garden Quartz (Lodolite)
Quartz with inclusions (SiO2 + various inclusions such as Chlorite, Hematite, or Feldspar)
mineral
Banded Gneiss
Gneiss
metamorphic
Serpentine
Serpentinite (rock) containing serpentine minerals (e.g., Antigorite, Lizardite, Chrysotile)
Metamorphic rock
Green Aventurine
Aventurine Quartz (SiO2 with inclusions of Fuchsite mica)
metamorphic
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Orange Calcite point
Calcite (Calcium Carbonate, CaCO3)
mineral
Magnetite (Small Granule)
Magnetite (Fe3O4)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)
metamorphic
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 cement)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Blue Quartzite
Quartzite (silicon dioxide, SiO2)
metamorphic
Petrified Wood
Silicified Wood (SiO2 as Quartz/Chert/Chalcedony)
sedimentary
Agate (specifically a Yellow/Honey Agate)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral