Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)
mineral
Category
Mineral (Processed Alloy)
Browse mineral (processed alloy) specimens identified by the Rock Identifier community.
Prehnite
Calcium aluminum silicate hydroxide - Ca2Al(AlSi3O10)(OH)2
mineral
Celestite (Celestine)
Strontium sulfate (SrSO4)
mineral
Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Mica schist
Mica schist (Muscovite and Biotite group)
metamorphic
Sandstone (likely Calcareous or Micaceous)
Clastic sedimentary rock (primarily Quartz with Cementing Agents)
sedimentary
Asphalt Concrete (Bituminous Conglomerate)
Anthropogenic Bituminous Conglomerate
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Specular Hematite (Specularite) in Matrix
Specularite (Fe2O3)
mineral
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Turquoise and Hematite
CuAl6(PO4)4(OH)8·4H2O (Turquoise) and Fe2O3 (Hematite)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Granite
Granite (Phaneritic igneous rock)
igneous
Garnet Schist
Garnetiferous Mica Schist
metamorphic
Black Tourmaline
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Agate (Banded Chalcedony)
Agate (Silicon Dioxide, SiO2)
mineral
Yellow Quartz (Citrine/Yellow Jasper)
Silicon Dioxide (SiO2)
mineral
Mica Schist
Schist (Crystalline metamorphic rock)
metamorphic
Banded Chert (River Pebble)
Microcrystalline Quartz (SiO2)
sedimentary
Slag Glass
Vitreous Silicate Residue
industrial byproduct (anthropogenic rock)
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
Granite (Fine-grained)
Phaneritic Felsic Igneous Rock
igneous
Not a geological specimen
N/A (man-made object)
N/A
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
Copper Ore (with Azurite and Malachite)
Cuprite, Azurite (Cu3(CO3)2(OH)2), Malachite (Cu2(CO3)(OH)2)
mineral
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Gold Ore
Gold-bearing Quartz (Native Gold, Au)
mineral
Granite
Granite (Phaneritic Igneous Rock / Quartz, Feldspar, Mica)
igneous
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
Gold Ore (Auriferous Quartz with Chalcopyrite/Pyrite)
Au (Native Gold) in Quartz (SiO2) with FeS2 (Pyrite) or CuFeS2 (Chalcopyrite)
Mineral
Bauxite
Bauxite (Al2O3·nH2O)
sedimentary
Fossilized Shark Tooth
Scapanorhynchus (Sand Tiger Shark relative)
sedimentary
Quartz
Silicon Dioxide (SiO2)
Mineral