Garnet Schist
Garnet-bearing Mica Schist (variety of compositions, often Al2SiO5 with X3Y2(SiO4)3)
metamorphic
Category
Mineral (Processed Alloy)
Browse mineral (processed alloy) specimens identified by the Rock Identifier community.
Greenschist (Greenstone)
Chlorite schist (primarily Chlorite-Epidote-Actinolite-Albite)
metamorphic
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) in Altered Host Rock
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Ironstone / Hematite
Iron(III) oxide (Fe2O3)
mineral
Granite
Granite (a felsic intrusive igneous rock)
Igneous Rock
Quartz on Matrix
Silicon Dioxide (SiO2)
mineral
Mixed rock and mineral collection
Unidentified assortment of geological specimens; individual species cannot be determined from the image
mineral
Small dark rock fragment (unidentified)
Undetermined; the image does not show enough detail for reliable identification.
igneous
Aventurine (Green)
Silicon Dioxide (Quartz with inclusions of Fuchsite)
metamorphic
Pink Granite
Granite (Phaneritic Acidic Igneous Rock)
igneous
Small gray rock fragment
Unidentified rock; the image lacks enough detail for reliable mineral identification
igneous
Quartz (River Pebble)
Silicon Dioxide (SiO2)
Mineral
Red Sandstone
Arenite (with Iron Oxide)
sedimentary
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions of Iron Oxide)
metamorphic
Pyrite on Quartz
Iron Sulfide (FeS2) on Silicon Dioxide (SiO2)
mineral
Pyrite and Fluorite on Quartz (Matrix Specimen)
Iron Disulfide (FeS2) and Calcium Fluoride (CaF2) with Silicon Dioxide (SiO2)
mineral
Copper Ore (with Azurite and Malachite)
Cuprite, Azurite (Cu3(CO3)2(OH)2), Malachite (Cu2(CO3)(OH)2)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxides)
metamorphic
Quartz with Iron Staining
Quartz (Silicon Dioxide, SiO2)
mineral
Olivine in Basalt (Peridotite Xenolith)
Forsterite-rich Olivine (Mg2SiO4) in Aphanitic Basalt
igneous
Mixed Rock and Mineral Collection
Various geological specimens
igneous, sedimentary, and metamorphic
Septarian Nodule (Dragon Stone)
Septarian concretion (composition: CaCO3 - Calcite, Aragonite, and Siderite/Limestone)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Unidentified small rock or mineral fragment
Indeterminate from the blurred image; possibly quartz-rich stone, feldspar, or weathered concrete-like geological material
mineral
Weathered iron-rich rock, possibly oxidized basalt or laterite
Indeterminate; likely iron-oxide-bearing mafic rock (basaltic composition)
igneous
Opalite
Synthetic Opalized Glass
gemstone
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Honey Calcite
Calcium Carbonate (CaCO3)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Shark Tooth Fossil
Carcharodonta (order Lamniformes), likely Carcharias spp.
fossil
Greenstone / Epidosite
Metamorphosed Mafic Igneous Rock (Epidote-Chlorite group)
metamorphic
Banded Quartz
Silicon Dioxide (SiO2)
mineral
Schist
Crystalline Schist (often containing Muscovite, Biotte, or Quartz)
metamorphic
Specular Hematite (Specularite)
Hematite (Fe2O3)
mineral
Fossil Shark Tooth
Chondrichthyes (Class)
fossil
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) vein cutting through host rock
mineral
Seashell Fossil
Gastropoda fossil
fossil
Yellow Jasper
Tectosilicates (SiO2) with Goethite/Iron oxide inclusions
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with Goethite/Iron inclusions
sedimentary