Garnet (Almandine/Pyrope series)
Silicate mineral (Almandine: Fe3Al2Si3O12; Pyrope: Mg3Al2Si3O12)
mineral
Category
Mineral (Tectosilicate)
Browse mineral (tectosilicate) specimens identified by the Rock Identifier community.
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Gabbro (likely with Pyrite/Sulfide mineralization)
Mafic Intrusive Igneous Rock
igneous
Conglomerate
Conglomerate (a clastic sedimentary rock)
Sedimentary Rock
Vesicular Basalt with Calcification
Vesicular Basalt (Aphanitic extrusive igneous rock)
igneous
Metallic Ornament / Jewelry
N/A - This is an artificial object, not a geological specimen.
This appears to be a man-made metallic object, likely jewelry, not a natural rock, mineral, or geological specimen.
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Fossilized Dinosaur Skull (Tyrannosaurus rex)
Tyrannosaurus rex (permineralized fossil), rich in Hydroxylapatite/Silica
sedimentary
Dinosaur Fossil (Tyrannosaurus rex skull replica/specimen)
Tyrannosaurus rex (fossilized in permineralized sedimentary matrix)
sedimentary
Fossilized Shark Tooth
Fossilized elasmobranch tooth (Apatite/Calcium Phosphate)
sedimentary
Chrysocolla in Matrix
Hydrated copper silicate - (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Fossil Shark Tooth
Otodus sp. or Carcharocles sp. (likely fossilized Chondrichthyes)
fossil
Fossil Coral
Fossilized Scleractinia or Tabulata (various genera/species)
Sedimentary
Greenschist
Greenschist (containing Chlorite, Epidote, and Actinolite)
metamorphic
Sandstone (likely Arkosic or Quartzose)
Arenite (SiO2 based with mineral inclusions)
sedimentary
Quartz with Chalcopyrite
Silicon Dioxide (SiO2) with Copper Iron Sulfide (CuFeS2)
mineral
Schist
Schist
Metamorphic
Olivine (Peridot when gem-quality)
Olivine Group (Magnesium Iron Silicate, (Mg,Fe)2SiO4)
mineral
Quartz with mica and feldspar (Pegmatite fragment)
Granitic Pegmatite (composed mainly of SiO2 with KAlSi3O8)
igneous
Schist
Schist
metamorphic
Milky Quartz with inclusions
Quartz (Silicon Dioxide, SiO2)
mineral
Garnet
Almandine Garnet (Fe3Al2(SiO4)3)
mineral
Fossilized Shark Tooth
Carcharocles sp. or similar (Fossilized Fluorapatite)
sedimentary
Fossilized Shark Tooth (Otodus)
Otodus obliquus
fossil
Pyrite and Fluorite on Quartz (Matrix Specimen)
Iron Disulfide (FeS2) and Calcium Fluoride (CaF2) with Silicon Dioxide (SiO2)
mineral
Fluorite (Purple variety)
Calcium Fluoride (CaF2)
mineral
Baryte (Barite)
Barium sulfate (BaSO4)
mineral
Glacial Cobbles (predominantly Granite and Gneiss)
Mixed lithologies (Quartz, Feldspar, Mica assemblage)
igneous and metamorphic
Granite
Granite (Phaneritic igneous rock)
igneous
Blue Kyanite
Kyanite (Al2SiO5)
metamorphic
Granite
Granitoid (comprised of Quartz, Feldspar, and Mica)
igneous
Beryl (Emerald Variety)
Beryllium aluminum silicate (Be3Al2(SiO3)6)
mineral
Rough Quartz (with Feldspar inclusions)
Silicon Dioxide (SiO2)
Mineral
Sapphirine in Matrix
Sapphirine (Mg,Al)8(Al,Si)6O20
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Bornite
Bornite (Cu5FeS4)
mineral
Greenschist
Chlorite Schist
metamorphic
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Blue Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral
Indigo Gabbro
Gabbro (MaFIC intrusive rock)
igneous
Quartz (Fieldstone/Pebble)
Silicon Dioxide (SiO2)
mineral
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral