Quartzite
Quartzite (Primary mineral: SiO2)
metamorphic
Category
Mineral Precipitate (Anthropogenic Context)
Browse mineral precipitate (anthropogenic context) specimens identified by the Rock Identifier community.
Learn about Mineral Precipitate (Anthropogenic Context) in the encyclopedia
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Red Jasper
Jasper (Silicate mineral - SiO2)
sedimentary
Abalone Shell (Nacre)
Aragonite (CaCO3) - Biogenic Mineral
mineral
Fossilized Shark Tooth (Otodus obliquus)
Otodus obliquus (Mineral: Fluorapatite)
mineral
Aventurine (Tan/Cream colored)
Quartz (SiO2) with mineral inclusions
mineral
Quartzite
Quartzite (Primary mineral: SiO2)
metamorphic
Quartzite
Quartzite (Primary mineral: SiO2)
metamorphic
Quartzite
Quartzite (Primary mineral: SiO2)
metamorphic
Milky Quartz (Gold-bearing Prospecting Specimen)
Silicon Dioxide (SiO2)
mineral
Grey River Stone (Gneiss/Schist mix)
Foliated Metamorphic Rock (variable mineral formula)
metamorphic
Feldspar
KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8
mineral
Orbicular Jasper (Ocean Jasper variant)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Mica Schist
Mica Schist (predominantly Muscovite or Biotite sheet silicates)
metamorphic
Quartz Vein in Schist
Quartz (SiO2) in Mica Schist
metamorphic
Chalcedony Nodule (Commonly known as Agate or Chert)
Microcrystalline Quartz (SiO2)
mineral
Epidote in Basalt
Epidotized Basalt (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH) in Mafic Igneous Host)
igneous
Yellow Jade (often Serpentine or Dolomite)
Primarily Serpentine (Mg3Si2O5(OH)4) or Dolomite (CaMg(CO3)2), though the term 'yellow jade' is also sometimes applied to varieties of true nephrite or jadeite.
Mineral, often a rock given its aggregate nature
Pink Granite
Phaneritic Felsic Plutonic Rock (Granite)
igneous
Quartz Druzy on Matrix (with Copper Mineralization)
Silicon Dioxide (SiO2) with Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·n H2O)
mineral
Pebble (likely Sandstone or Granitic Pebble)
Clastic Sediment (or specific rock type, e.g., Arenite, Granitoid Pebble)
Rock (likely Sedimentary)
Sunstone
Plagioclase Feldspar (Na,Ca)(Al,Si)4O8
mineral
Gold Ore in Quartz
Auriferous Quartz (SiO2 with Au inclusions)
mineral
Chert (Jasper variety)
Microcrystalline Quartz (SiO2)
sedimentary
Lepidolite on Pegmatite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2) in Granitic Pegmatite
igneous
Basalt
Basalt
igneous
Beads (likely glass or man-made material)
N/A (artificial material)
Man-made material, not a natural rock or mineral specimen
Granitic Pegmatite
Granitic Pegmatite (principally Quartz, Potassium Feldspar, and Mica)
igneous
Marble (Sculculpted)
Metamorphosed Limestone (primarily CaCO3)
metamorphic
Epidote
Epidote - Ca2(Al,Fe)3(SiO4)3(OH)
metamorphic
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Marble
Recrystallized Calcite (CaCO3) or Dolomite (CaMg(CO3)2)
metamorphic
Marble
Recrystallized Calcite Rock (CaCO3)
metamorphic
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
Mineral
Lapis Lazuli (Simulated)
Lapis Lazuli (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2
metamorphic
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Fossilized Shark Tooth (Otodus)
Otodus sp. (calcium phosphate/hydroxylellite)
sedimentary
N/A (Non-Geological Specimen)
N/A