Quartz pebble
Silicon Dioxide (SiO2)
mineral
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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Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Quartz (Milky or Smoky Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz with inclusions
Silicon Dioxide (SiO2)
mineral
Unakite
Unakite (Metasomatized Granite)
metamorphic
Sand Grain (Silica/Quartz Grain)
Silicon Dioxide (SiO2)
sedimentary
Garnet (Almandine/Pyrope series)
Silicate mineral (Almandine: Fe3Al2Si3O12; Pyrope: Mg3Al2Si3O12)
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
N/A (The provided image is a storyboard/digital document)
N/A
Milky Quartz with inclusions
Quartz (Silicon Dioxide, SiO2)
mineral
Garnet
Almandine Garnet (Fe3Al2(SiO4)3)
mineral
Azurite-Malachite (often called Azerite Malachite or Azurmalachite)
Azurite (Cu3(CO3)2(OH)2) and Malachite (Cu2CO3(OH)2)
Mineral
Glauconitic Sandstone (Greensand)
Glauconitic Quartz Arenite (Formula: (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2)
sedimentary
Biotite Schist
Biotite-rich Schist (K(Mg,Fe)3AlSi3O10(OH,F)2)
metamorphic
Quartz Druzy on Agate (River Cobble)
Silicon Dioxide (SiO2)
Mineral / Sedimentary (often associated with volcanic hosts)
Tiger Iron
Tiger Iron (composite of Tiger's Eye, Red Jasper, and Hematite)
metamorphic
Pyrite (Iron Pyrite)
Iron Sulfide (FeS2)
mineral
Bornite
Bornite (Cu5FeS4)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Sandstone (Quartzose Sandstone)
Arenite (primarily SiO2)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Bornite (Peacock Ore)
Bornite (Cu5FeS4)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Magnetite (likely with weathered Limonite/Hematite)
Magnetite (Fe3O4) with iron oxide weathering
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Marble
Recrystallized Carbonate Rock (CaCO3)
metamorphic
Marble
Recrystallized Calcite (CaCO3)
metamorphic
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.
Fossilized Shark Tooth
Fossilized elasmobranch tooth (Apatite/Calcium Phosphate)
sedimentary
Dinosaur Fossil (Tyrannosaurus rex skull replica/specimen)
Tyrannosaurus rex (fossilized in permineralized sedimentary matrix)
sedimentary
Red Quartz
Silicon Dioxide (SiO2) with Hematite inclusions
mineral
Desert Rose
Gypsum (CaSO4·2H2O) or Baryte (BaSO4) with trapped sand grains
mineral
Galena
Lead(II) sulfide (PbS)
mineral
Glacial Cobbles (predominantly Granite and Gneiss)
Mixed lithologies (Quartz, Feldspar, Mica assemblage)
igneous and metamorphic
Chrysocolla
Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O)
mineral