Flint
Silicon dioxide (SiO2)
sedimentary
Category
Antropogenic (Man Made)
Browse antropogenic (man made) specimens identified by the Rock Identifier community.
Learn about Antropogenic (Man Made) in the encyclopedia
View all →
Diamond
Carbon (C)
gemstone
Limestone
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Diamond
Carbon (C)
gemstone
Pallasite Meteorite
Pallasite (Stony-Iron Meteorite)
meteorite
Pearl (with Peridot)
Calcium carbonate (CaCO3) + Conchiolin; Peridot: Magnesium iron silicate (Mg, Fe)2SiO4
mineral
Sandstone
Sedimentary Rock (Quartz Sandstone)
sedimentary
Chert (varieties: Flint or Jasper)
Silicon dioxide (SiO2) / Microcrystalline Quartz
sedimentary
Diamond (Faceted)
Carbon (C)
gemstone
Raw Diamond
Carbon (C)
gemstone
Diamond (in jewelry setting)
Adamantine Carbon (C)
mineral
Chert (Chocolate or Brown Flint)
Chert (SiO2)
sedimentary
Chert (Flint/Chalcedony)
Silicon Dioxide (SiO2)
sedimentary
Sandstone (Red/Brown Variety)
Arenite (composed primarily of SiO2 with Fe2O3 iron oxide inclusions)
sedimentary
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Pyrite
Iron Sulfide (FeS2)
mineral
Greenstone / serpentinite carving
Serpentinite, chiefly serpentine-group minerals (antigorite, lizardite, or chrysotile); exact identification requires testing
metamorphic
Diamond
C (Native Carbon)
gemstone
Diamond
Natural Diamond (Carbon, C)
gemstone
Specular Hematite (Specularite)
Iron Oxide (Fe2O3)
mineral
Iron-stained quartz-rich breccia (probable)
Hydrothermal quartz–iron oxide breccia; mainly SiO₂ quartz with iron oxides/hydroxides (hematite/goethite)
igneous
Swirled Agate Bead
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (SiO2 principal)
sedimentary
Diamond (or Diamond Simulant)
Carbon (C)
mineral
Green Slag Glass
Amorphous Silica / Glassy Blast Furnace Slag
Mineraloid (Industrial byproduct)
Diamond (Cut Gemstone)
Natural Carbon (C)
gemstone
Diamond (as set in a metal alloy ring)
Diamond (Pure Carbon, C)
mineral
Quartz (Microcrystalline/Chert)
Silicon Dioxide (SiO2)
mineral
Pearls (likely freshwater cultured pearls)
Pearl: nacre, primarily aragonite (CaCO₃) with conchiolin
gemstone
Chert (Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Tumbled greenstone (likely serpentinite or green jasper)
Serpentinite, commonly dominated by serpentine-group minerals (Mg₃Si₂O₅(OH)₄); exact identification requires testing
metamorphic
Pearl (Biogenic Mineraloid)
Calcium carbonate (Aragonite) and Conchiolin, CaCO3
mineral
Coquina / Fossiliferous Limestone
Fossiliferous Limestone (Calcite, CaCO3)
sedimentary
Flint
Silicon Dioxide (SiO2) - Chert variety
sedimentary
Chert (variations include Flint/Novaculite)
Chert (formula: SiO2)
sedimentary
Chert (often called Flint for darker varieties)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
sedimentary
![Turquoise (Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]) — mineral](https://media.rockidentification.com/92ebc6b5-08ac-4229-a727-57a096ec7f2c-thumbnail.jpg)
Turquoise
Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]
mineral
Granodiorite with Quartz Veining
Granodiorite (containing Plagioclase Feldspar, Quartz, and Biotite/Hornblende) with Quartz (SiO2) veins
igneous
Granite
Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)
igneous
Polished serpentine pendulum
Serpentine-group minerals, chiefly antigorite/lizardite; approximate formula Mg₃Si₂O₅(OH)₄
metamorphic
Limestone
Calcium Carbonate (CaCO3)
sedimentary