Granite (Pegmatitic)
Phaneritic Felsic Igneous Rock
igneous
Category
Mineraloid (Man Made Glass)
Browse mineraloid (man made glass) specimens identified by the Rock Identifier community.
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Bismuth Crystal
Bismuth (Bi)
mineral
Granite
Granite (a phaneritic intrusive igneous rock consisting mainly of quartz, alkali feldspar, and plagioclase)
igneous
Fossilized oyster shell
Bivalvia; likely an oyster (Ostreidae), partly mineralized with calcite
fossil
Crinoid Fossil in Limestone
Crinoid columnal (Class Crinoidea) in biomicrite
fossil
Industrial Slag
Anthropogenic Vitreous Slag
igneous
Nephrite Jade
Nephrite
Mineral/Rock
Bauxite
Bauxite (Al(OH)3, γ-AlO(OH), and α-AlO(OH))
sedimentary
Sandstone
Arenite
sedimentary
Coquina / Fossiliferous Limestone
Fossiliferous Limestone (Calcite, CaCO3)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Pearl
Calcium Carbonate (CaCO3) with Conchiolin
mineral
Chert (Yellow Jasper/Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Sunstone
Andesine-Labradorite Feldspar ((Ca,Na)(Al,Si)4O8)
mineral
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Petrified Wood (Silicified Wood)
Silicified Paleoflora (mainly Quartz, SiO2)
metamorphic
Chert (Nodule)
Chert (Alpha-Quartz, SiO2)
sedimentary
Chert (Jasper/Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Precious Coral
Corallium rubrum (Calcium carbonate with trace carotene)
Organic gemstone / Sedimentary mineraloid
Chert
Chert (microcrystalline quartz)
sedimentary
Diamond
Carbon (C)
gemstone
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Desert Rose (Gypsum Rose)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
mineral
Fossilized Shark Tooth (Sand Tiger)
Carcharias sp. (Fossilized Tooth)
fossil
Crinoid Stem Segment Fossil
Crinoidea (columnal ossicle)
fossil
Chert (Jasper type)
Microcrystalline Quartz (SiO2)
sedimentary
Malachite
Malachite (Copper Carbonate Hydroxide) - Cu2CO3(OH)2
Mineral
Pyrulite (Pyrite / Chalcopyrite)
Iron Sulfide (FeS2) or Copper Iron Sulfide (CuFeS2)
mineral
Chert (Jasper/Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Yooperlite (Syenite clast containing fluorescent Sodalite)
Sodalite-bearing Syenite
igneous
Banded Calcite or Travertine
Calcium Carbonate (CaCO3)
Sedimentary
Limestone
Calcareous sedimentary rock (CaCO3)
sedimentary
Sandstone (likely Fossilized Wood or Concrete Simulacrum)
Arenite / Silicified Wood / Anthropogenic Concrete
sedimentary
Hag Stone (Flint with natural hole)
Silicon Dioxide (SiO2) - Nodular Chert / Flint
sedimentary
Coquina
Coquina (Bioclastic Limestone)
sedimentary
Diamond Plate (Steel)
Alloyed Carbon Steel or Aluminum with 'Durbar' pattern
not a rock (Man-made industrial metal)
Asphalt Chunk (with aggregate)
Bituminous concrete / Anthropogenic conglomerate
sedimentary (anthropogenic/man-made conglomerate)
Green Aura Quartz (Titanium treated Kyanite or Quartz)
Silicon Dioxide (SiO2) or Aluminum Silicate (Al2SiO5) with Titanium/Metal Oxide coating
mineral (man-made aura treatment)
Chert (or Flint)
Chert (cryptocrystalline quartz), SiO2
Sedimentary
Granite (weathered pebble)
Granite (plutonic igneous rock)
Igneous
Quartz (Pebble)
Quartz (SiO₂)
Mineral
Chert (Brown Variety)
Microcrystalline Quartz (SiO2)
sedimentary