Asphalt / Bituminous Aggregate
Bituminous mixture (Hydrocarbon-based sediment)
sedimentary
Category
Igneous, Sedimentary, Or Metamorphic (Mineral Based)
Browse igneous, sedimentary, or metamorphic (mineral based) specimens identified by the Rock Identifier community.
Learn about Igneous, Sedimentary, Or Metamorphic (Mineral Based) in the encyclopedia
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Sandstone (Red Sandstone)
Arenite (SiO2 based with Fe2O3 staining)
sedimentary
Quartz
Silicon dioxide (SiO2)
mineral
Banded Calcite (Green Onyx)
Calcium Carbonate (CaCO3)
sedimentary
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Magnetite Sand (Black Sand)
Magnetite (Fe3O4)
mineral
Gneissic Granite
Granite Gneiss
metamorphic
Pyrite
Iron Pyrite (FeS2)
mineral
Limonite
Limonite (Hydrated iron(III) oxide-hydroxide) FeO(OH)·nH2O
mineral
Sandstone (Ferruginous)
Arenite (Fe-rich)
sedimentary
Hematite (likely Botryoidal or Specularite variant)
Iron(III) oxide (Fe2O3)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Greenschist (Chlorite Schist)
Greenschist (Metamorphic rock dominated by chlorite, actinolite, and epidote)
metamorphic
Blue Aventurine
Silicon Dioxide (SiO2) with inclusions of Dumortierite
Mineral (silicate variety)
Gravel or Pebble
Clastic Sedimentary Grain (typically composed of Quartz or Silicate minerals)
sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Mica Schist
Mica Schist (primarily Muscovite and Biotite)
metamorphic
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Mossy Rock
Mixed lithology rock with Bryophyta (moss)
sedimentary
Feldspar
KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8 (Feldspar group)
mineral
Greenstone / Epidosite
Epidosite (primary minerals: Epidote and Quartz)
metamorphic
Labradorite
Plagioclase Feldspar (Na,Ca)(Al,Si)4O8
mineral
Likely banded gneiss
Gneiss (quartz–feldspar–mica-rich rock; exact identification uncertain from the photo)
metamorphic
Banded gneiss
Quartz–feldspar gneiss, possibly biotite-bearing; exact identification requires testing
metamorphic
Stream-worn greenstone (likely serpentinite or altered basalt)
Serpentinite, chiefly serpentine-group minerals; possibly chlorite–actinolite greenstone
metamorphic
Quartz (Small Fragment)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Raw Chunk)
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Blue Apatite
Fluoroapatite (Ca5(PO4)3F)
mineral
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Clear Quartz
Silicon dioxide (SiO2)
mineral
Rough amber-colored quartz or calcite fragment
Likely quartz (SiO₂) or calcite (CaCO₃); exact identification requires testing
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Mixed Rock Collection (Pebbles and Stones)
Various geological specimens
igneous, sedimentary, and metamorphic
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Granular)
Silicon Dioxide (SiO2)
mineral
Conglomerate
Clastic sedimentary rock (Puddingstone)
sedimentary
![Fossilized bone fragment (probable mammalian tooth or bone) (Mineralized bone, commonly hydroxyapatite [Ca5(PO4)3(OH)] replaced or impregnated by silica/calcite) — fossil](https://media.rock.id/fossilized-bone-fragment-probable-6435bbec-570b-407e-9c9f-870b904b8d23-thumbnail.jpg)
Fossilized bone fragment (probable mammalian tooth or bone)
Mineralized bone, commonly hydroxyapatite [Ca5(PO4)3(OH)] replaced or impregnated by silica/calcite
fossil