Green aventurine (likely)
Quartz, SiO₂, containing fuchsite mica or other green inclusions
mineral
Category
Sedimentary Rock Or Mineral (Depending On Origin And Purity)
Browse sedimentary rock or mineral (depending on origin and purity) specimens identified by the Rock Identifier community.
Learn about Sedimentary Rock Or Mineral (Depending On Origin And Purity) in the encyclopedia
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Green Fluorite
Calcium Fluoride (CaF2)
mineral
Sandstone (Quartzite-rich Pebble)
Arenite (primarily SiO2)
sedimentary
Ruby
Corundum (Al2O3:Cr)
gemstone
Tumbled jasper (likely polychrome or brecciated jasper)
Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide impurities
mineral
Sandstone (Water-worn Pebble)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Rounded gray-green beach cobble
Unidentified lithic cobble; exact rock type cannot be determined from the image
sedimentary
Sandstone (Quartzite Pebble)
Arenite (SiO2)
sedimentary
Coprolite
Fossilized Feces
fossil
Agate Geode
Silicon Dioxide (SiO2) - Variety Agate with Quartz crystal center
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Gold-bearing quartz fragment (probable native gold)
Native gold (Au) in quartz (SiO₂), identification uncertain from the photograph
mineral
Diamond
Diamond (pure Carbon, C)
mineral
Sandstone and Conglomerate pebbles
Sedimentary clastic rock
sedimentary
Banded Sandstone
Arenite with iron oxide banding
sedimentary
Turquoise cabochon ring
Turquoise — hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O
gemstone
Shale and Pebble Fragment
Sedimentary Rock (Mudstone/Shale with Silica Pebble)
sedimentary
Sandstone
Arenite (composed of SiO2, CaCO3, or iron oxides)
sedimentary
Green cabochon, likely dyed or imitation material
Undetermined; the image is insufficient to identify a mineral species
gemstone
Sandstone
Clastic Sedimentary Rock
sedimentary
Quartzwacke / Impure Sandstone
Arenite with minor lithic fragments (Silicon Dioxide matrix)
sedimentary
Gold Nugget
Gold (Au)
mineral
Iceland Spar (Optical Calcite)
Calcite (Calcium Carbonate, CaCO3)
mineral
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Breccia
Polymictic volcanic breccia (likely basaltic-andesitic matrix)
igneous
Gold Nugget
Gold (Au)
mineral
Faceted brown gemstone pendant, likely smoky quartz or champagne topaz
Probably quartz (SiO₂), smoky variety; alternatively topaz (Al₂SiO₄(F,OH)₂)
gemstone
Fossilized Dinosaur Skull (Tyrannosaurus rex)
Tyrannosaurus rex (permineralized fossil), rich in Hydroxylapatite/Silica
sedimentary
Possibly a polished pale-green gemstone cabochon (likely aquamarine or fluorite)
Undetermined from the image; aquamarine is blue-green beryl (Be₃Al₂Si₆O₁₈), while fluorite is CaF₂
gemstone
Likely quartz-rich pebbles
Quartz (SiO₂), possibly milky quartz or quartzite; identification is uncertain from the blurry image
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Sandstone (Pebble)
Sandstone (SiO2 with matrix/cement)
sedimentary
Sandstone or Limestone
Sedimentary Rock
Sedimentary
Chert (Chert Nodule with Chalky Cortex)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Anthracite Coal
Anthracite
sedimentary
Green Jade (Tumbled)
Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (NaAlSi2O6)
mineral
Unakite-like epidote–feldspar rock
Epidote + K-feldspar/plagioclase ± quartz; compositionally similar to unakite
metamorphic
Possible iron meteorite
Iron–nickel meteorite, commonly kamacite-taenite (Fe-Ni alloy)
meteorite
Sandstone
Sandstone (lithified sand)
sedimentary
Sandstone (Quartzite-rich)
Clastic sedimentary rock (SiO2 primary)
sedimentary
Breccia
Lithic breccia (angular rock fragments cemented in a finer matrix)
sedimentary
Green ring, likely jade
Jadeite (NaAlSi₂O₆) or nephrite (calcium-magnesium amphibole); image alone cannot distinguish them
gemstone