Agate Nodule / Weathered Chert
SiO2 (Silicon Dioxide - Microcrystalline Quartz)
Sedimentary / Mineral
Category
Sedimentary Like (Industrial Composite)
Browse sedimentary like (industrial composite) specimens identified by the Rock Identifier community.
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Painted Sandstone Cobble
Clastic Sedimentary Rock (Sandstone base)
sedimentary
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
mineral
Polished banded stone, likely zebra jasper
Zebra jasper (banded microcrystalline quartz, chiefly SiO₂, with iron-oxide and carbonate impurities)
metamorphic
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Bauxite
Bauxite (Al(OH)3, AlO(OH))
sedimentary
Sandstone
Arenite (SiO2 principal component)
sedimentary
Ironstone (likely Limonite or Goethite)
Ferruginous sedimentary rock (FeO(OH)·nH2O)
sedimentary
Green Glass Slag
Amorphous Silicon Dioxide (SiO2) with metal oxide impurities
mineraloid (man-made)
Red Jasper
Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) containing Iron Oxide inclusions
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Chert (Jasper/Mudstone variant)
Silicon Dioxide (SiO2)
sedimentary
Limestone (or Calcite Pebble)
Calcium Carbonate (CaCO3)
sedimentary
Greywacke
Dirty Sandstone (Lithic wacke)
sedimentary
Polished howlite bead
Howlite, a hydrous calcium borosilicate hydroxide: Ca₂B₅SiO₉(OH)₅
mineral
Oolitic Ironstone
Sedimentary Ooidal Ironstone (Limonite/Hematite mixture)
sedimentary
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Chert (specifically Red Chert or Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Nodule)
Silicon Dioxide (SiO2)
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Chalk (Limestone)
Calcium Carbonate (CaCO3)
sedimentary
Kyanite in Quartz
Kyanite (Al2SiO5) with Quartz (SiO2)
metamorphic
Quartz Pebble
Crystalline Silica (SiO2)
sedimentary
Small dark mineral fragment, possibly mica or a metallic sulfide
Unidentified from image; possible biotite mica or iron sulfide (pyrite-group)
mineral
Sandstone
Arenite (SiO2 principal)
sedimentary
Schist
Mica Schist
metamorphic
Fossiliferous Limestone
Fossiliferous Calcarenite (CaCO3)
sedimentary
Jasper
Silicon Dioxide (SiO2)
sedimentary
Polished turquoise (likely stabilized)
Turquoise — hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O
mineral
Limonite (Iron Ore)
Limonite (mixture of hydrated iron(III) oxide-hydroxides)
Mineral
Chert / Jasper
Silicon Dioxide (SiO2)
sedimentary
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Polymictic breccia, possibly volcanic breccia
Polymictic clastic breccia; likely a matrix-supported breccia containing lithic fragments, quartz, feldspar, and dark mafic minerals
sedimentary
Unakite
Altered Granite (Epidotized Granite)
metamorphic
Moon (lunar surface depiction)
Lunar rock; chiefly anorthosite, basalt, and breccia (plagioclase-rich CaAl2Si2O8)
meteorite
Chert (var. Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone (Pebble)
Arenite (primarily SiO2)
sedimentary
Possible iron-rich chert or slag-like rock
Microcrystalline quartz (SiO₂), possibly iron-stained chert; exact identification is uncertain from the image
sedimentary
Sandstone (Quartzose Sandstone)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Zircon
Zircon (Zirconium Silicate - ZrSiO4)
mineral