Asphalt (Bituminous pavement)
Bituminous concrete / Asphalt
Sedimentary (Anthropogenic)
Category
Mineral (Occurring As A Rolled Clast)
Browse mineral (occurring as a rolled clast) specimens identified by the Rock Identifier community.
Asphalt (Bituminous Pavement Bit)
Bitumen-bound aggregate (Petrochemical-bound composite)
sedimentary (anthropogenic/technogenic)
Chert / Flint
Silicon Dioxide (SiO2)
sedimentary
Jasper
Silicon dioxide (SiO2)
sedimentary
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Jasper (Iron-rich)
Silicon Dioxide (SiO2) with Hematite (Fe2O3) impurities
sedimentary
Jasper
Silicon Dioxide (SiO2) with iron oxide impurities
sedimentary
Banded Agate (specifically Carnelian Agate)
Silicon Dioxide (SiO2) - Chalcedony variety
mineral
Chert (Flint)
Microcrystalline quartz (SiO2)
sedimentary
Hematite Beads
Hematite (Fe2O3)
Mineral
Slag Glass (Cullet)
Amorphous Silica / Glass residue
Man-made byproduct (Non-geological)
Granite (Weathered/Oxidized)
Phaneritic Felsic Igneous Rock (composed of Quartz, Orthoclase Feldspar, and Mica)
igneous
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Rose Quartz
Silicon Dioxide with trace inclusions of dumortierite or titanium (SiO2)
mineral
Orange Quartz
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Asphalt
Asphalt concrete (engineered material, not a naturally occurring rock/mineral in this form)
Sedimentary
Chert (Chalcedony)
Silicon Dioxide (SiO2)
sedimentary
Chert (and Jasper variety)
Microcrystalline Quartz (SiO2)
sedimentary
Quartz (pebble)
Quartz (SiO₂)
Mineral
Chert (often called Flint when dark or found in chalk)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Hag Stone
Perforated Sandstone (composed of SiO2 and calcareous cement)
sedimentary
Opalite
Synthetic Opalised Glass
Mineral (Synthetic / Man-made)
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide impurities
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with iron hydroxides (Goethite)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Serpentine
Serpentine Group (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4
metamorphic
Fluorite (Purple variety)
Calcium Fluoride (CaF2)
mineral
Turquoise (Blue Howlite imitation)
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Chert (specifically Flint)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Lunar Highlands Breccia (Meteorite)
Lunar Feldspathic Breccia
igneous
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Chert (specifically Black Chert / Flint)
Silicon Dioxide (SiO2)
sedimentary
Lavender Agate / Chalcedony Sphere
Agate (Microcrystalline Quartz) - SiO2
mineral
Limonite (Iron Ore)
Limonite (Hydrated iron oxide - FeO(OH)·nH2O)
mineral
Turquoise
Hydrated phosphate of copper and aluminum (CuAl6(PO4)4(OH)8·4H2O)
mineral
Granite
Phaneritic Felsic Igneous Rock
igneous
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Anthracite Coal
Low-grade metamorphic carbonaceous rock
metamorphic
Jasper (Red Jasper)
Silicon Dioxide (SiO₂)
sedimentary
Gossan (Iron Hat)
Limonitic Gossan (Fe-oxide/hydroxide complex)
igneous
Chert (specifically Flint or Gray Chalcedony)
Microcrystalline Quartz (SiO2)
sedimentary
Malachite or Chrysocolla on Host Rock
Cu2(CO3)(OH)2 (Malachite) or (Cu,Al)2H2Si2O5(OH)4 (Chrysocolla)
mineral