Brecciated jasper, possibly rainforest jasper
Jasper: microcrystalline to cryptocrystalline quartz, SiO₂, commonly containing hematite, goethite, chlorite, epidote, and other iron- and manganese-bearing minerals
gemstone
Category
Sedimentary Rock (Possibly Composed Of Various Minerals)
Browse sedimentary rock (possibly composed of various minerals) specimens identified by the Rock Identifier community.
Learn about Sedimentary Rock (Possibly Composed Of Various Minerals) in the encyclopedia
View all →
Quartz (likely a macrocrystalline variety like milky quartz or smoky quartz, given the appearance in the image)
Quartz (SiO₂ - Silicon Dioxide)
Mineral
Sandstone (with Iron Staining)
Arenite (primarily SiO2 with Fe2O3/FeO(OH) oxides)
sedimentary
Gneiss
Foliated Metamorphic Rock (Gneiss)
metamorphic
Petrified Wood
Silicified wood (primarily quartz, SiO2)
fossil
Granite
Intrusive Igneous Rock
igneous
Quartz Pebble
Silicon dioxide (SiO2)
sedimentary
Selenite (Satin Spar)
Gypsum (CaSO4·2H2O)
mineral
Veined Limestone (Micrite) with Quartz/Calcite Veins
Calcium Carbonate (CaCO3) with Silicate or Carbonate inclusions
sedimentary
Gneiss
Gneiss
metamorphic
Ferruginous Sandstone (River Pebble)
Clastic Sedimentary Rock (Iron-rich)
sedimentary
Sandstone
Arenite
sedimentary
Chert Pebble
Chert (composed primarily of Microcrystalline Quartz, SiO2)
sedimentary
Quartz with Associated Minerals
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Rounded quartz-rich cobble, likely granite-derived stone
Granite or granitic gneiss, composed mainly of quartz, feldspar, and minor mica
igneous
Banded Gneiss
Gneiss (high-grade metamorphic silicate rock)
metamorphic
Sandstone / Chert Gravel
SiO2 (Silicon Dioxide based clastic sedimentary rock)
sedimentary
Desert Rose (Gypsum Rose)
Gypsum (CaSO4·2H2O) with inclusions of sand
mineral
Weathered iron-rich sandstone or conglomeratic sedimentary cobble
Ferruginous sandstone, possibly polymictic conglomerate
sedimentary
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Tektite
Natural impact glass
meteorite
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals like Antigorite, Lizardite, and Chrysotile)
metamorphic
Granite
Intrusive Igneous Rock
igneous
Rose Quartz
Silicon dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Gneissic Granite
Granite Gneiss
metamorphic
Aquamarine and clear quartz
Aquamarine (Be3Al2Si6O18), Quartz (SiO2)
Mineral
Tumbled dark stone, likely basalt or basaltic rock
Fine-grained mafic volcanic rock; commonly basalt, composed chiefly of plagioclase and pyroxene with possible olivine and iron oxides
igneous
Shark Tooth Fossil
Chondrichthyes (class) fossilized tooth
fossil
Limestone pebble
Sedimentary rock composed mainly of calcium carbonate (CaCO3)
sedimentary
Limestone
Sedimentary rock composed mainly of calcium carbonate (CaCO3)
sedimentary
Limestone
Sedimentary rock composed primarily of calcium carbonate (CaCO3)
sedimentary
Limestone
Sedimentary rock composed primarily of calcium carbonate (CaCO3)
sedimentary
Limestone
Sedimentary rock composed primarily of Calcium Carbonate (CaCO3)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Granite
Granite (a common type of Felsic Intrusive Igneous Rock)
Igneous Rock
Travertine
Travertine (CaCO3 - Calcium Carbonate)
sedimentary
Halite
Sodium Chloride (NaCl)
Mineral
Calcite on Matrix
Calcium Carbonate (CaCO3)
mineral
Quartz-rich granite or pegmatitic rock
Granite, composed mainly of quartz, feldspar, and mica; exact identification is uncertain from the photograph
igneous