Sandstone
Arenite (primarily SiO2)
sedimentary
Category
Metamorphic Rock (Specifically A Rock Composed Of Minerals)
Browse metamorphic rock (specifically a rock composed of minerals) specimens identified by the Rock Identifier community.
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Shale with Vein Infillings
Shale (a fine-grained clastic sedimentary rock). The veins could be Calcite (CaCO3), Quartz (SiO2), or other minerals.
Sedimentary Rock
Quartz
Silicon Dioxide (SiO2)
Mineral
Shale (Beach-worn)
Laminated Pelite (primarily clay minerals and quartz)
sedimentary
Sandstone (Ferruginous)
Arenite (composed primarily of SiO2 with Fe2O3 cement)
sedimentary
Sandstone (with Iron Staining)
Clastic sedimentary rock (SiO2 with Fe2O3 oxides)
sedimentary
Milky Quartz with Country Rock contact
Silicon Dioxide (SiO2) in contact with Metamorphic/Igneous rock
mineral
Pink Granite
Granite (Phaneritic Felsic Igneous Rock)
igneous
Agate (Grey Agate Slice)
Microcrystalline Quartz (SiO2)
mineral
Dragon Blood Jasper
Epidote with Red Jasper inclusions (SiO2 and Ca2(Al,Fe)3(SiO4)3(OH))
metamorphic
Yellow Quartzite (River Pebble)
Quartzite (SiO2)
metamorphic
River Rock (River Cobbles)
Fluvial Conglomerate Clasts (primarily composed of various minerals such as Quartz, SiO2)
sedimentary
Limonite-stained Quartz / Quartzite
Silicon Dioxide (SiO2) with iron hydroxides (FeO(OH)·nH2O)
sedimentary or metamorphic
Banded Sandstone
Arenite (composed primarily of Quartz: SiO2)
sedimentary
Black Tourmaline
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Schist
Mica Schist (primarily Muscovite or Biotite sheet silicates)
metamorphic
Serpentine
Antigorite, Lizardite, or Chrysotile (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4
metamorphic
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Dalmatian Jasper (Dalmatian Stone)
Peralkaline rhyolite
igneous
Serpentinite
Serpentinite (composed mainly of Group: Serpentine; (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4)
metamorphic
Granite
Granite
igneous
Peach Moonstone
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Granite
Phaneritic Felsic Igneous Rock
igneous
Quartz (variety of colors)
SiO2 (Silicon Dioxide)
Mineral
Banded Agate / Lace Agate
Agate (Silica/Quartz) - SiO2
mineral
Basalt (Drill Core)
Mafic Volcanic Rock (Basalt)
igneous
Basalt with Magnetite
Crystalline Basalt (Primarily Plagioclase and Pyroxene) with Magnetite (Fe3O4)
igneous
Pink Granite
Phaneritic Felsic Igneous Plutonic Rock
igneous
Greenschist
Greenschist facies rock (containing chlorite, actinolite, and epidote)
metamorphic
Gossan (Iron Hat)
Limonitic Gossan (predominantly FeO(OH)·nH2O)
igneous/metamorphic derivative
Basalt with Iron Oxidation (Lattice/Veined)
Mafic Volcanic Rock (principally Plagioclase and Pyroxene)
igneous
Sandstone
Clastic Sedimentary Rock (composed of SiO2 grains)
sedimentary
Basalt
Mafic extrusive volcanic rock (composed primarily of Plagioclase feldspar and Pyroxene)
igneous
Granite
Phaneritic intrusive felsic igneous rock
igneous
Quartzite River Pebble
Quartzite (primarily Silicon Dioxide, SiO2)
metamorphic
Fossil Coral
Scleractinia (fossilized calcium carbonate)
sedimentary
Agate
Agate (Silicon Dioxide, SiO2)
mineral
Quartz (Pebble)
Quartz (SiO₂)
Mineral
Basalt with Granite Inclusions (Xenoliths)
Mafic igneous rock (Basalt) with Sialic minerals
igneous
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Quartzite with Hematite
Metamorphosed Quartz Sandstone (SiO2 with Fe2O3 inclusions)
metamorphic