Conglomerate (Red Sandstone variety)
Clastic Sedimentary Rock (Conglomeratic Sandstone)
sedimentary
Category
Metamorphic (Likely Gneiss Or Schist Based On Texture)
Browse metamorphic (likely gneiss or schist based on texture) specimens identified by the Rock Identifier community.
Learn about Metamorphic (Likely Gneiss Or Schist Based On Texture) in the encyclopedia
View all →
Breccia
Clastic Breccia
sedimentary
Weathered granite or granitic gneiss
Granite; chiefly quartz, feldspar, and mica (possibly gneissic if foliation is confirmed)
igneous
Basalt (Crushed Roadstone)
Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)
igneous
Emerald in Matrix
Emerald (Beryllium Aluminum Silicate - Be3Al2(SiO3)6)
mineral
Granite
Granite (Felsic Plutonic Rock)
igneous
Rough Tanzanite
Zoisite (Ca2Al3(SiO4)3(OH))
mineral
Iron-stained quartz-rich rock, likely quartzite or silicified breccia
Quartz (SiO₂), possibly quartzite with limonite/goethite iron oxides
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Sandstone
Sandstone (composed predominantly of Quartz, SiO2, with Feldspar and Clay minerals)
sedimentary
Quartzite (Yellow/Iron-stained Quartz)
Quartzite (primarily SiO2 with iron oxide impurities)
metamorphic
Black Tourmaline (Schorl)
Schorl (NaFe2+3Al6(BO3)3Si6O18(OH)4)
mineral
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite (mica)
Mineral (variety of Quartz)
Basalt (Weathered Pebble)
Extrusive mafic igneous rock; minerals primarily Plagioclase feldspar and Pyroxene
igneous
Nephrite Jade (River Cobble)
Nephrite (Silicate mineral: Ca2(Mg, Fe)5Si8O22(OH)2)
metamorphic
Yellow Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Beryl (Emerald Variety)
Beryllium Aluminum Silicate (Be3Al2(SiO3)6)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Weathered quartz-rich metamorphic rock (probable quartzite)
Quartzite; predominantly microcrystalline quartz (SiO₂), with possible mica, feldspar, and iron-oxide impurities
metamorphic
Polished red banded stone, likely rhodonite
Rhodonite — manganese inosilicate, MnSiO₃; possibly rhodochrosite or dyed quartz
mineral
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Sandstone (Red Sandstone)
Arenite (SiO2 based with Fe2O3 staining)
sedimentary
Sandstone
Arenite (SiO2 based sedimentary rock)
sedimentary
Likely weathered sandstone or quartzite
Quartz-rich sandstone; possibly metamorphosed to quartzite (SiO₂-dominant)
sedimentary
Quartzite (Beach Pebble)
Quartzite (Composition: SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Weathered granite or granitic gneiss pebble
Granite; mainly quartz (SiO₂), feldspar, and mica, with possible gneissic alteration
igneous
Rounded quartz-rich pebble
Likely milky quartz or quartzite (SiO₂)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Sandstone (Ferruginous)
Arenite (Iron-rich)
sedimentary
Likely basalt
Basalt; fine-grained mafic volcanic rock composed mainly of plagioclase, clinopyroxene, and often olivine
igneous
Desert Rose
Selenite Rose (Gypsum: CaSO4·2H2O)
mineral
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Pink Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite river stone
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (chiefly SiO2)
metamorphic
Vesicular basalt
Basalt, typically composed of plagioclase feldspar, pyroxene, and minor olivine or iron oxides
igneous
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
Mineral
Weathered quartz-rich rock, likely quartzite or quartz vein
Quartzite; predominantly quartz (SiO₂), possibly iron-oxide stained
metamorphic
Weathered greenish rock fragment
Indeterminate; possibly epidote- or chlorite-bearing altered silicate rock
mineral