Amphibolite (specifically Hornblende Schist/Gneiss)
Amphibole-rich Metamorphic Rock
Category
Browse metamorphic rock (composed of multiple minerals) specimens identified by the Rock Identifier community.
Amphibolite (specifically Hornblende Schist/Gneiss)
Amphibole-rich Metamorphic Rock
Blue Quartzite
Quartzite (primarily SiO2 with inclusions like Dumortierite or Magnesio-riebeckite)
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)3(Si, Al, Fe)2O5(OH)4
Blue Kyanite
Kyanite (Al2SiO5)
Clear Quartz Crystal
Quartz (Silicon Dioxide - SiO2)
Banded Marble
Recrystallized Calcite (CaCO3)
Granite (with Almandine Garnet inclusions)
Granite composed primarily of Quartz (SiO2), K-Feldspar (KAlSi3O8), and Almandine Garnet (Fe3Al2(SiO4)3)
Sandstone
Arenite (composed primarily of SiO2)
Gneiss
Gneiss
Milky Quartz
Silicon Dioxide (SiO2)
Gneiss
Gneiss (High-grade Metamorphic Rock)
Granite
Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)
Greenschist
Greenschist facies rock (containing chlorite, actinolite, albite, and epidote)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Gneiss
Gneiss (a rock type, not a specific mineral with a formula)
Conglomerate
Conglomerate
Serpentinite
Serpentinite (composed primarily of mineral group (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4)
Sandstone (with Lichen)
Arenite (primarily SiO2)
Blue Apatite
Apatite - Ca5(PO4)3(F,Cl,OH)
Tiger Diamond / Hematite-infused Quartzite
Silicified Hematite-Rich Quartzite (SiO2 + Fe2O3)
Sandstone (Quartzose Sandstone)
Clastic Sedimentary Rock (composed mostly of SiO2)
Gneiss (specifically Banded Gneiss)
Gneiss
Gneiss
Gneiss
Basalt
Basalt (Mafic Extrusive)
Granite / Gneiss Complex
Felsic Plutonic Rock (Granite) or High-grade Metamorphic Rock (Gneiss)
Shiva Lingam
Cryptocrystalline Quartz (Jasproid/Jasper)
Gneiss (specifically Micaceous Gneiss)
Gneiss (High-grade Regional Metamorphic Rock)
Greenstone
Greenschist / Meta-basalt
Gneiss
Foliated Metamorphic Gneiss
Greenstone
Metabasalt / Metamorphosed Igneous Rock
Sandstone
Arenite
Schist
Schist (various mineralogical compositions including mica, chlorite, talc, etc.)
Gneiss (Cobble)
Gneiss
Quartz (likely)
Quartz (SiO2 - Silicon Dioxide)
Greenschist
Greenschist facies rock
Raw Diamond
Carbon (C)
Diamond (Cut Specimen)
Diamond (pure carbon, C)
Sandstone (likely Arkose or Quartz Sandstone)
Arenite (SiO2 + varied clasts)
Limonite Concretion
Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)
Gneiss
High-grade Metamorphic Gneiss
Banded River Rock / Gneiss (highly weathered)
Gneiss
Gneiss
Gneiss