Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Category
Minerals
Browse minerals specimens identified by the Rock Identifier community.
Learn about Minerals in the encyclopedia
View all →
Diorite
Diorite
igneous
Quartz with Sericite and Cinnabar
Silicon Dioxide (SiO2) with muscovite/sericite and mercury sulfide (HgS)
mineral
Weathered iron-rich rock, possibly oxidized basalt or laterite
Indeterminate; likely iron-oxide-bearing mafic rock (basaltic composition)
igneous
Mica Schist
Mica Schist (primarily Muscovite or Biotite sheet silicates)
metamorphic
Greenschist (Chlorite Schist)
Greenschist (containing Chlorite, Actinolite, and Epidote)
metamorphic
Granite Gneiss
Gneiss (high-grade metamorphic rock)
metamorphic
Weathered granitic rock fragment
Granitoid, likely granodiorite or granite
igneous
Schist
Mica schist, likely muscovite–biotite schist with quartz and feldspar
metamorphic
Limonite Concretion
Limonite (Hydrated Iron Oxide) FeO(OH)·nH2O
sedimentary
Polished serpentine (likely green serpentinite)
Serpentinite; chiefly serpentine-group minerals, Mg₃Si₂O₅(OH)₄, with magnetite and possible chromite or carbonate inclusions
metamorphic
Mica Schist
Schist (primarily Muscovite and Biotite mica)
metamorphic
Marble
Recrystallized Calcite (CaCO3)
metamorphic
Milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Diorite (River Rock/Cobble)
Intermediate Plutonic Igneous Rock (Diorite)
igneous
Gneiss
Gneiss (High-grade regional metamorphic rock)
Metamorphic
Banded Gneiss
Gneiss
metamorphic
Diorite
Diorite (Intermediate intrusive igneous rock)
igneous
Diorite
Phaneritic intermediate plutonic rock
igneous
Polished granite pebble
Granite; chiefly quartz, feldspar, and mica/amphibole
igneous
Polished granite countertop with fossil shell
Granite; shell likely a fossilized bivalve or gastropod
igneous
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Massive Quartz
Silicon dioxide (SiO2)
mineral
Pink Granite Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Chrysocolla in Cuprite
(Cu,Al)2H2Si2O5(OH)4 · nH2O (Chrysocolla) and Cu2O (Cuprite)
mineral
Gossan (Limonite/Ironstone)
Hydrated Iron Oxide (FeO(OH)·nH2O)
sedimentary
Orbicular granite (likely Rapakivi-type granite)
Granite, chiefly quartz, alkali feldspar, plagioclase, and biotite/hornblende
igneous
Gneissic Granite
Granite Gneiss
metamorphic
Weathered schist
Mica schist, likely chlorite–biotite schist
metamorphic
Gold Ore
Native Gold (Au) in Quartz or Silicate matrix
mineral
Schist
Mica Schist (Metamorphic rock)
metamorphic
Limonite Concretion (Goonie or Rattlestone)
Limonite (FeO(OH)·nH2O)
sedimentary
Gneiss
Gneiss
metamorphic
Gabbro
Gabbro (Mafic Plutonic Rock)
igneous
Gneiss (Metamorphic Rock)
Gneiss
metamorphic
Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Gneiss (specifically a Granitic Gneiss)
Gneiss (Composition: Quartz, Feldspar, Mica)
metamorphic
Gneiss (foliated metamorphic rock)
Gneiss
metamorphic
Limonite pseudo-concretion (Ironstone)
Limonite (FeO(OH)·nH2O) / Goethite
sedimentary
Milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Azurite-Malachite with Limonite
Cu3(CO3)2(OH)2 (Azurite) / Cu2CO3(OH)2 (Malachite)
mineral
Azurite and Malachite on Matrix
Azurite: Cu3(CO3)2(OH)2; Malachite: Cu2CO3(OH)2
mineral