Granite
Granite
igneous
Category
Minerals
Browse minerals specimens identified by the Rock Identifier community.
Learn about Minerals in the encyclopedia
View all →
Granite
Phaneritic Plutonic Felsic Rock
igneous
Gneiss
High-grade regional metamorphic rock (Foliated)
metamorphic
Gneiss
Foliated Metamorphic Rock (Gneiss)
metamorphic
Chrysocolla on Matrix
Hydrated copper silicates ((Cu,Al)2H2Si2O5(OH)4·nH2O)
mineral
Rose Quartz / Iron-stained Quartz
SiO2 (Silicon Dioxide)
mineral
Banded Gneiss (River Rock/Pebble)
Gneiss (specifically a banded variety often found as a river rock)
Metamorphic Rock
Likely rough quartz-bearing mineral specimen
Quartz (silicon dioxide, SiO₂), possibly iron-stained quartz or quartz-rich rock
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Blue Quartzite
Metamorphic Rock (rich in Quartz, SiO2 with inclusions of Dumortierite or Magnesio-riebeckite)
metamorphic
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Raw quartz crystal
Quartz (silicon dioxide, SiO₂)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Schist
Mica Schist
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Graphite-rich metamorphic rock (probable graphite schist)
Graphite schist; predominantly graphite (C) with quartz and mica
metamorphic
Weathered quartz-bearing rock, possibly serpentine or altered ultramafic rock
Provisional identification: serpentinite or chlorite–quartz schist; exact composition requires testing
metamorphic
Quartz fragment (likely milky quartz)
Quartz, silicon dioxide (SiO₂)
mineral
Weathered granite fragment
Granite, chiefly quartz, potassium feldspar, plagioclase, and biotite/hornblende
igneous
Chert (Flint with Iron Staining)
Silicon Dioxide (SiO2)
sedimentary
Gneiss (Banded Gneiss)
Gneiss
metamorphic
Bumblebee Jasper
Carbonate-rich volcanic rock containing Sulfur and Arsenic (Realgar/Orpiment)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Greenstone
Metabasalt / Greenstone
metamorphic
Granodiorite
Granodiorite
igneous
Gneiss (specifically a granitic gneiss cobble)
Gneiss (high-grade regional metamorphic rock)
metamorphic
Dyed Quartz (often sold as 'Blue Quartz' or 'Blue Agate')
Silicon Dioxide (SiO2) with artificial pigment
mineral
Quartz pebble
Silicon dioxide (SiO2)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Granitic Pegmatite
Pegmatite containing Quartz, Feldspar, and Muscovite mica
igneous
Granodiorite (or Granite) Pebble
Phaneritic Felsic Igneous Pebble
igneous
Ironstone Concretion (Limonite/Goethite)
Ironstone (primarily FeO(OH)·nH2O)
sedimentary
Ironstone Concretion (Moqui Marble type)
Ferruginous Concretion (Fe2O3 / FeO(OH))
sedimentary
Chalcopyrite
Copper iron sulfide (CuFeS2)
mineral
Porphyritic volcanic rock (likely andesite or basaltic andesite)
Porphyritic andesite/basaltic andesite; mainly plagioclase, pyroxene, and possibly olivine in a fine volcanic groundmass
igneous
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lithium-bearing Phyllosilicate)
mineral