Granite
Phaneritic Plutonic Felsic Rock (SiO2 > 69%)
igneous
Category
Mineral In Igneous Rock
Browse mineral in igneous rock specimens identified by the Rock Identifier community.
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) in matrix
mineral/igneous
Muscovite Mica
Muscovite (Potassium Mica) KAl2(AlSi3O10)(OH)2
Mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Gneiss (specifically a Banded Gneiss pebble)
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Granodiorite
Granodiorite (Intermediate intrusive igneous rock)
igneous
Basalt
Basalt (Aphanitic Mafic Igneous Rock)
igneous
Basalt
Basalt (Aphanitic Mafic Igneous Rock)
igneous
Milky Quartz (Water-Worn Pebble)
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Granodiorite
Granodiorite (Intermediate intrusive igneous rock)
igneous
Chalcopyrite
Chalcopyrite (CuFeS2)
mineral
Black Obsidian
Volcanic Glass (SiO2 + impurities)
igneous
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Quartz with inclusions (likely Chlorite or Hornblende) and country rock
SiO2 (Quartz) with associated ferromagnesian minerals
Mineral/Igneous/Metamorphic association
Quartz (Clear/Smoky Geode fragment)
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Pink Granite
Phaneritic plutonic rock (dominated by Alkali Feldspar)
igneous
Pyrite in Matrix (Commonly called Fool's Gold)
Iron Sulfide (FeS2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Basalt
Mafic Igneous Rock (composed of plagioclase feldspar and pyroxene)
igneous
Basalt
Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)
Igneous
Serpentinite
Serpentinite (composed primarily of serpentine group minerals like lizardite, chrysotile, or antigorite; Mg3Si2O5(OH)4)
metamorphic
Yellow Quartz (Citrine/Yellow Jasper mix)
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Greenstone / Greenschist
Greenschist (composed of chlorite, epidote, and actinolite)
metamorphic
Granodiorite
Granodiorite
igneous
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Ruby
Corundum (Aluminium Oxide with Chromium impurities, Al2O3:Cr)
mineral
Granite Cobble
Phaneritic Felsic Igneous Rock (primarily Quartz, Feldspar, and Mica)
igneous
Basalt with Plagioclase Feldspar
Basalt (mafic extrusive igneous rock) with plagioclase feldspar phenocrysts
Igneous
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Granite with Biotite and Quartz
Phaneritic Felsic Igneous Rock (composed of SiO2, KAlSi3O8, and K(Mg,Fe)3AlSi3O10(OH)2)
igneous
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Basalt
Basalt (Aphanitic Mafic Igneous Rock)
igneous
Granite
Phaneritic Plutonic Felsic Rock (SiO2, KAlSi3O8, NaAlSi3O8, CaAl2Si2O8)
igneous
Granite
Phaneritic Felsic Igneous Rock (primarily SiO2, Al2O3, K2O, Na2O)
igneous
Granite (Pink/Red variety)
Phaneritic Felsic Intrusive Igneous Rock (composed primarily of Quartz, K-Feldspar, and Plagioclase)
igneous