Granite
Granite (a common rock name, not a single mineral species, composed primarily of quartz, feldspar, and mica/amphibole)
igneous
Category
Mineral In A Matrix (Likely Quartz Or Feldspar)
Browse mineral in a matrix (likely quartz or feldspar) specimens identified by the Rock Identifier community.
Granite
Granite
igneous
Epidote
Epidote (Ca2(Al2,Fe3+)AlSi3O12(OH))
mineral
Basalt with Plagioclase Phenocrysts (Porphyritic Basalt)
Porphyritic Basalt (primarily Plagioclase Feldspar, Pyroxene, and Olivine)
igneous
Granite
Granite (Felsic Plutonic Rock)
Igneous
Petrified Wood
Silicified Wood (SiO2 permineralization)
sedimentary
Granatic Pegmatite
Pegmatitic Granite
igneous
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Jasper in Quartzite (likely Cinnabar or Iron inclusions)
Silicon dioxide (SiO2) with impurities
metamorphic
Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Gneiss (Granitic Gneiss)
Gneiss
metamorphic
Granite (specifically Pink or Alkali Feldspar Granite)
Felsic Plutonic Rock (primarily SiO2 with KAlSi3O8)
igneous
Quartz crystal with Pyrite inclusions
Silicon Dioxide (SiO2) with Iron Sulfide (FeS2)
mineral
Quartz vein in metamorphic rock
Crystalline Silicon Dioxide (SiO2) in Host Rock
metamorphic
Banded River Rock / Gneiss (highly weathered)
Gneiss
Metamorphic rock
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) in Rhyolitic Matrix
igneous
Granodiorite
Granodiorite (Na,Ca)(Si,Al)4O8
igneous
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral
Pink Granite
Phaneritic Felsic Intrusive Igneous Rock
igneous
Quartz Conglomerate
Quartz Conglomerate (clastic sedimentary rock)
sedimentary
Pyrite on Quartz matrix
Iron Disulfide (FeS2) on Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (SiO2 based)
sedimentary
Quartz
Quartz (SiO₂ - Silicon Dioxide)
Mineral
Potassium-Rich Silicate Clay (inferred from biological context)
Phyllosilicate group (likely Illite or Smectite within surrounding soil substrate)
mineral
Milky Quartz with Iron Inclusions
Silicon Dioxide (SiO2)
mineral
Fossiliferous Brachiopod in Shale
Brachiopoda (Phylum) preserved in Carbonaceous Shale
sedimentary
Granite
Granite (a felsic intrusive igneous rock)
Igneous rock
Pegmatite
Pegmatitic Granite
igneous
Basalt with Iron Oxidation (Lattice/Veined)
Mafic Volcanic Rock (principally Plagioclase and Pyroxene)
igneous
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone (Quartzose)
Arenite (Siliciclastic sedimentary rock)
sedimentary
Wishing Stone with Quartz Vein
Hydrothermal Quartz Vein in Metasedimentary Matrix (primarily SiO2)
metamorphic
Granite
Granite (Alkali feldspar, Plagioclase feldspar, and Quartz)
igneous
Feldspar Rich Granite with Limonite Staining
K-Feldspar Granite (KAlSi3O8)
igneous
Porphyritic Andesite
Intermediate Volcanic Rock - Andesite
Igneous
Sandstone
Arenite
sedimentary
Gneiss (specifically Banded Gneiss)
Gneiss
metamorphic
Porphyritic Rhyolite
Porphyritic Rhyolite (compositionally similar to granite)
igneous
Quartz Vein in Host Rock (Gneiss/Schist)
Silicon Dioxide (SiO2) within a metamorphic matrix
metamorphic
Brown Antique Granite
Anorthosite (Technically a plutonic rock composed mainly of plagioclase feldspar)
igneous
Ferruginous Quartz
SiO2 (Silicon Dioxide) with Iron Oxide inclusions (FeO(OH) / Fe2O3)
mineral
Gneiss
Gneiss (Metamorphic rock)
metamorphic