Granite
Felsic intrusive igneous rock
Category
Browse mineral on igneous rock specimens identified by the Rock Identifier community.
Granite
Felsic intrusive igneous rock
Granite
Felsic intrusive igneous rock
Granite
Felsic intrusive igneous rock
River Cobble (Weathered Granitoid)
Granodiorite / Quartz Diorite
Smoky Quartz and Chalcedony Geode Fragment
Silicon Dioxide (SiO2)
Weathered granite
Granite, a quartz–feldspar–mica intrusive igneous rock
Weathered granite or granitic gneiss
Granite; primarily quartz, feldspar, and mica
Gneiss (Metamorphic Pebble)
Gneissic Metamorphic Rock
Basalt (with possible Calcite/Quartz veining)
Afanitic Mafic Igneous Rock
Red Granite Pebble
Intrusive Felsic Igneous Rock (Granite)
Granite
Felsic intrusive igneous rock
Biotite (Black Mica)
Biotite - K(Mg,Fe)3AlSi3O10(F,OH)2
Polished gray stone, likely labradorite or gneiss
Indeterminate from image; possibly plagioclase-rich gneiss or labradorite-bearing rock
Vesicular Basalt (Scoria)
Basalt with vesicular texture
Granite
Felsic intrusive igneous rock
Quartz with Host Rock
Silicon Dioxide (SiO2)
Granite Cobble
Granite (Phaneritic igneous rock)
Granite Pebble
Granite (Plutonic Igneous Rock)
Granite
Felsic intrusive igneous rock
Milky Quartz
Silicon Dioxide (SiO2)
Pink Granite
Phaneritic Felsic Igneous Rock
Basalt Pebble
Aphanitic Igneous Rock / Basalt
Diorite (River Rock)
Intermediate plutonic igneous rock
Granite
Granite (Phaneritic igneous rock)
Granite
Phaneritic intrusive igneous rock
Quartz Vein in Host Rock
Silicon Dioxide (SiO2)
Granite
Phaneritic Felsic Igneous Rock
Diorite or Granodiorite Pebble
Intermediate Phaneritic Igneous Rock
K-feldspar Granite / Red Granite Fragment
Alkali feldspar granite (Plutonic igneous rock)
Garnetiferous Pegmatite
Pegmatite with Almandine Garnet and Muscovite
Granodiorite (Weathered)
Granodiorite
Granite with Tourmaline or Biotite
Phaneritic Igneous Rock (Granoid)
Sodalite
Na8(Al6Si6O24)Cl2
Granite
Granite (Felsic intrusive igneous rock)
Dalmatian Jasper
Peralkaline Feldspar Diorite/Rhyolite
Basalt (Vesicular or Porphyritic River Pebble)
Mafic Volcanic Rock (Aphanitic to Porphyritic Basalt)
Granite Cobble
Granite
Granite
Granite (compositionally: Quartz, Alkali Feldspar, and Plagioclase)
Basalt (with possible quartz/calcite inclusion)
Extrusive mafic igneous rock
Mixed rough mineral specimens, likely quartz-bearing rocks
Probable quartz (SiO₂), with possible feldspar, iron oxides, and altered host rock
Weathered Basalt with Iron Staining
Mafic Igneous Rock
Fluorite on Host Rock
Calcium Fluoride (CaF2)