Moonstone
Orthoclase Feldspar (KAlSi3O8)
Category
Browse mineral on igneous rock specimens identified by the Rock Identifier community.
Moonstone
Orthoclase Feldspar (KAlSi3O8)
Basalt with Quartz Vein
Mafic Igneous Rock (SiO2 filling)
Granite (River Pebble)
Phaneritic intrusive igneous rock (Felsic)
Granite
Intrusive Felsic Igneous Rock
Milky Quartz with Country Rock contact
Silicon Dioxide (SiO2) in contact with Metamorphic/Igneous rock
Dalmatian Stone
Peralkaline Feldsphathic Igneous Rock
Sodalite
Sodalite, Na8(Al6Si6O24)Cl2
Fluorite with Quartz coating
Calcium Fluoride (CaF2) with Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Diorite
Diorite (Intermediate intrusive igneous rock)
Druzy Quartz
Silicon Dioxide (SiO2)
Pebble
Clast (specifically a granule or small pebble)
Magnetite Orthorthotropic Rock
Magnetite (Fe3O4)
Basalt
Mafic Igneous Rock
Biotite (Black Mica)
Biotite (K(Mg,Fe++)3AlSi3O10(OH,F)2)
Serpentine
Antigorite, Lizardite, or Chrysotile (Mg, Fe)3Si2O5(OH)4
Basalt with Quartz/Calcite Veins
Amygdaloidal Basalt (SiO2 or CaCO3 inclusions)
Dalmatian Jasper
Dalmatian Stone (a microcrystalline quartz and feldspar rock with arfvedsonite)
Quartz Vein in Host Rock
Quartz (SiO2) in Mafic or Sedimentary Matrix
Gneiss (Pebble)
Gneiss
Granite
Phaneritic Felsic Igneous Rock
Grey River Stone (Gneiss/Schist mix)
Foliated Metamorphic Rock (variable mineral formula)
Pink Feldspar
Orthoclase Feldspar (KAlSi3O8)
Granite
Granite (Felsic Plutonic Rock)
Quartz in Basalt (Xenocryst)
Silicon Dioxide (SiO2) in Mafic Igneous Volcanic Rock
Amygdaloidal Basalt with Zeolite/Quartz Infill
Amygdaloidal Basalt (Host: (Mg,Fe)2SiO4 / CaAl2Si2O8; Infill: SiO2 or Na2Al2Si3O10·2H2O)
White Quartz
Silicon Dioxide (SiO2)
Gabbro
Gabbro (Mafic Plutonic Rock)
Anyolite (Ruby in Zoisite)
Zoisite with inclusions of Hornblende and Ruby (Ca2Al3(SiO4)3(OH))
Granite
Phaneritic Felsic Igneous Rock (composed of SiO2, KAlSi3O8, NaAlSi3O8)
Biotite Mica
Biotite (K(Mg,Fe)3AlSi3O10(OH,F)2)
Basalt (Amygdaloidal)
Amygdaloidal Basalt
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
Granite
Granite
Amygdaloidal Basalt
Basalt with Secondary Mineral Infillings
Granitic Pegmatite
Pegmatitic Granite
Pink Granite
Phaneritic Felsic Intrusive Igneous Rock
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals, Mg3Si2O5(OH)4)
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic silicate with secondary mineral inclusions)
Granite Pebble (River Rock)
Granite (composed primarily of Quartz, Feldspar, and Mica)
Dalmatian Stone
Peralkaline rhyolite with arfvedsonite (formerly incorrectly called Dalmatian Jasper)