Likely weathered igneous rock fragments
Indeterminate; possibly basaltic or granitic rock with quartz, feldspar, and dark mafic minerals
Category
Browse mineral on igneous rock specimens identified by the Rock Identifier community.
Likely weathered igneous rock fragments
Indeterminate; possibly basaltic or granitic rock with quartz, feldspar, and dark mafic minerals
Gneiss
High-grade regional metamorphic rock (Foliated)
Dalmation Stone (frequently called Dalmatian Jasper)
Peralkaline Quartz-Feldspar Rock
Granite
Phaneritic Felsic Igneous Rock
Schist
Schist (Foliated Metamorphic Rock)
Clear Quartz
Silicon dioxide (SiO2)
Quartz Crystal Point
Silicon Dioxide (SiO2)
Quartz (Milky Quartz vein fragment)
Silicon Dioxide (SiO2)
Amygdaloidal Basalt
Extrusive Igneous Rock with Amygdules
Epidote-bearing Rock
Epidote / Silicate mineral aggregate
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic Volcanic Rock)
Red Granite
Intrusive Igneous Rock (Felsic)
Granite
Felsic intrusive igneous rock
Dalmation Stone
Peralkaline Rock (SiO2 with Arfvedsonite)
Granite
Felsic intrusive igneous rock
Granite
Granite (Phaneritic Quartz-Feldspar Plutonic Rock)
Quartz
Silicon Dioxide (SiO2)
Serpentinite
Serpentinite (Hydrated magnesium iron phyllosilicate)
Dalmatian Stone
Dalmatian Jasper (a misnomer for an Aplite with Arfvedsonite spots)
Granite Pebble
Intrusive Igneous Rock (Quartz, Feldspar, Mica)
Gneiss
Metamorphic Gneiss
Granite
Phaneritic Plutonic Felsic Rock
Feldspar-rich igneous rock, likely granite or gneiss fragment
Granite-like quartz–feldspar rock; exact identification is uncertain from the blurred image
Granite
Intrusive Igneous Rock (Felsic)
Granite Pebble
Granite (Plutonic Igneous Rock)
Granite
Phaneritic Felsic Igneous Rock
Dragonstone (Brecciated Basalt/Diabase with Epidote and Quartz)
Brecciated mafic igneous rock
Granite Cobble
Phaneritic Felsic Igneous Rock
Granite
Phaneritic Felsic Igneous Rock
Granite (Fine-grained)
Phaneritic Felsic Igneous Rock
Sodalite
Sodalite (Na8Al6Si6O24Cl2)
Vesicular Basalt with Epidote
Vesicular Basalt (Mg, Fe)2SiO4 with Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))
Quartz pebble (Agate / Chalcedony)
Silicon Dioxide (SiO2)
Moss Agate with Jasper
Chalcedony (SiO2 with inclusions)
Basalt
Aphanitic Mafic Igneous Rock
Quartz Geode Fragment
Silicon Dioxide (SiO2)
Dalmatian Stone
Dalmatian Stone (formerly called Dalmatian Jasper)
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
White Quartz
Silicon Dioxide (SiO2)
Eclipse Stone (Kabamba Jasper)
Rhyolite with Aegirine (NaFe3+Si2O6)
Decorative polished pebbles
Likely mixed quartz-rich lithologies, including quartzite, jasper, and/or basalt
Granite
Felsic intrusive igneous rock