Light-colored granite or granitic gneiss
Granite; typically quartz + feldspar + mica (variable composition)
igneous
Category
Mineral On Igneous Rock
Browse mineral on igneous rock specimens identified by the Rock Identifier community.
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Basalt (Amygdaloidal)
Amygdaloidal Basalt
igneous
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
Mineral/Gemstone
Granite Cobble / Gneiss (River Rock)
Granitic Gneiss / Felsic Igneous Rock
igneous
Basalt
Basalt (Igneous Volcanic Rock)
igneous
Granite
Phaneritic Felsic Igneous Rock
igneous
Basalt
Extrusive Mafic Igneous Rock
igneous
Unakite
Epidotized Granite
metamorphic
Banded Gneiss
Gneiss (Felsic to Mafic Metamorphic Rock)
metamorphic
Quartz Pebble (with Feldspar/Mica)
Granitic Quartz / SiO2 with KAlSi3O8
igneous
Dalmatian jasper (likely orbicular rhyolite)
Silica-rich rhyolite, commonly sold as Dalmatian jasper; typically quartz, feldspar, and dark amphibole/biotite inclusions
igneous
Granite
Phaneritic Igneous Rock (Granitic)
igneous
Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Basalt
Extrusive Mafic Igneous Rock
igneous
Polished orbicular stone, likely granite or diorite
Granite–diorite, composed mainly of feldspar, quartz, and dark amphibole/biotite
igneous
Pink Granite
Phaneritic Felsic Igneous Rock (Granite)
igneous
Schist
Metamorphic Rock (Schist)
metamorphic
Granite
Phaneritic Felsic Igneous Rock
igneous
Diorite
Intermediate intrusive igneous rock
igneous
Granite / Pegmatite Pebble
Felsic intrusive igneous rock
igneous
Porphyritic Basalt or Porphyritic Andesite
Porphyritic Extrusive Igneous Rock
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Polished dark-and-light speckled stone, likely gabbro or diorite
Likely gabbro or diorite; exact identification is uncertain from the photograph
igneous
Porphyritic Basalt
Basalt (with plagioclase or k-feldspar phenocrysts)
igneous
Granite
Felsic intrusive igneous rock
igneous
Labradorite
Labradorite (Ca, Na)(Al, Si)4O8
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Diorite (River Cobble)
Intermediate phaneritic igneous rock
igneous
Granite
Felsic intrusive igneous rock
igneous
Granite Pebble
Phaneritic Felsic Igneous Rock
igneous
Granite
Granite, a coarse-grained felsic intrusive igneous rock composed chiefly of quartz, feldspar, and mica
igneous
Quartz-rich pebble
Mostly quartz (SiO₂), possibly a quartzite or vein-quartz fragment
mineral
Amygdaloidal Basalt
Basalt with Secondary Mineral Infillings
igneous
Agate
Chalcedony (SiO2)
mineral
Granite
Phaneritic Felsic Igneous Rock (composed of SiO2, KAlSi3O8, NaAlSi3O8)
igneous
Basalt (or similar Mafic Igneous Rock)
Basalt
igneous
Granite Pebble (Pegmatitic Quartz-Feldspar River Rock)
Granite / Quartz-Feldspar-Mica Aggregate
igneous
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) within metamorphic/igneous matrix
igneous/metamorphic
River Pebble (Gneiss/Schist mix)
Metamorphic rock aggregate
metamorphic
Diorite
Diorite (Intermediate intrusive igneous rock)
igneous
Weathered quartz-rich pebble, possibly granite or pegmatite
Quartz (SiO₂) with probable feldspar and minor mica/iron-oxide inclusions
igneous