Gneiss
Gneiss (Metamorphic Rock)
Category
Browse mineral in igneous rock specimens identified by the Rock Identifier community.
Gneiss
Gneiss (Metamorphic Rock)
Granite
Granite (Phaneritic igneous rock)
Porphyritic Granite (or Porphyry)
Porphyritic Igneous Rock
Granite / Diorite (Granitoid)
Granitoid rock (composed mainly of Quartz, Feldspar, and Amphibole/Biotite)
Basalt with Hematite staining
Extrusive mafic igneous rock with Fe2O3
Conical fossil shell or shell fragment
Likely a gastropod shell fragment; exact taxon indeterminate from the image
Smoky Quartz on Feldspar (Granite Pegmatite)
Silicon Dioxide (SiO2) with Potassium Aluminum Silicate (KAlSi3O8)
Milky Quartz
Silicon Dioxide (SiO2)
Blue Chalcedony
Silicon Dioxide (SiO2)
Granite
Felsic intrusive igneous rock
Granite
Phaneritic Felsic Igneous Rock
Granite
Phaneritic Felsic Igneous Rock (Granite)
River Pebble (Gneiss/Schist mix)
Metamorphic rock aggregate
Amygdaloidal Basalt
Vesicular-Amygdaloidal Basalt (Mafic Extrusive)
Granite
Granite (a felsic intrusive igneous rock)
Rose Quartz
Silicon Dioxide with trace inclusions of dumortierite or titanium (SiO2)
Gneiss
Gneiss (High-grade metamorphic rock)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Amygdaloidal Basalt
Amygdaloidal Basalt
Granite
Granite (Phaneritic Igneous Rock)
Granite
Phaneritic Felsic Igneous Rock
Granite
Felsic intrusive igneous rock
Granite
Phaneritic Felsic Igneous Rock
Pink Granite
Phaneritic Felsic Igneous Rock
Quartz with Sulfide Inclusions
Silicon Dioxide (SiO2) with metallic mineral inclusions
Basalt
Extrusive mafic igneous rock
Gneiss
Gneiss (High-grade metamorphic rock)
Gneiss
Foliated Metamorphic Rock
Quartz
Silicon Dioxide (SiO2)
Granite (Phaneritic Igneous Rock)
Granite
Gneiss
Foliated Metamorphic Rock (Gneiss)
Pink Granite
Phaneritic Felsic Igneous Rock
Granite (Polished Countertop Surface)
Plutonic Igneous Rock (Felsic)
Gneiss
Gneiss
Diorite
Diorite (intermediate plutonic rock)
Granite
Phaneritic Felsic Igneous Rock (Granite)
Greenstone (Epidosite)
Epidosite (Metamorphosed Basalt/Diabase)
Mixed Rock and Mineral Collection
Mixed Assemblage (includes Quartz, Jasper, Feldspar, and Turquoise-colored stones)
Granite
Phaneritic Felsic Igneous Rock
Quartz
Silicon Dioxide (SiO2)
Dalmation Stone (often called Dalmatian Jasper)
Antiperthite-rich Microgranite
Granite Pebble
Granite (Plutonic Igneous Rock)