Granite Pebble
Granite (composed primarily of Quartz SiO2, Feldspar KAlSi3O8, and Mica)
igneous
Category
Igneous Rock
Browse igneous rock specimens identified by the Rock Identifier community.
Learn about Igneous Rock in the encyclopedia
View all →
Basalt with Quartz Vein
Mafic Volcanic Rock with SiO2 intrusion
igneous
Granitic Pegmatite with Muscovite Mica
Pegmatite (containing KAl2(AlSi3O10)(OH)2)
igneous
Obsidian (Apache Tear)
Amorphous Volcanic Glass (SiO2)
igneous
Vesicular Basalt
Basalt (Mafic Extrusive Volcanic Rock)
igneous
Pink Granite
Phaneritic Plutonic Felsic Rock (K-Feldspar Granite)
igneous
River Stone (Grey Andesite)
Intermediate extrusive volcanic rock (Andesite)
igneous
Basalt with Mineral Vein (Cobble)
Basalt (with likely Quartz/Calcite vein)
Igneous
Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Gneiss
High-grade Metamorphic Gneiss
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Yellow Quartz (Citrine/Yellow Jasper mix)
Silicon Dioxide (SiO2)
mineral
Vesicular Basalt
Amygdaloidal Basalt (Mafic extrusive volcanic rock)
Igneous
Pink Granite / Gneiss
Felsic Plutonic Rock (Granite) with Gneissic banding
igneous / metamorphic
Greenschist
Greenschist (Chlorite-actinolite schist)
metamorphic
Quartz (Druzy/Macro-crystalline)
Silicon Dioxide (SiO2)
mineral
Granite
Granite (Felsic Plutonic Rock)
igneous
Basalt
Basalt (Mafic volcanic rock)
Igneous
Peridotite
Ultramafic intrusive rock (Peridotite)
Igneous
Basalt
Basalt (extrusive volcanic rock)
igneous
Basalt with Iron Oxide staining
Basalt (Mafic volcanic rock)
igneous
Granite
Granite (Felsic Plutonic Rock)
igneous
Basalt
Basalt (Mafic volcanic rock)
igneous
Yooperlite (Fluorescent Sodalite-bearing Syenite)
Sodalite-bearing Syenite
igneous
Decomposed Granite
Grano-diorite/Granite-residuum (SiO2 primary)
igneous
Porphyritic Basalt
Porphyritic Basalt (containing Plagioclase phenocrysts)
igneous
Granite
Granite (compositional mixture of Quartz, Feldspar, and Mica)
igneous
Scoria (Lava Rock)
Scoria
igneous
Olivine in Basalt (Peridot)
Magnesium Iron Silicate (Mg,Fe)2SiO4 (Mineral) / Scoriaceous Basalt (Host Rock)
igneous
Red Scoria (Lava Rock)
Vesicular Basalt / Scoria
igneous
Diorite (Salt and Pepper Rock)
Diorite
igneous
Flowerstone (Porphyry)
Porphyritic Andesite or Basalt
igneous
Quartz Crystal Cluster
Silicon Dioxide (SiO2)
mineral
Quartz (Milky or Smoky variety)
Silicon Dioxide (SiO2)
mineral
Greenstone with Magnetite Veins
Metabasalt (Greenstone)
metamorphic
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Pumice
Pumice (a highly vesicular volcanic glass)
igneous
Green Apophyllite and Stilbite on Quartz Cluster
Apophyllite-(K) (KCa4(Si8O20)(F,OH)·8H2O), Stilbite-Ca (NaCa4(Si27Al9)O72·28H2O), Quartz (SiO2)
Mineral
Granite (with Almandine Garnet inclusions)
Granite composed primarily of Quartz (SiO2), K-Feldspar (KAlSi3O8), and Almandine Garnet (Fe3Al2(SiO4)3)
igneous
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Scoria (Lava Rock)
Scoria (Vesicular Basaltic Glass/Rock)
igneous
Porphyritic Basalt (Chinese Writing Stone)
Porphyritic Basalt or Andesite containing plagioclase feldspar phenocrysts
igneous