Pegmatite (likely Granitic Pegmatite)
Pegmatite (a coarse-grained igneous rock, often with granitic composition)
igneous
Category
Mineral (Extraterrestrial)
Browse mineral (extraterrestrial) specimens identified by the Rock Identifier community.
Learn about Mineral (Extraterrestrial) in the encyclopedia
View all →
Banded Gneiss
Gneiss (pronounced "nice")
Metamorphic Rock
Granite
Phaneritic Plutonic Felsic Rock
igneous
Magnetite
Magnetite (Fe3O4)
mineral
Rhodochrosite
Manganese Carbonate (MnCO3)
mineral
Granite
Granite
Igneous
Sapphire (Corundum variety)
Sapphire (Al₂O₃)
Mineral
Green Aventurine
Aventurine (a variety of Quartz, SiO2)
mineral
Quartz / Iron-Stained Quartz
Silicon Dioxide (SiO2) with iron oxide inclusions/staining
mineral
Granite
Granite (Mainly Quartz SiO2, Alkali Feldspar (K,Na)AlSi3O8, and Plagioclase Feldspar)
igneous
Milky Quartz with Iron Oxides
Silicon Dioxide (SiO2) with Fe2O3 inclusions
mineral
Bloodstone
Chalcedony (cryptocrystalline quartz)
Mineral/Semiprecious Stone
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Sandstone (Weathered Pebble)
Arenite (primarily SiO2)
sedimentary
Green Aventurine
Aventurine (a variety of Quartz, SiO2 with fuchsite inclusions)
Mineral
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic volcanic rock)
igneous
Granitoid (Pegmatitic Granite)
Granitoid with dominant Potassium Feldspar and Quartz
igneous
Granite
Granite (Phaneritic igneous rock)
igneous
Milky Quartz
Quartz / Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Gneiss
Foliated Metamorphic Gneiss
metamorphic
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Green Aventurine
Silicon Dioxide with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
metamorphic
Basalt (with possible mineral veining)
Basalt (Aphanitic Mafic Igneous Rock)
Igneous
Basalt with minor mineral crusting
Sideromelane / Extrusive Igneous Rock
igneous
Quartzite with Iron Mineral Banding
Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3) staining
metamorphic
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Amygdaloidal Basalt
Basalt with secondary mineral infillings (SiO2, (Ca,Na)2-3(Mg,Fe,Al)5Si8O22(OH)2)
igneous
Granite
Granite (Phaneritic intrusive igneous rock)
igneous
Granite (Core Sample)
Phaneritic Felsic Igneous Rock (Granite)
igneous
Diorite
Phaneritic intermediate intrusive igneous rock
igneous
Granite
Intrusive Felsic Igneous Rock
igneous
Banded Iron Formation (BIF)
Banded Iron Formation (Fe2O3 + SiO2)
sedimentary
Diorite (Dalmatian Stone variant)
Intermediate Phaneritic Igneous Rock
igneous
Blue Goldstone
Aventurine Glass (Silicon Dioxide with metal inclusions)
man-made glass mineral simulant
Granodiorite
Granodiorite (calc-alkaline phaneritic igneous rock)
igneous
Gneiss (specifically Granitic Gneiss)
Gneiss
metamorphic
Diorite (River Pebble)
Diorite
igneous
Granite
Phaneritic Granocrystalline Igneous Rock
igneous
Gneiss
Gneissic Metamorphic Rock
metamorphic
Diorite (Dalmatian Stone variant)
Phaneritic Intermediate Plutonic Rock (Diorite)
igneous