Granite with Tourmaline or Biotite
Phaneritic Igneous Rock (Granoid)
Category
Browse mineral on igneous rock specimens identified by the Rock Identifier community.
Granite with Tourmaline or Biotite
Phaneritic Igneous Rock (Granoid)
Granite
Felsic intrusive igneous rock
Basalt or Slag
Extrusive Igneous Rock / Industrial Slag
Vesicular Basalt (Scoria)
Basalt (Extrusive Igneous Rock)
Gneiss (with Quartzite and Biotite)
Gneiss containing SiO2 (Quartz), K(Mg,Fe)3AlSi3O10(OH)2 (Biotite), and (K,Na,Ca)AlSi3O8 (Feldspar)
Lapis Lazuli
Na8[Al6Si6O24]Sn (Lazurite-rich metamorphic rock)
Granite
Granite (Plutonic Igneous Rock)
Granite River Cobble
Granite
Banded Gneiss
Gneiss (Metamorphic Rock)
Diorite
Intermediate plutonic igneous rock
Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Granite
Granite (Felsic Plutonic Rock)
Granite
Plutonic felsic igneous rock
Granite
Granite (phaneitic intrusive igneous rock)
Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
Milky Quartz
Silicon Dioxide (SiO2)
Granodiorite
Granodiorite (containing Quartz, Plagioclase Feldspar, Biotite, and Hornblende)
White Quartz Pebble
Silicon Dioxide (SiO2)
Gneiss
Gneiss (High-grade metamorphic rock)
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
Quartz
Silicon Dioxide (SiO2)
Quartz Crystal
Silicon Dioxide (SiO2)
Amethyst
Silicon dioxide (SiO2)
Likely weathered gneiss or mica-rich schist
Foliated metamorphic rock, probably quartz–feldspar–biotite gneiss/schist
Quartz / Rose Quartz
Silicon Dioxide (SiO2)
Quartz (Iron-Stained)
Silicon Dioxide (SiO2)
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic Extrusive volcanic rock)
Diorite
Diorite (Intermediate intrusive igneous rock)
Lapis Lazuli
Lapis lazuli (Complex silicate rock containing Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Calcite, and Pyrite)
Diorite (Spotted)
Diorite (Intrusive igneous rock)
Dalmatian Stone
Dalmatian Jasper (Aphanitic Igneous Rock with Arfvedsonite inclusions)
Clear Quartz Point
Silicon Dioxide (SiO2)
Obsidian
Volcanic Glass (SiO2)
Diorite
Diorite
Granite
Phaneritic Felsic Igneous Rock
Quartz
Silicon Dioxide (SiO2)
Quartz Vein in Host Rock
Silicon Dioxide (SiO2)
Granite or Pegmatite in host rock
Granitoid / Felsic Intrusive Rock
Quartz
Silicon Dioxide (SiO2)
Granite / Diorite
Intrusive Igneous Rock (Granitoid / Diorite)
Basalt Porphyry
Porphyritic Basalt