Scoria (Lava Rock)
Scoria
igneous
Category
Igneous Rock
Browse igneous rock specimens identified by the Rock Identifier community.
Granite
Granite (compositional mixture of Quartz, Feldspar, and Mica)
igneous
Gneiss
Gneiss
metamorphic
Unidentifiable Specimen
Undetermined
Unknown
Greenstone
Metabasalt / Greenschist facies rock
metamorphic
Milky Quartz (Common Quartz)
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Jasper in Basalt Matrix
Silicon Dioxide (SiO2) with impurities; Chalcedony
sedimentary (secondary mineral) within igneous
Serpentine
Serpentine group, including Antigorite, Lizardite, and Chrysotile (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4
metamorphic
Gneiss
Gneiss
metamorphic
Mica (Biotite and Muscovite) in Matrix
Potassium aluminum silicate with iron/magnesium (KAl2(AlSi3O10)(F,OH)2 / K(Mg,Fe)3AlSi3O10(F,OH)2)
igneous
Scoria (Red Lava Rock)
Scoria
igneous
Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Red Scoria (Lava Rock)
Vesicular Basalt / Scoria
igneous
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Pumice
Vesicular volcanic glass (primarily Alumino-silicates)
igneous
Basalt with Porphyritic Texture
Porphyritic Basalt
igneous
Peridotite (Dunite)
Peridotite (mostly Olivine: (Mg,Fe)2SiO4)
igneous
Porphyritic Andesite
Andesite (porphyritic variety)
igneous
Chondrite Meteorite
Ordinary Chondrite (L or H type)
igneous
Granodiorite
Granodiorite (containing Plagioclase, Quartz, and K-feldspar)
igneous
Pumice
Pumice (a vesicular volcanic glass)
igneous
Pumice
Vesicular volcanic glass
igneous
Basalt River Stone
Basalt
igneous
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Quartz River Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Gneiss (specifically Banded Gneiss)
Gneiss
metamorphic
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Prehnite on Basalt
Prehnite - Ca2Al(AlSi3O10)(OH)2
mineral
Sunstone
Oligoclase or Andesine (Labradorite) Feldspar (Na,Ca)(Si,Al)4O8
mineral
Quartz (specifically Citrine or Yellow Quartz)
Silicon Dioxide (SiO2)
mineral
Smoky Quartz (Tumbled)
Silicon Dioxide (SiO2)
mineral
Sunkissed Quartz or Hematoid Quartz
Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions
mineral
White Agate (Chalcedony)
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Granite
Granite
igneous
Folded Schist / Gneiss (Metamorphic Rock)
Regional Metaphoric Folded Outcrop (predominantly Schist/Gneiss)
metamorphic
Olivine in Basalt (Peridotite Xenolith)
Forsterite-rich Olivine (Mg2SiO4) in Aphanitic Basalt
igneous
Pegmatite
Granitic Pegmatite
igneous