Peridot (Olivine)
Olivine ((Mg,Fe)2SiO4)
Mineral
Category
Mineral Like Byproduct (Often Mistaken For Igneous Rock Or Meteorite)
Browse mineral like byproduct (often mistaken for igneous rock or meteorite) specimens identified by the Rock Identifier community.
Learn about Mineral Like Byproduct (Often Mistaken For Igneous Rock Or Meteorite) in the encyclopedia
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Snowflake Obsidian
Vitreous volcanic rock with Cristobalite inclusions (mostly SiO2)
igneous
Ferruginous Quartz (Iron-stained Quartz)
Silicon Dioxide (SiO2) with Hematite/Limonite impurities
mineral
Sedimentary Sandstone with Iron Oxide
Ferruginous Sandstone
sedimentary
Magnetite / Iron-Rich Basalt
Magnetite bearing Mafic Rock (Fe3O4)
igneous
Serpentinite with Quartz/Calcite Veining
Serpentinite (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4
metamorphic
Quartz
Silicon Dioxide (SiO2)
mineral
Basalt
Basalt
igneous
Opalite
Man-made glass (traditionally simulated Opal)
mineral
Quartz (Gray or Smoky variety)
Silicon Dioxide (SiO2)
mineral
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Granite
Granite (a plutonic igneous rock)
Igneous
Basalt (Vesicular or Porphyritic)
Aphanitic Mafic Igneous Rock
igneous
Sandstone
Arenite (SiO2 primarily)
sedimentary
Gneiss
Gneissic Metamorphic Rock
metamorphic
Basalt with Quartz Vein
Mafic Volcanic Rock with SiO2 intrusion
igneous
Vesicular Basalt
Vesicular Basalt (rich in silicate minerals mostly Plagioclase and Pyroxene)
igneous
Scoria (Lava Rock)
Vesicular Basalt / Scoria
igneous
White Howlite
Howlite (Hydrated calcium borosilicate, Ca2B5SiO9(OH)5)
mineral
Carnelian Agate
Silicon Dioxide (SiO2) - Variety: Chalcedony
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz
Quartz (SiO2 - Silicon Dioxide)
Mineral
Gneiss
Gneiss
metamorphic
Granite
Granite
igneous
Basalt
Mafic Igneous Rock (composed primarily of pyroxene and calcium-rich plagioclase)
igneous
Garnet (Almandine)
Almandine (Fe3Al2(SiO4)3)
mineral
Porphyritic Igneous Pebble / Porphyry
Porphyritic Igneous Rock
igneous
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Granite
Granite
Igneous
Pumice
Pumice (Highly vesicular felsic extrusive igneous rock; primarily SiO2)
igneous
Granodiorite
Granodiorite (Intermediate intrusive igneous rock)
igneous
Banded Chert
Microcrystalline Quartz (SiO2)
sedimentary
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Scoria
Vesicular Basaltic Rock
igneous
Basalt
Basalt
igneous
Schist
Mica Schist (primarily Muscovite or Biotite sheet silicates)
metamorphic
Epidote-bearing Rock / Epidote Inclusion
Epidote (Ca2(Al, Fe)3(SiO4)3(OH)) in host rock
mineral
Granite Gneiss
Felsic Gneiss
metamorphic
Quartz Geode
Silicon Dioxide (SiO2) within a geode
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Diorite (Salt and Pepper Rock)
Diorite
igneous