Rock Identifier

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

Calc-Silicate Rock

Calc-Silicate Rock

Carbonatite

Pegmatite

Argillite

Pyroxenite

Dalmatian Jasper

Dalmatian Jasper

Skarn

Serpentinite

Granulite

Cordierite Hornfels

Cordierite Hornfels

Lamprophyre

Bauxite

Granite Sand (Decomposed Granite) (Grus / Quartz-Feldspar Detritus) — sedimentary

Granite Sand (Decomposed Granite)

Grus / Quartz-Feldspar Detritus

Felsic Igneous Rock (likely Rhyolite or weathered Granite) (Felsic Volcanic/Plutonic Rock) — igneous

Felsic Igneous Rock (likely Rhyolite or weathered Granite)

Felsic Volcanic/Plutonic Rock

Milky Quartz (Quartz (Silicon Dioxide - SiO2)) — mineral

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Basalt (Extrusive Igneous Rock) — igneous

Basalt

Extrusive Igneous Rock

Asphalt Chunk (Asphalt concrete) — man-made composite

Asphalt Chunk

Asphalt concrete

man-made composite

Greenstone / altered basalt fragment (Likely chlorite–epidote–actinolite altered basalt; exact identification requires testing) — igneous

Greenstone / altered basalt fragment

Likely chlorite–epidote–actinolite altered basalt; exact identification requires testing

Basalt (Basalt (Mafic Extrusive)) — igneous

Basalt

Basalt (Mafic Extrusive)

Yellow Agate (Chalcedony (cryptocrystalline Quartz), SiO2) — mineral

Yellow Agate

Chalcedony (cryptocrystalline Quartz), SiO2

Sandstone (Arenite (SiO2 based typically)) — sedimentary

Sandstone

Arenite (SiO2 based typically)

Labradorite (tumbled) (Labradorite (a plagioclase feldspar mineral between anorthite and albite; chemical formula: (Ca,Na)(Si,Al)4O8)) — Mineral

Labradorite (tumbled)

Labradorite (a plagioclase feldspar mineral between anorthite and albite; chemical formula: (Ca,Na)(Si,Al)4O8)

Feldspar (Plagioclase / Orthoclase) (KAlSi3O8 / CaAl2Si2O8 - NaAlSi3O8) — mineral

Feldspar (Plagioclase / Orthoclase)

KAlSi3O8 / CaAl2Si2O8 - NaAlSi3O8

Amygdaloidal Basalt (Amygdaloidal Basalt (Mafic volcanic rock with secondary mineral fillings)) — igneous

Amygdaloidal Basalt

Amygdaloidal Basalt (Mafic volcanic rock with secondary mineral fillings)

Clear Quartz (Rock Crystal) (Silicon Dioxide (SiO2)) — mineral

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Basalt (Vesicular) (Vesicular Basalt) — Igneous

Basalt (Vesicular)

Vesicular Basalt

Amygdaloidal Basalt (Amygdaloidal Basalt (Mafic Extrusive volcanic rock)) — igneous

Amygdaloidal Basalt

Amygdaloidal Basalt (Mafic Extrusive volcanic rock)

Obsidian (Volcanic Glass (Amorphous Silica)) — igneous

Obsidian

Volcanic Glass (Amorphous Silica)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Granite (Phaneritic plutonic rock (composed of Quartz, Feldspar, and Mica/Amphibole)) — igneous

Granite

Phaneritic plutonic rock (composed of Quartz, Feldspar, and Mica/Amphibole)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Granite (Granite (Phaneritic Quartz-Feldspar Rock)) — igneous

Granite

Granite (Phaneritic Quartz-Feldspar Rock)

Diorite (Diorite (intermediate intrusive igneous rock)) — igneous

Diorite

Diorite (intermediate intrusive igneous rock)

Geode (Unopened) (Siliceous Geode (SiO2)) — sedimentary

Geode (Unopened)

Siliceous Geode (SiO2)

Pumice (Pumiceous volcanic glass) — igneous

Pumice

Pumiceous volcanic glass

Granite or Pegmatite in host rock (Granitoid / Felsic Intrusive Rock) — Igneous

Granite or Pegmatite in host rock

Granitoid / Felsic Intrusive Rock

Granodiorite (Granodiorite (phaneritic intrusive igneous rock)) — igneous

Granodiorite

Granodiorite (phaneritic intrusive igneous rock)

Quartz (Tumbled) (Silicon Dioxide (SiO2)) — mineral

Quartz (Tumbled)

Silicon Dioxide (SiO2)

Quartz in Matrix (possibly Basalt or Siltstone host) (Silicon Dioxide (SiO2) in Host Rock) — mineral

Quartz in Matrix (possibly Basalt or Siltstone host)

Silicon Dioxide (SiO2) in Host Rock

Chromite (Chromite (FeCr2O4)) — mineral

Chromite

Chromite (FeCr2O4)

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

Basalt (Basalt (aphanitic mafic volcanic rock)) — igneous

Basalt

Basalt (aphanitic mafic volcanic rock)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Magnetite (Iron Ore) (Magnetite (Fe3O4)) — mineral

Magnetite (Iron Ore)

Magnetite (Fe3O4)

Basalt (Basalt (dominated by Plagioclase and Pyroxene)) — igneous

Basalt

Basalt (dominated by Plagioclase and Pyroxene)

Gneiss (Gneiss (High-grade Regional Metamorphic Rock)) — metamorphic

Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Green Chalcedony (likely Chrysoprase or Green Onyx) (Silicon Dioxide (SiO2) with trace nickel or chromium inclusions) — mineral

Green Chalcedony (likely Chrysoprase or Green Onyx)

Silicon Dioxide (SiO2) with trace nickel or chromium inclusions

Fuchsite (Chromium-rich Muscovite (KAl2(AlSi3O10)(OH,F)2 with Cr replacements)) — mineral

Fuchsite

Chromium-rich Muscovite (KAl2(AlSi3O10)(OH,F)2 with Cr replacements)

Blue Dumortierite Quartz (AlAl6BSi3O18 (Dumortierite) within SiO2 (Quartz)) — mineral

Blue Dumortierite Quartz

AlAl6BSi3O18 (Dumortierite) within SiO2 (Quartz)

Andesite (Andesite (Intermediate Extrusive Volcanic Rock)) — igneous

Andesite

Andesite (Intermediate Extrusive Volcanic Rock)

Gneiss (Metamorphic Gneiss) — metamorphic

Gneiss

Metamorphic Gneiss

Serpentinite (Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4) — metamorphic

Serpentinite

Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4

Serpentine (Antigorite/Chrysotile/Lizardite mix - Mg3Si2O5(OH)4) — metamorphic

Serpentine

Antigorite/Chrysotile/Lizardite mix - Mg3Si2O5(OH)4

Feldspar (specifically Orthoclase) (Potassium aluminum silicate (KAlSi3O8)) — mineral

Feldspar (specifically Orthoclase)

Potassium aluminum silicate (KAlSi3O8)