Rock Identifier

Category

Metamorphic Or Igneous (Context Dependent)

Browse metamorphic or igneous (context dependent) specimens identified by the Rock Identifier community.

Learn about Metamorphic Or Igneous (Context Dependent) in the encyclopedia

Carbonatite

Cordierite Hornfels

Cordierite Hornfels

Metabasalt

Eulysite

Migmatite

Anthracite

Hornfels

Metaquartzite

Slate

Marble

Metarhyolite

Metagabbro

Tumbled citrine or iron-stained quartz (Quartz (SiO₂), likely iron-oxide-stained or natural citrine) — mineral

Tumbled citrine or iron-stained quartz

Quartz (SiO₂), likely iron-oxide-stained or natural citrine

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Hematite (Iron(III) oxide (Fe2O3)) — mineral

Hematite

Iron(III) oxide (Fe2O3)

Green Aventurine (Silicon Dioxide (SiO2) with Chromium-rich Fuchsite mica) — mineral

Green Aventurine

Silicon Dioxide (SiO2) with Chromium-rich Fuchsite mica

Dearest Ring (Gemstones) (Mixed Gemstones: Diamond (C), Emerald (Be3Al2Si6O18), Amethyst (SiO2), Ruby (Al2O3), Sapphire (Al2O3), Topaz (Al2SiO4(F,OH)2)) — mineral

Dearest Ring (Gemstones)

Mixed Gemstones: Diamond (C), Emerald (Be3Al2Si6O18), Amethyst (SiO2), Ruby (Al2O3), Sapphire (Al2O3), Topaz (Al2SiO4(F,OH)2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Green fluorite (likely) (Fluorite, calcium fluoride (CaF₂)) — mineral

Green fluorite (likely)

Fluorite, calcium fluoride (CaF₂)

Chert / Flint Handaxe (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert / Flint Handaxe

Cryptocrystalline Quartz (SiO2)

Chert (Flint) Artifact (Silicon Dioxide (SiO2)) — sedimentary

Chert (Flint) Artifact

Silicon Dioxide (SiO2)

Granite Pebble (Granite (Phaneritic intrusive igneous rock)) — igneous

Granite Pebble

Granite (Phaneritic intrusive igneous rock)

Corundum (Sapphire in Matrix) (Aluminum Oxide (Al2O3)) — mineral

Corundum (Sapphire in Matrix)

Aluminum Oxide (Al2O3)

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Orange Aventurine (or Tumbled Carnelian) (Quartz (SiO2) with inclusions) — mineral

Orange Aventurine (or Tumbled Carnelian)

Quartz (SiO2) with inclusions

Emerald in Matrix (Beryl (Be3Al2Si6O18)) — mineral

Emerald in Matrix

Beryl (Be3Al2Si6O18)

Granite (Granite (Felsic Plutonic Rock)) — igneous

Granite

Granite (Felsic Plutonic Rock)

Ruby (Raw Corundum) (Alumina (Al2O3) with Chromium traces) — gemstone

Ruby (Raw Corundum)

Alumina (Al2O3) with Chromium traces

Olivine Diabase Porphyry (Porphyritic Olivine-Bearing Diabase (Micro-Gabbro)) — igneous

Olivine Diabase Porphyry

Porphyritic Olivine-Bearing Diabase (Micro-Gabbro)

Aventurine (Quartz (SiO2) with Fuchsite inclusions) — mineral

Aventurine

Quartz (SiO2) with Fuchsite inclusions

Emerald (Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities) — mineral

Emerald

Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities

Fossil Snail (Gastropoda (fossilized)) — fossil

Fossil Snail

Gastropoda (fossilized)

Ferruginous Quartzite (also known as Ironstone or Gossan) (Ferruginous Quartzite with Goethite/Hematite staining) — metamorphic

Ferruginous Quartzite (also known as Ironstone or Gossan)

Ferruginous Quartzite with Goethite/Hematite staining

Tumbled Ruby (Corundum (Al2O3:Cr)) — gemstone

Tumbled Ruby

Corundum (Al2O3:Cr)

Basalt Metate (Vesicular Basalt) — igneous

Basalt Metate

Vesicular Basalt

Unidentifiable Rock Fragment — Uncertain

Unidentifiable Rock Fragment

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Granite (River-worn) (Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)) — igneous

Granite (River-worn)

Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)

Granite (Granite (Felsic intrusive igneous rock)) — igneous

Granite

Granite (Felsic intrusive igneous rock)

Diorite (Phaneritic intermediate plutonic rock) — igneous

Diorite

Phaneritic intermediate plutonic rock

Quartz with Muscovite Mica (Silicon Dioxide (SiO2) with Potassium aluminum silicate hydroxide fluoride [KAl2(AlSi3O10)(F,OH)2]) — mineral

Quartz with Muscovite Mica

Silicon Dioxide (SiO2) with Potassium aluminum silicate hydroxide fluoride [KAl2(AlSi3O10)(F,OH)2]

Ferruginous Quartz (Silicon Dioxide (SiO2) with Iron Oxide (Limonite/Hematite)) — mineral

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide (Limonite/Hematite)

Granodiorite (Granodiorite) — igneous

Granodiorite

Granodiorite

Granite (Phaneritic Plutonic Felsic Rock) — igneous

Granite

Phaneritic Plutonic Felsic Rock

Chert / Flint Tool (Cryptocrystalline quartz (SiO2)) — sedimentary

Chert / Flint Tool

Cryptocrystalline quartz (SiO2)

Chert / Flint Arrowhead (Microcrystalline Quartz (SiO2)) — sedimentary

Chert / Flint Arrowhead

Microcrystalline Quartz (SiO2)

Chert / Flint (Artifact) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert / Flint (Artifact)

Microcrystalline Quartz (SiO2)

Nutting Stone / Cupstone (Sandstone or Quartzite) (Sedimentary rock with anthropogenic modification (cupule)) — sedimentary

Nutting Stone / Cupstone (Sandstone or Quartzite)

Sedimentary rock with anthropogenic modification (cupule)

Slag Glass (Silicon dioxide with impurities) — mineral

Slag Glass

Silicon dioxide with impurities

Ruby (Corundum (Aluminum Oxide, Al2O3)) — gemstone

Ruby

Corundum (Aluminum Oxide, Al2O3)

Granite (Phaneritic Felsic Igneous Rock) — igneous

Granite

Phaneritic Felsic Igneous Rock

Morganite (Pink Beryl) (Beryllium aluminum silicate Be3Al2(SiO3)6) — mineral

Morganite (Pink Beryl)

Beryllium aluminum silicate Be3Al2(SiO3)6

Emerald (Beryl (Be3Al2(SiO3)6)) — gemstone

Emerald

Beryl (Be3Al2(SiO3)6)

Quartz Vein / Quartz Matrix (Silicon Dioxide (SiO2)) — mineral

Quartz Vein / Quartz Matrix

Silicon Dioxide (SiO2)