Rock Identifier

Category

Mineral, Sediment

Browse mineral, sediment specimens identified by the Rock Identifier community.

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Diamond (Native Carbon (C)) — mineral

Diamond

Native Carbon (C)

Gold-bearing Quartz (Auriferous Quartz (SiO2 with Native Gold inclusion)) — mineral

Gold-bearing Quartz

Auriferous Quartz (SiO2 with Native Gold inclusion)

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

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

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

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Milky Quartz (among River Rock) (Quartz (Silicon Dioxide, SiO2)) — Mineral

Milky Quartz (among River Rock)

Quartz (Silicon Dioxide, SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz (Beach Pebble) (Quartz (Silicon Dioxide, SiO2)) — mineral

Milky Quartz (Beach Pebble)

Quartz (Silicon Dioxide, SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Iron Gossan (Limonite/Goethite) (Hydrated Iron Oxides (FeO(OH)·nH2O) from oxidation zones) — sedimentary

Iron Gossan (Limonite/Goethite)

Hydrated Iron Oxides (FeO(OH)·nH2O) from oxidation zones

Ruby in Zoisite (Anyolite (Ruby in Zoisite)) — metamorphic

Ruby in Zoisite

Anyolite (Ruby in Zoisite)

Lapis Lazuli (A metamorphic rock primarily composed of lazurite (Na,Ca)8[(S,SO4,Cl)2|(Al6Si6O24)], calcite (CaCO3), and pyrite (FeS2).) — Mineral

Lapis Lazuli

A metamorphic rock primarily composed of lazurite (Na,Ca)8[(S,SO4,Cl)2|(Al6Si6O24)], calcite (CaCO3), and pyrite (FeS2).

Greenschist (Greenschist (chlorite-epidote schist)) — metamorphic

Greenschist

Greenschist (chlorite-epidote schist)

Tiger's Eye (Pseudomorph of Quartz after Crocidolite (SiO2)) — metamorphic

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

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

Emerald

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

Moonstone (Orthoclase (KAlSi3O8), specifically the variety showing adularescence) — mineral

Moonstone

Orthoclase (KAlSi3O8), specifically the variety showing adularescence

Turquoise (Turquoise (Hydrated phosphate of copper and aluminium), CuAl6(PO4)4(OH)8·4H2O) — mineral

Turquoise

Turquoise (Hydrated phosphate of copper and aluminium), CuAl6(PO4)4(OH)8·4H2O

Sodalite (Sodalite - Na8(Al6Si6O24)Cl2) — mineral

Sodalite

Sodalite - Na8(Al6Si6O24)Cl2

Larimar (Pectolite (Blue variety), NaCa2Si3O10(OH)) — mineral

Larimar

Pectolite (Blue variety), NaCa2Si3O10(OH)

Amethyst (Silicon Dioxide (SiO2) with iron impurities) — mineral

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Drill Core Sample (Cylindrical Rock Core (Specific mineralogy varies by extraction site)) — Metamorphic (Likely Gneiss or Schist based on texture)

Drill Core Sample

Cylindrical Rock Core (Specific mineralogy varies by extraction site)

Metamorphic (Likely Gneiss or Schist based on texture)

Arsenopyrite in Quartz/Host Rock (Arsenopyrite (FeAsS)) — mineral

Arsenopyrite in Quartz/Host Rock

Arsenopyrite (FeAsS)

Emerald In Matrix (Beryl (Be3Al2Si6O18) with trace Chromium/Vanadium) — mineral

Emerald In Matrix

Beryl (Be3Al2Si6O18) with trace Chromium/Vanadium

Opal (Hydrated Silica (SiO2·nH2O)) — mineral

Opal

Hydrated Silica (SiO2·nH2O)

Argetine Blue Agate (Chalcendony variant) (Silicon Dioxide (SiO₂)) — mineral

Argetine Blue Agate (Chalcendony variant)

Silicon Dioxide (SiO₂)

Moonstone (Adularia / Orthoclase (KAlSi3O8)) — mineral

Moonstone

Adularia / Orthoclase (KAlSi3O8)

Quartz Geode (partially formed) (Silicon Dioxide (SiO2)) — mineral

Quartz Geode (partially formed)

Silicon Dioxide (SiO2)

Epidote (Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))) — metamorphic

Epidote

Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))

Lapis Lazuli (Complex metamorphic rock containing Lazurite ((Na,Ca)8(AlSiO4)6(SO4,S,Cl)2), Calcite, and Pyrite) — metamorphic

Lapis Lazuli

Complex metamorphic rock containing Lazurite ((Na,Ca)8(AlSiO4)6(SO4,S,Cl)2), Calcite, and Pyrite

Amethyst (Silicon dioxide with iron impurities (SiO2:Fe3+)) — mineral

Amethyst

Silicon dioxide with iron impurities (SiO2:Fe3+)

Red Jasper (Silicon Dioxide with Iron inclusions (SiO2 + Fe2O3)) — sedimentary

Red Jasper

Silicon Dioxide with Iron inclusions (SiO2 + Fe2O3)

Blue Calcite (Calcium Carbonate (CaCO3)) — mineral

Blue Calcite

Calcium Carbonate (CaCO3)

Aquamarine (Rough) (Beryl (Be3Al2Si6O18)) — mineral

Aquamarine (Rough)

Beryl (Be3Al2Si6O18)

Green Aventurine (Silicon Dioxide (SiO2) with Fuchsite inclusions) — metamorphic

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Fuchsite with Ruby (Cr-rich Muscovite with Corundum (K(Al,Cr)2(AlSi3O10)(OH)2)) — metamorphic

Fuchsite with Ruby

Cr-rich Muscovite with Corundum (K(Al,Cr)2(AlSi3O10)(OH)2)

Optical Calcite (Calcium Carbonate (CaCO3)) — mineral

Optical Calcite

Calcium Carbonate (CaCO3)

Black Opal (Hydrated Silica (SiO2·nH2O)) — mineral

Black Opal

Hydrated Silica (SiO2·nH2O)

Alexandrite in Matrix (Chrysoberyl (BeAl2O4 with Chromium)) — mineral

Alexandrite in Matrix

Chrysoberyl (BeAl2O4 with Chromium)

Prasiolite (Silicon Dioxide (SiO2) with iron impurities) — mineral

Prasiolite

Silicon Dioxide (SiO2) with iron impurities

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)