Rock Identifier

Category

Mineral

Browse mineral specimens identified by the Rock Identifier community.

Learn about Mineral in the encyclopedia

Tsilaisite

Tsilaisite

Spiderweb Jasper

Spiderweb Jasper

Mica

Mica

Lead Feldspar

Lead Feldspar

Maskelynite

Maskelynite

Liddicoatite

Liddicoatite

Sard

Sard

Kimzeyite

Kimzeyite

Knorringite

Knorringite

Zincite

Zincite

Willemite

Willemite

Plazolite

Plazolite

Chalcedony (Yellow Agate) (Cryptocrystalline Quartz (SiO2)) — mineral

Chalcedony (Yellow Agate)

Cryptocrystalline Quartz (SiO2)

Calcite on Host Rock (Calcium Carbonate (CaCO3)) — mineral

Calcite on Host Rock

Calcium Carbonate (CaCO3)

Emerald in Matrix (Quartz/Calcite) (Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities) — mineral

Emerald in Matrix (Quartz/Calcite)

Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities

Vanadinite on Matrix (Vanadinite (Pb5(VO4)3Cl)) — mineral

Vanadinite on Matrix

Vanadinite (Pb5(VO4)3Cl)

Citrine (likely Heat-Treated Amethyst) (Silicon Dioxide (SiO2)) — mineral

Citrine (likely Heat-Treated Amethyst)

Silicon Dioxide (SiO2)

Clear Quartz (Silicon dioxide (SiO2)) — mineral

Clear Quartz

Silicon dioxide (SiO2)

Desert Rose (Baryte/Gypsum) (Barium sulfate (BaSO4) or Hydrated calcium sulfate (CaSO4·2H2O)) — mineral

Desert Rose (Baryte/Gypsum)

Barium sulfate (BaSO4) or Hydrated calcium sulfate (CaSO4·2H2O)

Rose Quartz (Silicon Dioxide (SiO2)) — mineral

Rose Quartz

Silicon Dioxide (SiO2)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Moldavite (Tektite (Impact Glass), ~80% SiO2 + Al2O3) — tektite

Moldavite

Tektite (Impact Glass), ~80% SiO2 + Al2O3

Stichtite in Serpentine (Atlantasite) (Mg6Cr2CO3(OH)16·4H2O in Mg3Si2O5(OH)4) — metamorphic

Stichtite in Serpentine (Atlantasite)

Mg6Cr2CO3(OH)16·4H2O in Mg3Si2O5(OH)4

Quartz Geode (Silicon Dioxide (SiO2) in a concretion) — sedimentary

Quartz Geode

Silicon Dioxide (SiO2) in a concretion

Quartz Geode (Quartz (Silicon Dioxide, SiO2) Geode) — sedimentary

Quartz Geode

Quartz (Silicon Dioxide, SiO2) Geode

Dyed Quartz Geode (Silicon Dioxide (SiO2) with artificial pigment) — mineral

Dyed Quartz Geode

Silicon Dioxide (SiO2) with artificial pigment

Jasper Beads (Polished) (Silicon Dioxide (SiO2)) — sedimentary

Jasper Beads (Polished)

Silicon Dioxide (SiO2)

Desert Rose (Gypsum (variety Selenite) or Barite, CaSO4·2H2O) — mineral

Desert Rose

Gypsum (variety Selenite) or Barite, CaSO4·2H2O

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

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Opal (Hydrated silica (SiO2·nH2O)) — mineraloid

Opal

Hydrated silica (SiO2·nH2O)

Chalcedony (Common Opal or Agate) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Common Opal or Agate)

Silicon Dioxide (SiO2)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

Fire Opal (in matrix) (Hydrated Silica (SiO2·nH2O)) — Mineraloid

Fire Opal (in matrix)

Hydrated Silica (SiO2·nH2O)

Botryoidal Chalcedony (Silicon Dioxide (SiO2)) — mineral

Botryoidal Chalcedony

Silicon Dioxide (SiO2)

Amethyst (Crystalline Quartz (SiO2) with iron impurities) — mineral

Amethyst

Crystalline Quartz (SiO2) with iron impurities

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

Opal

Hydrated Amorphous Silica (SiO2·nH2O)

Herkimer Diamond (Quartz) (Silicon Dioxide (SiO2)) — mineral

Herkimer Diamond (Quartz)

Silicon Dioxide (SiO2)

Chalcedony with Druzy Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Chalcedony with Druzy Quartz Geode

Silicon Dioxide (SiO2)

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

Sodalite

Sodalite, Na8(Al6Si6O24)Cl2

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

Amethyst

Quartz (Silicon Dioxide with iron impurities), SiO2

Orange Quartz (Citrine Quartz) (Silicon Dioxide (SiO2) with iron impurities) — mineral

Orange Quartz (Citrine Quartz)

Silicon Dioxide (SiO2) with iron impurities

Citrine Quartz Geode (Silicon Dioxide (SiO2) with iron impurities) — mineral

Citrine Quartz Geode

Silicon Dioxide (SiO2) with iron impurities

Quartz (Smoky Quartz variant) (Silicon Dioxide (SiO2)) — mineral

Quartz (Smoky Quartz variant)

Silicon Dioxide (SiO2)

Zoisite with Ruby / Anyolite (Anyolite (Ca2Al3(SiO4)3(OH) with Chromian Zoisite and Tschermakite inclusions)) — metamorphic

Zoisite with Ruby / Anyolite

Anyolite (Ca2Al3(SiO4)3(OH) with Chromian Zoisite and Tschermakite inclusions)

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

Amethyst (Quartz variety)

Silicon Dioxide (SiO2) with iron impurities

Beryl (Emerald Variety) (Beryllium aluminum silicate (Be3Al2(SiO3)6)) — mineral

Beryl (Emerald Variety)

Beryllium aluminum silicate (Be3Al2(SiO3)6)

Rough Quartz (with Feldspar inclusions) (Silicon Dioxide (SiO2)) — Mineral

Rough Quartz (with Feldspar inclusions)

Silicon Dioxide (SiO2)

Sapphirine in Matrix (Sapphirine (Mg,Al)8(Al,Si)6O20) — mineral

Sapphirine in Matrix

Sapphirine (Mg,Al)8(Al,Si)6O20

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

Garden Quartz (Phantom Quartz) (Silicon Dioxide (SiO2) with various inclusions (often Chlorite, Hematite, or Iron)) — mineral

Garden Quartz (Phantom Quartz)

Silicon Dioxide (SiO2) with various inclusions (often Chlorite, Hematite, or Iron)

Red Sandstone (Arenite (with Iron Oxide / Hematite staining)) — sedimentary

Red Sandstone

Arenite (with Iron Oxide / Hematite staining)

Red Sandstone (Arenite (Ferruginous Sandstone)) — sedimentary

Red Sandstone

Arenite (Ferruginous Sandstone)

Jasper containing epidote (Unakite-like) (Epidotized Jasper (SiO2 with Ca2(Al,Fe)3(SiO4)3(OH))) — metamorphic

Jasper containing epidote (Unakite-like)

Epidotized Jasper (SiO2 with Ca2(Al,Fe)3(SiO4)3(OH))