Rock Identifier

Category

Mineral, Sediment

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

Ocean Jasper Mushroom (Orbicular Jasper (Silicon Dioxide, SiO2 mixed with various impurities)) — mineral

Ocean Jasper Mushroom

Orbicular Jasper (Silicon Dioxide, SiO2 mixed with various impurities)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Pyrite Sun (Pyrite Dollar) (Iron Disulfide (FeS2)) — mineral

Pyrite Sun (Pyrite Dollar)

Iron Disulfide (FeS2)

Botryoidal Chalcedony (Agate/Carnelian) (Chalcedony (SiO2)) — mineral

Botryoidal Chalcedony (Agate/Carnelian)

Chalcedony (SiO2)

Peridot (Olivine) ((Mg,Fe)2SiO4 (Magnesium Iron Silicate)) — mineral

Peridot (Olivine)

(Mg,Fe)2SiO4 (Magnesium Iron Silicate)

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

Rough Precious Opal

Hydrated Silica (SiO2·nH2O)

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lithium-bearing Phyllosilicate)) — mineral

Lepidolite

K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lithium-bearing Phyllosilicate)

Fire Agate (Rough) (Silicon Dioxide (SiO2) - Variety of Chalcedony) — mineral

Fire Agate (Rough)

Silicon Dioxide (SiO2) - Variety of Chalcedony

Rhodonite (Manganese Silicate (Mn,Fe,Mg,Ca)SiO3) — Mineral

Rhodonite

Manganese Silicate (Mn,Fe,Mg,Ca)SiO3

Specular Hematite (Specularite) (Iron Oxide (Fe2O3)) — mineral

Specular Hematite (Specularite)

Iron Oxide (Fe2O3)

Green Aventurine (Quartz (Silicon Dioxide) with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)) — mineral

Green Aventurine

Quartz (Silicon Dioxide) with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)

Clear Quartz (Quartz (Silicon Dioxide, SiO2)) — mineral

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Blue Tiger's Eye (Hawk's Eye) (Silicified Crocidolite (Silicon Dioxide with inclusions of Crocidolite), SiO2) — Mineral

Blue Tiger's Eye (Hawk's Eye)

Silicified Crocidolite (Silicon Dioxide with inclusions of Crocidolite), SiO2

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

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Sunstone (Oligoclase (Plagioclase Feldspar Group) - (Ca, Na)(Al, Si)4O8) — mineral

Sunstone

Oligoclase (Plagioclase Feldspar Group) - (Ca, Na)(Al, Si)4O8

Iron-stained Quartz (Silicon Dioxide (SiO2) with Limonite/Hematite inclusions) — mineral

Iron-stained Quartz

Silicon Dioxide (SiO2) with Limonite/Hematite inclusions

Amethyst (SiO2 (Silicon Dioxide) - Purple variety of Quartz) — mineral

Amethyst

SiO2 (Silicon Dioxide) - Purple variety of Quartz

Amazonite (Potassium Feldspar (Microcline) - K(AlSi3O8)) — Mineral

Amazonite

Potassium Feldspar (Microcline) - K(AlSi3O8)

Rhodonite (Manganese Silicate (Mn,Fe,Mg,Ca)SiO3) — mineral

Rhodonite

Manganese Silicate (Mn,Fe,Mg,Ca)SiO3

Yellow Jasper (Silicon Dioxide (SiO2) with iron impurities) — mineral

Yellow Jasper

Silicon Dioxide (SiO2) with iron impurities

Green Aura Quartz (Silicon Dioxide (SiO2) bonded with metallic vapors (typically Gold, Chromium, or Titanium)) — mineral

Green Aura Quartz

Silicon Dioxide (SiO2) bonded with metallic vapors (typically Gold, Chromium, or Titanium)

Quartz Druze (on Matrix) (Silicon Dioxide (SiO2)) — mineral

Quartz Druze (on Matrix)

Silicon Dioxide (SiO2)

Aquamarine (Beryl (Be3Al2Si6O18 with iron traces)) — mineral

Aquamarine

Beryl (Be3Al2Si6O18 with iron traces)

Bloodstone (Heliotrope) (Silicon Dioxide (SiO2) with inclusions of Iron Oxide or Chlorite) — mineral

Bloodstone (Heliotrope)

Silicon Dioxide (SiO2) with inclusions of Iron Oxide or Chlorite

Pyrite (on Shale/Matrix) (Iron Disulfide (FeS2)) — mineral

Pyrite (on Shale/Matrix)

Iron Disulfide (FeS2)

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

Clear Quartz (Rock Crystal Fragments)

Silicon Dioxide (SiO2)

Sunstone (Plagioclase Feldspar (Na, Ca)(Al, Si)4O8 with Hematite or Copper inclusions) — mineral

Sunstone

Plagioclase Feldspar (Na, Ca)(Al, Si)4O8 with Hematite or Copper inclusions

Rose Quartz (Silicon Dioxide (SiO2)) — mineral

Rose Quartz

Silicon Dioxide (SiO2)

Chrysoberyl (Cyclic Twin) (Beryllium Aluminum Oxide (BeAl2O4)) — mineral

Chrysoberyl (Cyclic Twin)

Beryllium Aluminum Oxide (BeAl2O4)

Sodalite (Na8(Al6Si6O24)Cl2 (Sodium Aluminum Silicate Chloride)) — mineral

Sodalite

Na8(Al6Si6O24)Cl2 (Sodium Aluminum Silicate Chloride)

Biotite Schist (Biotite Schist) — Metamorphic

Biotite Schist

Biotite Schist

Botryoidal Hematite (Kidney Ore) (Hematite (Fe2O3)) — Mineral

Botryoidal Hematite (Kidney Ore)

Hematite (Fe2O3)

River Cobble (likely Sandstone or Siltstone type) (Sandstone or Siltstone (common rock types that form river cobbles)) — Sedimentary Rock (specifically a clastic sedimentary rock formed into a cobble)

River Cobble (likely Sandstone or Siltstone type)

Sandstone or Siltstone (common rock types that form river cobbles)

Sedimentary Rock (specifically a clastic sedimentary rock formed into a cobble)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Lepidolite on Pegmatite (Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)) — mineral

Lepidolite on Pegmatite

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)

Kimberlite (Kimberlite (Potassic ultramafic volcanic rock)) — igneous

Kimberlite

Kimberlite (Potassic ultramafic volcanic rock)

Goethite (Goethite (α-FeO(OH))) — Mineral

Goethite

Goethite (α-FeO(OH))

Druzzy Quartz on Matrix (Silicon Dioxide (SiO2)) — mineral

Druzzy Quartz on Matrix

Silicon Dioxide (SiO2)

Diorite (Salt and Pepper Rock) (Diorite) — igneous

Diorite (Salt and Pepper Rock)

Diorite

Diorite (Diorite (Intermediate intrusive igneous rock)) — igneous

Diorite

Diorite (Intermediate intrusive igneous rock)

Gneiss (Stream-worn Cobble) (Gneiss (Metamorphic rock composed primarily of Quartz, Feldspar, and Mica)) — metamorphic

Gneiss (Stream-worn Cobble)

Gneiss (Metamorphic rock composed primarily of Quartz, Feldspar, and Mica)

Charoite (Charoite (Hydrated potassium sodium calcium barium strontium silicate hydroxyfluoride)) — metamorphic

Charoite

Charoite (Hydrated potassium sodium calcium barium strontium silicate hydroxyfluoride)