Rock Identifier

Category

Organic Gemstone

Browse organic gemstone specimens identified by the Rock Identifier community.

Learn about Organic Gemstone in the encyclopedia

Jet

Jet

Sapropel

Sapropel

Red Garnet

Red Garnet

Bituminous Shale

Bituminous Shale

Black Shale

Black Shale

Petrified Wood

Petrified Wood

Amber

Amber

Peat

Peat

Oil Shale

Oil Shale

Pearl

Pearl

Lizard Skin Jasper

Lizard Skin Jasper

Rhodonite

Rhodonite

Diamond (appearing in jewelry) (Diamond (pure Carbon, C)) — mineral

Diamond (appearing in jewelry)

Diamond (pure Carbon, C)

Amethyst and Citrine (Ametrine Mix) (Silicon Dioxide (SiO2) with Fe3+ impurities) — mineral

Amethyst and Citrine (Ametrine Mix)

Silicon Dioxide (SiO2) with Fe3+ impurities

Peridotite (Olivine/Peridot) (Peridotite (comprising (Mg,Fe)2SiO4)) — igneous

Peridotite (Olivine/Peridot)

Peridotite (comprising (Mg,Fe)2SiO4)

Peridot (Olivine (Mg, Fe)₂SiO₄) — mineral

Peridot

Olivine (Mg, Fe)₂SiO₄

Peach Moonstone (Orthoclase Feldspar (KAlSi3O8) with inclusions) — mineral

Peach Moonstone

Orthoclase Feldspar (KAlSi3O8) with inclusions

Eclogite (Eclogite (composed primarily of Omphacite and Pyrope Garnet)) — metamorphic

Eclogite

Eclogite (composed primarily of Omphacite and Pyrope Garnet)

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

Sunstone

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

Kunzite (Spodumene) (Spodumene (LiAlSi2O6)) — mineral

Kunzite (Spodumene)

Spodumene (LiAlSi2O6)

Pearl (Aragonite and Calcite (CaCO3) with Conchiolin) — mineral

Pearl

Aragonite and Calcite (CaCO3) with Conchiolin

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

Sunstone

Plagioclase Feldspar (Na,Ca)(Si,Al)4O8

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Smoky Quartz (Silicon Dioxide (SiO2) with aluminum impurities) — mineral

Smoky Quartz

Silicon Dioxide (SiO2) with aluminum impurities

Banded Agate (specifically Lake Superior Agate style) (Agate (Cryptocrystalline Quartz, SiO2)) — mineral

Banded Agate (specifically Lake Superior Agate style)

Agate (Cryptocrystalline Quartz, SiO2)

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

Smoky Quartz

Smoky Quartz (SiO2: Silicon Dioxide)

Dzi Bead Necklace (Agate/Carnelian) (Chalcedony (cryptocrystalline Quartz), SiO2) — gemstone

Dzi Bead Necklace (Agate/Carnelian)

Chalcedony (cryptocrystalline Quartz), SiO2

Carnelian (Polished Cabochon) (Silicon Dioxide (SiO2) with iron oxide impurities) — gemstone

Carnelian (Polished Cabochon)

Silicon Dioxide (SiO2) with iron oxide impurities

Diamond (C (Carbon)) — gemstone

Diamond

C (Carbon)

Diamond (Carbon (C)) — gemstone

Diamond

Carbon (C)

Diamond (or Diamond Simulant) (Carbon (C)) — gemstone

Diamond (or Diamond Simulant)

Carbon (C)

Diamond (Natural Diamond (Carbon, C)) — gemstone

Diamond

Natural Diamond (Carbon, C)

Diamond (Carbon (C)) — gemstone

Diamond

Carbon (C)

Diamond (or Simulant) (Carbon (C)) — gemstone

Diamond (or Simulant)

Carbon (C)

Diamond (or Cubic Zirconia) (Carbon (C) or Zirconium Dioxide (ZrO2)) — gemstone

Diamond (or Cubic Zirconia)

Carbon (C) or Zirconium Dioxide (ZrO2)

Diamond (Carbon (C)) — gemstone

Diamond

Carbon (C)

Diamond (Faceted) (Carbon (C)) — gemstone

Diamond (Faceted)

Carbon (C)

Cubic Zirconia (CZ) (Cubic Zirconium Dioxide (ZrO2)) — gemstone

Cubic Zirconia (CZ)

Cubic Zirconium Dioxide (ZrO2)

Cubic Zirconia (Jewelry Setting) (Cubic Zirconia (ZrO2)) — gemstone

Cubic Zirconia (Jewelry Setting)

Cubic Zirconia (ZrO2)

Black Onyx (Chalcedony (Silicon Dioxide, SiO2)) — gemstone

Black Onyx

Chalcedony (Silicon Dioxide, SiO2)

Botswana Agate (Banded Chalcedony (SiO2)) — gemstone

Botswana Agate

Banded Chalcedony (SiO2)

Diamond (Heart Cut) (Carbon (C)) — gemstone

Diamond (Heart Cut)

Carbon (C)

Diamond (Carbon (C)) — gemstone

Diamond

Carbon (C)

Carnelian (Carnelian Agate (SiO2)) — gemstone

Carnelian

Carnelian Agate (SiO2)

Diamond (in Jewelry Setting) (Carbon (C)) — gemstone

Diamond (in Jewelry Setting)

Carbon (C)

Diamond (Carbon (C)) — gemstone

Diamond

Carbon (C)

Rainbow Moonstone (White Labradorite (Plagioclase Feldspar), (Na,Ca)(Al,Si)4O8) — gemstone

Rainbow Moonstone

White Labradorite (Plagioclase Feldspar), (Na,Ca)(Al,Si)4O8

Emerald in Matrix (Beryl (Be3Al2Si6O18) with Quartz/Schist) — gemstone

Emerald in Matrix

Beryl (Be3Al2Si6O18) with Quartz/Schist

Morganite and Aquamarine (Beryl) Bracelet (Beryllium aluminum silicate, Be3Al2(SiO3)6) — gemstone

Morganite and Aquamarine (Beryl) Bracelet

Beryllium aluminum silicate, Be3Al2(SiO3)6

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

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Agate (Silicon dioxide (SiO2)) — gemstone

Agate

Silicon dioxide (SiO2)

White Buffalo Turquoise (or Howlite/Magnesite) (Calcite/Dolomite or Magnesite with Chert/Quartz inclusions) — gemstone

White Buffalo Turquoise (or Howlite/Magnesite)

Calcite/Dolomite or Magnesite with Chert/Quartz inclusions

Larimar (NaCa2Si3O8(OH)) — gemstone

Larimar

NaCa2Si3O8(OH)

Chrysocolla in Quartz (Chrysocolla (Cu,Al)2H2Si2O5(OH)4·nH2O in Quartz (SiO2)) — gemstone

Chrysocolla in Quartz

Chrysocolla (Cu,Al)2H2Si2O5(OH)4·nH2O in Quartz (SiO2)