Rock Identifier

Category

Organic Gemstone (Not A Rock Or Mineral In The Traditional Sense, But Bio Mineralized Material)

Browse organic gemstone (not a rock or mineral in the traditional sense, but bio mineralized material) specimens identified by the Rock Identifier community.

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Amethyst

Quartz (Silicon Dioxide with Iron impurities), SiO2

Rose Quartz (SiO2 (Silicon Dioxide with trace amounts of titanium, iron, or manganese)) — mineral

Rose Quartz

SiO2 (Silicon Dioxide with trace amounts of titanium, iron, or manganese)

Amazonite (Microcline (KAlSi3O8)) — mineral

Amazonite

Microcline (KAlSi3O8)

Greenstone / Nephrite Jade (Tremolite-actinolite series (Ca2(Mg,Fe)5Si8O22(OH)2)) — metamorphic

Greenstone / Nephrite Jade

Tremolite-actinolite series (Ca2(Mg,Fe)5Si8O22(OH)2)

Quartz with Mica inclusions (Pegmatite) (Silicon Dioxide (SiO2) with Muscovite/Biotite inclusions) — igneous

Quartz with Mica inclusions (Pegmatite)

Silicon Dioxide (SiO2) with Muscovite/Biotite inclusions

Quartz (Small Fragment) (Silicon Dioxide (SiO2)) — mineral

Quartz (Small Fragment)

Silicon Dioxide (SiO2)

Diamond (Natural Carbon (C)) — mineral

Diamond

Natural Carbon (C)

Quartz (worked as a tool or artifact) (Silicon Dioxide (SiO2)) — mineral

Quartz (worked as a tool or artifact)

Silicon Dioxide (SiO2)

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Turquoise (possible Dyed Howlite or Magnesite imitation) (CuAl6(PO4)4(OH)8·4H2O (Turquoise)) — mineral

Turquoise (possible Dyed Howlite or Magnesite imitation)

CuAl6(PO4)4(OH)8·4H2O (Turquoise)

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Botryoidal Chalcedony (Silicon Dioxide (SiO2)) — mineral

Botryoidal Chalcedony

Silicon Dioxide (SiO2)

Mica Schist (Mica Schist (primarily composed of Muscovite/Biotite)) — metamorphic

Mica Schist

Mica Schist (primarily composed of Muscovite/Biotite)

Opalite (Synthetic Opalized Glass) (Synthetic Silicon Dioxide (SiO2) glass) — mineral

Opalite (Synthetic Opalized Glass)

Synthetic Silicon Dioxide (SiO2) glass

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

Quartz (Smoky Quartz variant)

Silicon Dioxide (SiO2)

Snakeskin Agate (Agate (Cryptocrystalline Quartz, SiO2)) — mineral

Snakeskin Agate

Agate (Cryptocrystalline Quartz, SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Cream River Jasper (Silicified microcrystalline quartz (SiO2)) — sedimentary

Cream River Jasper

Silicified microcrystalline quartz (SiO2)

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

Turquoise

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

Mica Schist (Mica Schist (KAl2(AlSi3O10)(OH)2 / K(Mg,Fe)3AlSi3O10(OH)2 mixed with SiO2)) — metamorphic

Mica Schist

Mica Schist (KAl2(AlSi3O10)(OH)2 / K(Mg,Fe)3AlSi3O10(OH)2 mixed with SiO2)

Quartz fragment (Silicon dioxide (SiO2)) — mineral

Quartz fragment

Silicon dioxide (SiO2)

Mahogany Obsidian (Volcanic glass containing Magnetite/Hematite) — igneous

Mahogany Obsidian

Volcanic glass containing Magnetite/Hematite

Quartz (possibly Citrine or Smoky Quartz variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (possibly Citrine or Smoky Quartz variety)

Silicon Dioxide (SiO2)

Rutilated Quartz (Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions) — mineral

Rutilated Quartz

Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions

Pyrite (Fool's Gold) (Iron Disulfide (FeS2)) — mineral

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz (Milky/Crystalline fragment) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Crystalline fragment)

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Pyrite (Iron disulfide (FeS2)) — mineral

Pyrite

Iron disulfide (FeS2)

Yellow Calcite (Calcite (Calcium Carbonate, CaCO3)) — mineral

Yellow Calcite

Calcite (Calcium Carbonate, CaCO3)

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

Quartz on Matrix

Silicon Dioxide (SiO2)

Quartz (Small Fragment) (Silicon Dioxide (SiO2)) — mineral

Quartz (Small Fragment)

Silicon Dioxide (SiO2)

Chert (Flint variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Flint variety)

Microcrystalline Quartz (SiO2)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Rhodolite Garnet (Mg3Al2(SiO4)3 - Fe3Al2(SiO4)3 (Pyrope-Almandine series)) — mineral

Rhodolite Garnet

Mg3Al2(SiO4)3 - Fe3Al2(SiO4)3 (Pyrope-Almandine series)

Garnet in Matrix (Schist or Quartz) (Almandine Garnet, Fe3Al2(SiO4)3) — metamorphic

Garnet in Matrix (Schist or Quartz)

Almandine Garnet, Fe3Al2(SiO4)3

Quartz (Pale Rose or Milky Variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Pale Rose or Milky Variety)

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

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

Quartz (Milky to Clear)

Silicon Dioxide (SiO2)