Rock Identifier

Category

Organic Gemstone

Browse organic gemstone specimens identified by the Rock Identifier community.

White Topaz (Topaz [Al2SiO4(F,OH)2]) — mineral

White Topaz

Topaz [Al2SiO4(F,OH)2]

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

Peridot

Olivine ((Mg,Fe)2SiO4)

Mineral
Chert (Flint) (Chert (Silicon Dioxide, SiO2)) — sedimentary

Chert (Flint)

Chert (Silicon Dioxide, SiO2)

sedimentary
Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

metamorphic
Pearl (as a biogenic mineral/gemstone) (Calcium Carbonate (mostly Aragonite), CaCO3) — mineral

Pearl (as a biogenic mineral/gemstone)

Calcium Carbonate (mostly Aragonite), CaCO3

mineral
Opal (Hydrated amorphous silica (SiO2·nH2O)) — mineral

Opal

Hydrated amorphous silica (SiO2·nH2O)

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

Olivine (Peridot)

Magnesium Iron Silicate (Mg,Fe)2SiO4

mineral
Iolite (Cordierite) (Magnesium Iron Aluminum Silicate (Mg,Fe)2Al4Si5O18) — mineral

Iolite (Cordierite)

Magnesium Iron Aluminum Silicate (Mg,Fe)2Al4Si5O18

mineral
Chert (Jasper) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Jasper)

Silicon Dioxide (SiO2)

sedimentary
Diamond in Kimberlite (Diamond (C in Kimberlite Matrix)) — igneous

Diamond in Kimberlite

Diamond (C in Kimberlite Matrix)

igneous
Red Jasper (River Pebble) (Jasper (Silicon Dioxide, SiO2)) — sedimentary

Red Jasper (River Pebble)

Jasper (Silicon Dioxide, SiO2)

sedimentary
Jasper (Silicon Dioxide (SiO2)) — sedimentary

Jasper

Silicon Dioxide (SiO2)

sedimentary
Jasper (specifically Polychrome or Desert Jasper) (Silicon Dioxide with impurities (SiO2)) — Mineral

Jasper (specifically Polychrome or Desert Jasper)

Silicon Dioxide with impurities (SiO2)

Mineral
Jasper (specifically Brecciated or Agated Jasper) (Silicon Dioxide (SiO2) - Chalcedony with impurities) — Mineral / Sedimentary

Jasper (specifically Brecciated or Agated Jasper)

Silicon Dioxide (SiO2) - Chalcedony with impurities

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

Rhodonite

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

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

Red Jasper

Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)

sedimentary
Green Moonstone (Garnierite) (Nickel-bearing Magnesium Silicate (often a mix of Serpentine and Talc/Chlorite groups)) — mineral

Green Moonstone (Garnierite)

Nickel-bearing Magnesium Silicate (often a mix of Serpentine and Talc/Chlorite groups)

mineral
Unakite (or Epidotized Granite) (Epidotized Granite (Composition: KAlSi3O8, Ca2(Al,Fe)3(SiO4)3(OH), SiO2)) — metamorphic

Unakite (or Epidotized Granite)

Epidotized Granite (Composition: KAlSi3O8, Ca2(Al,Fe)3(SiO4)3(OH), SiO2)

metamorphic
Rhodonite in Quartz Matrix (Rhodonite (Manganese Silicate - (Mn,Fe,Mg,Ca)SiO3)) — mineral

Rhodonite in Quartz Matrix

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

mineral
Jasper (specifically Yellow and Red Jasper/Chert) (Silicon Dioxide (SiO2) with Iron Oxide inclusions) — sedimentary

Jasper (specifically Yellow and Red Jasper/Chert)

Silicon Dioxide (SiO2) with Iron Oxide inclusions

sedimentary
Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

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

White Quartz (Milky Quartz)

Quartz (Silicon Dioxide - SiO2)

mineral
Unakite (Epidotized Granite) — metamorphic

Unakite

Epidotized Granite

metamorphic
Dragon Blood Jasper (Lizard Stone/Septarian Chalcedony) (Epidote with Black Hornblende and White Quartz mixture) — metamorphic

Dragon Blood Jasper (Lizard Stone/Septarian Chalcedony)

Epidote with Black Hornblende and White Quartz mixture

metamorphic
Chert (Flint) (Chert (SiO2)) — sedimentary

Chert (Flint)

Chert (SiO2)

sedimentary
Raw Citrine (Citrine (Silicon Dioxide - SiO2)) — mineral

Raw Citrine

Citrine (Silicon Dioxide - SiO2)

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

Aquamarine

Beryl (Be3Al2Si6O18 with Iron traces)

mineral
Black Obsidian (Volcanic Glass (Primary composition: SiO2 - Silicon Dioxide)) — igneous

Black Obsidian

Volcanic Glass (Primary composition: SiO2 - Silicon Dioxide)

igneous
Caribbean Calcite (Calcium Carbonate with Argonite (CaCO3)) — mineral

Caribbean Calcite

Calcium Carbonate with Argonite (CaCO3)

mineral
Amethyst (Digital/Conceptual Representation) (Amethyst (Silicon Dioxide with iron impurities, SiO2)) — mineral

Amethyst (Digital/Conceptual Representation)

Amethyst (Silicon Dioxide with iron impurities, SiO2)

mineral
Red Jasper (Silicon dioxide (SiO2)) — mineral

Red Jasper

Silicon dioxide (SiO2)

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

Quartz

Quartz (Silicon Dioxide, SiO2)

mineral
Chert (Yellow or Ochre Jasper variant) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Yellow or Ochre Jasper variant)

Microcrystalline Quartz (SiO2)

sedimentary
Clear Quartz Point (Silicon Dioxide (SiO2)) — mineral

Clear Quartz Point

Silicon Dioxide (SiO2)

mineral
Rough Sapphire (Corundum (Al2O3)) — mineral

Rough Sapphire

Corundum (Al2O3)

mineral
Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

mineral
Kyanite in Quartz (Kyanite (Al2SiO5) with Quartz (SiO2) matrix) — metamorphic

Kyanite in Quartz

Kyanite (Al2SiO5) with Quartz (SiO2) matrix

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

Milky Quartz

Silicon Dioxide (SiO2)

mineral
Amazonite (Potassium Feldspar (Microcline) - KAlSi3O8) — mineral

Amazonite

Potassium Feldspar (Microcline) - KAlSi3O8

mineral
Magnetite (Iron Ore) (Magnetite (Fe3O4)) — mineral

Magnetite (Iron Ore)

Magnetite (Fe3O4)

mineral
Quartz Pebble (Chert/Chalcedony) (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble (Chert/Chalcedony)

Silicon Dioxide (SiO2)

mineral
Carnelian (Red Chalcedony) (Silicon Dioxide (SiO2)) — mineral

Carnelian (Red Chalcedony)

Silicon Dioxide (SiO2)

mineral