Rock Identifier

Category

Gemstone

Browse gemstone specimens identified by the Rock Identifier community.

Learn about Gemstone in the encyclopedia

Achroite

Alexandrite

Almandine Garnet

Almandine Garnet

Amber

Andamooka Opal

Andesine

Andesine-Labradorite

Andesine-Labradorite

Andradite Garnet

Andradite Garnet

Ant Hill Garnet

Ant Hill Garnet

Aquamarine

Australian Opal

Australian Opal

Aventurine Feldspar

Aventurine Feldspar

Pearl (Biogenic Calcium Carbonate (Aragonite and Conchiolin), CaCO3) — mineral

Pearl

Biogenic Calcium Carbonate (Aragonite and Conchiolin), CaCO3

Amethyst (Silicon Dioxide (SiO2)) — mineral

Amethyst

Silicon Dioxide (SiO2)

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

Rhodonite

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

Emerald (Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities) — mineral

Emerald

Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities

Jasper (Silicon dioxide (SiO2) with iron oxide inclusions) — sedimentary

Jasper

Silicon dioxide (SiO2) with iron oxide inclusions

Turquoise (Dyed Howlite/Magnesite) (CuAl6(PO4)4(OH)8·4H2O (Natural Turquoise) or Ca2B5SiO9(OH)5 (Howlite)) — mineral

Turquoise (Dyed Howlite/Magnesite)

CuAl6(PO4)4(OH)8·4H2O (Natural Turquoise) or Ca2B5SiO9(OH)5 (Howlite)

Lapis Lazuli (Lapis lazuli (a metamorphic rock primarily composed of Lazurite, (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)) — metamorphic

Lapis Lazuli

Lapis lazuli (a metamorphic rock primarily composed of Lazurite, (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Pearl (Aragonite (CaCO3) with Conchiolin) — mineral

Pearl

Aragonite (CaCO3) with Conchiolin

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

Quartz Geode Fragment

Silicon Dioxide (SiO2)

Quartz Crystal Geode / Druzy Cluster (Silicon Dioxide (SiO2)) — mineral

Quartz Crystal Geode / Druzy Cluster

Silicon Dioxide (SiO2)

Eye Agate (Band Chalcedony (Silicon Dioxide, SiO2)) — mineral

Eye Agate

Band Chalcedony (Silicon Dioxide, SiO2)

Jasper (Mookaite / Brecciated Jasper) (Microcrystalline Quartz (SiO2 with iron oxide inclusions)) — sedimentary

Jasper (Mookaite / Brecciated Jasper)

Microcrystalline Quartz (SiO2 with iron oxide inclusions)

Red Aventurine (Strawberry Quartz / Sunstone Quartz) (Silicon Dioxide with Hematite/Goethite inclusions (SiO2)) — mineral

Red Aventurine (Strawberry Quartz / Sunstone Quartz)

Silicon Dioxide with Hematite/Goethite inclusions (SiO2)

Feldspar (KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8 (Feldspar group)) — mineral

Feldspar

KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8 (Feldspar group)

Green Aventurine (Quartz (SiO2) with inclusions) — mineral

Green Aventurine

Quartz (SiO2) with inclusions

Que Sera Stone (Llanite with Feldspar and Quartz) (Rhyolite with blue quartz and pink orthoclase (Llanite-type quartz porphyry)) — igneous

Que Sera Stone (Llanite with Feldspar and Quartz)

Rhyolite with blue quartz and pink orthoclase (Llanite-type quartz porphyry)

Fossil Coral / Petrifed Coral Agate (Silicified Anthozoa (Agatized Coral)) — fossil

Fossil Coral / Petrifed Coral Agate

Silicified Anthozoa (Agatized Coral)

Quartz Geode (Silicon Dioxide (SiO2)) — sedimentary

Quartz Geode

Silicon Dioxide (SiO2)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Heliodor (Yellow Beryl) / Greenish-Yellow Beryl (Beryl (Be3Al2Si6O18)) — mineral

Heliodor (Yellow Beryl) / Greenish-Yellow Beryl

Beryl (Be3Al2Si6O18)

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

Unakite (Altered Granite (Epidotized Granite)) — metamorphic

Unakite

Altered Granite (Epidotized Granite)

Tektite (Indochinite) (Natural glass (High-silica impact glass)) — mineral

Tektite (Indochinite)

Natural glass (High-silica impact glass)

Red Jasper (Jasper (variety of Chert) - SiO2) — sedimentary

Red Jasper

Jasper (variety of Chert) - SiO2

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Quartz Fragment (Silicon Dioxide (SiO2)) — mineral

Quartz Fragment

Silicon Dioxide (SiO2)

Carnelian (Chalcedony) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — mineral

Carnelian (Chalcedony)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Rhodochrosite (Manganese Carbonate (MnCO3)) — mineral

Rhodochrosite

Manganese Carbonate (MnCO3)

Rhodochrosite (Manganese Carbonate (MnCO3)) — mineral

Rhodochrosite

Manganese Carbonate (MnCO3)

Red Jasper (SiO2 (Silicon Dioxide with Hematite inclusions)) — mineral

Red Jasper

SiO2 (Silicon Dioxide with Hematite inclusions)

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

Amethyst (Scepter Quartz)

Silicon Dioxide (SiO2) with Iron impurities

Labradorite (Labradorite (Ca,Na)(Al,Si)4O8) — mineral

Labradorite

Labradorite (Ca,Na)(Al,Si)4O8

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

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Amazonite (Microcline (KAlSi3O8 with traces of Lead)) — mineral

Amazonite

Microcline (KAlSi3O8 with traces of Lead)

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

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Clear Quartz (Silicon dioxide (SiO2)) — mineral

Clear Quartz

Silicon dioxide (SiO2)

Red Quartzite (Quartzite (SiO2 with iron oxide inclusions)) — metamorphic

Red Quartzite

Quartzite (SiO2 with iron oxide inclusions)

Black Opal (Kalimaya) (Hydrated Silica (SiO2·nH2O)) — mineraloid

Black Opal (Kalimaya)

Hydrated Silica (SiO2·nH2O)

Amazonite (Microcline (KAlSi3O8) with trace lead/water inclusions) — mineral

Amazonite

Microcline (KAlSi3O8) with trace lead/water inclusions

Carnelian (SiO2 (Microcrystalline Quartz / Chalcedony)) — mineral

Carnelian

SiO2 (Microcrystalline Quartz / Chalcedony)