Rock Identifier

Category

Mineral Specimen

Browse mineral specimen specimens identified by the Rock Identifier community.

Learn about Mineral Specimen in the encyclopedia

Emerald in Matrix

Emerald in Matrix

Aquamarine Matrix

Aquamarine Matrix

Morganite Crystal

Morganite Crystal

Emerald Crystal

Emerald Crystal

Aquamarine Crystal

Aquamarine Crystal

Mushroom Tourmaline

Mushroom Tourmaline

Glauconite

Hutcheonite

Halite

Sperrylite

Baddeleyite

Anatase

Citrine (likely Heat-Treated Amethyst) (Silicon Dioxide (SiO2)) — mineral

Citrine (likely Heat-Treated Amethyst)

Silicon Dioxide (SiO2)

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

Amethyst

Amethyst (Silicon Dioxide, SiO2 with iron impurities)

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

Carnelian Agate

Silicon Dioxide (SiO2) - Variety of Chalcedony

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

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

Labradorite

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

Amethyst (Amethyst (Silicon Dioxide - SiO2 with ferric impurities)) — mineral

Amethyst

Amethyst (Silicon Dioxide - SiO2 with ferric impurities)

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

Amethyst Quartz Pebble

Silicon Dioxide (SiO2) with iron impurities

Tiger's Eye (Pseudomorph of quartz after crocidolite (SiO2 with iron oxide inclusions)) — metamorphic

Tiger's Eye

Pseudomorph of quartz after crocidolite (SiO2 with iron oxide inclusions)

Rose Quartz (Crystalline Silicon Dioxide with trace Titanium/Manganese/Iron (SiO2)) — mineral

Rose Quartz

Crystalline Silicon Dioxide with trace Titanium/Manganese/Iron (SiO2)

Limonite with Opal infusion (FeO(OH)·nH2O (Limonite) / SiO2·nH2O (Opal)) — mineral

Limonite with Opal infusion

FeO(OH)·nH2O (Limonite) / SiO2·nH2O (Opal)

Sandstone (Arenite (SiO2 based)) — sedimentary

Sandstone

Arenite (SiO2 based)

Banded Quartz (Silicon Dioxide (SiO2)) — mineral

Banded Quartz

Silicon Dioxide (SiO2)

Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Quartz Geode

Silicon Dioxide (SiO2)

Sandstone (likely Fossiliferous) (Arenite / Sedimentum arenaceum) — sedimentary

Sandstone (likely Fossiliferous)

Arenite / Sedimentum arenaceum

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

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

Quartz Geode Fragment

Silicon Dioxide (SiO2)

Jasper and Basalt Pebble (Polymineralic lithic pebble) — igneous and sedimentary

Jasper and Basalt Pebble

Polymineralic lithic pebble

igneous and sedimentary

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

Amethyst

Amethyst (Silicon Dioxide, SiO2 with Iron impurities)

Sandstone (Ferruginous) (Arenite (iron-rich)) — sedimentary

Sandstone (Ferruginous)

Arenite (iron-rich)

Milky Quartz with Iron Staining (Silicon Dioxide (SiO2)) — mineral

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Sandstone (Weathered Cobble) (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone (Weathered Cobble)

Clastic sedimentary rock (primarily SiO2)

Fire Opal (Hydrated Silica (SiO2·nH2O)) — mineral

Fire Opal

Hydrated Silica (SiO2·nH2O)

Malachite (Copper carbonate hydroxide [Cu2CO3(OH)2]) — mineral

Malachite

Copper carbonate hydroxide [Cu2CO3(OH)2]

Quartz Geode (Quartz (Silicon Dioxide, SiO2) in a Geode) — sedimentary

Quartz Geode

Quartz (Silicon Dioxide, SiO2) in a Geode

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Amygdaloidal Basalt (Amygdaloidal Basalt) — igneous

Amygdaloidal Basalt

Amygdaloidal Basalt

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

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

Agate

Chalcedony (Silicon Dioxide, SiO2)

Labradorite (Labradorite (a calcium-enriched sodic plagioclase feldspar)) — mineral

Labradorite

Labradorite (a calcium-enriched sodic plagioclase feldspar)

Rough Sapphire (possibly Yellow/Green Corundum) (Corundum (Al2O3)) — mineral

Rough Sapphire (possibly Yellow/Green Corundum)

Corundum (Al2O3)

Iron-Stained Quartz (Silicon Dioxide (SiO2) with Iron Oxide/Limonite coating) — mineral

Iron-Stained Quartz

Silicon Dioxide (SiO2) with Iron Oxide/Limonite coating

Basalt with Epidote (Flowerstone-like texture) (Amygdaloidal Basalt (silicate mineral inclusions)) — igneous

Basalt with Epidote (Flowerstone-like texture)

Amygdaloidal Basalt (silicate mineral inclusions)

Ferruginous Quartz (Silicon Dioxide with Iron Oxide Inclusions (SiO2)) — mineral

Ferruginous Quartz

Silicon Dioxide with Iron Oxide Inclusions (SiO2)

River Quartz (Milky and Smoky mix) (Silicon Dioxide (SiO2)) — mineral

River Quartz (Milky and Smoky mix)

Silicon Dioxide (SiO2)

Bauxite (Hydrated aluminum oxides (mixture of gibbsite, boehmite, and diaspore)) — sedimentary

Bauxite

Hydrated aluminum oxides (mixture of gibbsite, boehmite, and diaspore)

Citrine (Silicon dioxide (SiO2)) — mineral

Citrine

Silicon dioxide (SiO2)

Chrysocolla (Hydrated copper phyllosilicate, (Cu,Al)2H2Si2O5(OH)4·nH2O) — mineral

Chrysocolla

Hydrated copper phyllosilicate, (Cu,Al)2H2Si2O5(OH)4·nH2O

Sandstone with Iron Oxide Concretions (Quartzose Sandstone with Limonite/Hematite) — sedimentary

Sandstone with Iron Oxide Concretions

Quartzose Sandstone with Limonite/Hematite

Bornite (Peacock Ore) (Bornite (Cu5FeS4)) — mineral

Bornite (Peacock Ore)

Bornite (Cu5FeS4)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Quartz Druzy (Geode Fragment)

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)