Rock Identifier

Category

Mineralogical Specimen

Browse mineralogical specimen specimens identified by the Rock Identifier community.

Learn about Mineralogical Specimen in the encyclopedia

Emerald in Matrix

Emerald in Matrix

Morganite Crystal

Morganite Crystal

Aquamarine Matrix

Aquamarine Matrix

Emerald Crystal

Emerald Crystal

Aquamarine Crystal

Aquamarine Crystal

Mushroom Tourmaline

Mushroom Tourmaline

White Beryl

Smoky Quartz

Clear Obsidian

Goshenite Crystal

Goshenite Crystal

Magnetite

Crocoite

Banded Igneous Dike Rock (Intrusive igneous rock with felsic/mafic banding) — igneous

Banded Igneous Dike Rock

Intrusive igneous rock with felsic/mafic banding

Quartz pebble (Silicon dioxide (SiO2)) — mineral

Quartz pebble

Silicon dioxide (SiO2)

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

Milky Quartz with Iron Staining

Quartz (SiO2)

Carnelian (Tumbled Pebble) (Quartz (Variety: Carnelian, SiO2)) — gemstone

Carnelian (Tumbled Pebble)

Quartz (Variety: Carnelian, SiO2)

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

Amethyst

Quartz (Silicon Dioxide, SiO2)

Quartz-veined Jasper (Microcrystalline quartz (SiO2) with quartz veins) — sedimentary

Quartz-veined Jasper

Microcrystalline quartz (SiO2) with quartz veins

White Agate / Chalcedony (Silicon Dioxide (SiO2)) — gemstone

White Agate / Chalcedony

Silicon Dioxide (SiO2)

Tiger's Eye (Silicon Dioxide (Quartz pseudomorph after crocidolite), SiO2) — mineral

Tiger's Eye

Silicon Dioxide (Quartz pseudomorph after crocidolite), SiO2

Hemimorphite (Hemimorphite (Zn4Si2O7(OH)2·H2O)) — mineral

Hemimorphite

Hemimorphite (Zn4Si2O7(OH)2·H2O)

Mixed River Pebbles and Rock Collection (Polymictic lithic conglomerate, sandstone, and quartz pebbles) — sedimentary

Mixed River Pebbles and Rock Collection

Polymictic lithic conglomerate, sandstone, and quartz pebbles

Jasper and Chalcedony Pebble (Silicon Dioxide (SiO2)) — sedimentary

Jasper and Chalcedony Pebble

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Epidote with Quartz Vein (Epidote-bearing metamorphic rock with quartz (Ca2(Al,Fe)3(SiO4)3(OH))) — metamorphic

Epidote with Quartz Vein

Epidote-bearing metamorphic rock with quartz (Ca2(Al,Fe)3(SiO4)3(OH))

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz (Milky or Yellow/Citrine Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky or Yellow/Citrine Quartz)

Silicon Dioxide (SiO2)

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

Agate

Silicon Dioxide (Chalcedony), SiO2

Banded Sedimentary Rock (Sedimentary rock with Liesegang banding) — sedimentary

Banded Sedimentary Rock

Sedimentary rock with Liesegang banding

Ametrine (Quartz (Silicon Dioxide, SiO2)) — gemstone

Ametrine

Quartz (Silicon Dioxide, SiO2)

White Quartz (Silicon Dioxide (SiO2)) — mineral

White Quartz

Silicon Dioxide (SiO2)

Quartz (Agate/Jasper pebble) (Silicon dioxide (SiO2)) — mineral

Quartz (Agate/Jasper pebble)

Silicon dioxide (SiO2)

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

Amethyst

Quartz (Silicon Dioxide, SiO2)

Tumbled Black Tourmaline (Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)4)) — mineral

Tumbled Black Tourmaline

Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)4)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Dumortierite in Quartz (Silicon Dioxide with Aluminium Borosilicate (SiO2 + (Al,Fe7+)7(BO3)(SiO4)3O3)) — mineral

Dumortierite in Quartz

Silicon Dioxide with Aluminium Borosilicate (SiO2 + (Al,Fe7+)7(BO3)(SiO4)3O3)

Quartz (Agate/Jasper pebble) (Silicon Dioxide (SiO2)) — mineral

Quartz (Agate/Jasper pebble)

Silicon Dioxide (SiO2)

Quartz Crystal Cluster with Iron Stain (Silicon Dioxide (SiO2)) — mineral

Quartz Crystal Cluster with Iron Stain

Silicon Dioxide (SiO2)

Worn River Pebble with Fossil Indentation (Sedimentary Rock with Fossil Infill) — sedimentary

Worn River Pebble with Fossil Indentation

Sedimentary Rock with Fossil Infill

Banded Jasper and Quartz Pebble (Silicified sedimentary rock / Chalcedony (SiO2)) — sedimentary

Banded Jasper and Quartz Pebble

Silicified sedimentary rock / Chalcedony (SiO2)

Aquamarine (Beryl (Be3Al2(SiO3)6)) — gemstone

Aquamarine

Beryl (Be3Al2(SiO3)6)

Prehnite (Prehnite (Ca2Al2Si3O10(OH)2)) — mineral

Prehnite

Prehnite (Ca2Al2Si3O10(OH)2)

Fire Agate (Chalcedony (SiO2)) — gemstone

Fire Agate

Chalcedony (SiO2)

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

Jasper

Silicon Dioxide (Quartz variety, SiO2)

Quartzite Pebble with Pyrite Coating (SiO2 (Quartz) with FeS2 (Pyrite) inclusions or surface coating) — metamorphic

Quartzite Pebble with Pyrite Coating

SiO2 (Quartz) with FeS2 (Pyrite) inclusions or surface coating

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

Amethyst Quartz Crystal

Silicon Dioxide (SiO2) with iron impurities

Red Jasper (Jasper (Silicon Dioxide, SiO2)) — sedimentary

Red Jasper

Jasper (Silicon Dioxide, SiO2)

Milky Quartz in Shale (Silicon Dioxide (SiO2) in sedimentary host rock) — mineral

Milky Quartz in Shale

Silicon Dioxide (SiO2) in sedimentary host rock

Septarian Nodule (Sphere) (Septarian (composed of Calcite, Aragonite, and Limestone/Claystone)) — sedimentary

Septarian Nodule (Sphere)

Septarian (composed of Calcite, Aragonite, and Limestone/Claystone)

Glendonite (Calcite Pseudomorph after Ikaite) (Calcite (CaCO3) pseudomorph after Ikaite (CaCO3·6H2O)) — mineral

Glendonite (Calcite Pseudomorph after Ikaite)

Calcite (CaCO3) pseudomorph after Ikaite (CaCO3·6H2O)

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

Amethyst

Quartz (Silicon Dioxide with Iron impurities), SiO2

Ferruginous Quartz (Silicon Dioxide (SiO2) with hematite/limonite inclusions) — mineral

Ferruginous Quartz

Silicon Dioxide (SiO2) with hematite/limonite inclusions

Gold bearing Quartz with Sulfides (Auriferous Quartz with Pyrite/Arsenopyrite (Au + SiO2)) — mineral

Gold bearing Quartz with Sulfides

Auriferous Quartz with Pyrite/Arsenopyrite (Au + SiO2)