Rock Identifier

Category

Mineralological Specimen

Browse mineralological specimen specimens identified by the Rock Identifier community.

Learn about Mineralological 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

Smoky Quartz

Clear Obsidian

Goshenite Crystal

Goshenite Crystal

Magnetite

Crocoite

Elbaite

Feldspar (likely Amazonite or Plagioclase) (Potassium Aluminum Silicate (KAlSi3O8) or Sodium/Calcium Aluminum Silicate) — mineral

Feldspar (likely Amazonite or Plagioclase)

Potassium Aluminum Silicate (KAlSi3O8) or Sodium/Calcium Aluminum Silicate

Red sandstone (Quartz-rich sandstone, likely iron-oxide-cemented (exact identification requires closer examination)) — sedimentary

Red sandstone

Quartz-rich sandstone, likely iron-oxide-cemented (exact identification requires closer examination)

Greenschist (Greenschist (Chlorite-Epidote-Actinolite Schist)) — metamorphic

Greenschist

Greenschist (Chlorite-Epidote-Actinolite Schist)

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

Quartz (Bull Quartz)

Silicon Dioxide (SiO2)

Granitoid (Common Granite/Gneiss) (Granitoid (primarily Quartz [SiO2], Feldspar [KAlSi3O8], and Mica)) — igneous

Granitoid (Common Granite/Gneiss)

Granitoid (primarily Quartz [SiO2], Feldspar [KAlSi3O8], and Mica)

Granite (likely) (Granite, a coarse-grained intrusive felsic rock composed mainly of quartz, feldspar, and mica) — igneous

Granite (likely)

Granite, a coarse-grained intrusive felsic rock composed mainly of quartz, feldspar, and mica

Unidentified pink-and-green mineral-bearing rock (Not reliably identifiable from the image; possible pink feldspar with green epidote or another green mineral) — mineral

Unidentified pink-and-green mineral-bearing rock

Not reliably identifiable from the image; possible pink feldspar with green epidote or another green mineral

Mixed mineral and rock specimens (Unidentified assortment; visible pieces may include rose quartz, green aventurine, quartz, and a gray crystalline rock, but the image is insufficient for exact identification.) — mineral

Mixed mineral and rock specimens

Unidentified assortment; visible pieces may include rose quartz, green aventurine, quartz, and a gray crystalline rock, but the image is insufficient for exact identification.

Quartz-bearing feldspathic rock, possibly pegmatite (Granite/pegmatitic granitic rock; primarily quartz (SiO₂) and feldspar) — igneous

Quartz-bearing feldspathic rock, possibly pegmatite

Granite/pegmatitic granitic rock; primarily quartz (SiO₂) and feldspar

Weathered iron-rich rock, possibly limonite-bearing sandstone (Limonite/goethite-bearing sandstone or ferruginous conglomeratic rock) — sedimentary

Weathered iron-rich rock, possibly limonite-bearing sandstone

Limonite/goethite-bearing sandstone or ferruginous conglomeratic rock

Polished jasper pendant (Jasper, an opaque microcrystalline variety of quartz (SiO₂), commonly colored by iron oxides) — metamorphic

Polished jasper pendant

Jasper, an opaque microcrystalline variety of quartz (SiO₂), commonly colored by iron oxides

Possible ironstone concretion or weathered mineral nodule (Iron-oxide-rich concretion, likely goethite/limonite; identification uncertain from the photo) — sedimentary

Possible ironstone concretion or weathered mineral nodule

Iron-oxide-rich concretion, likely goethite/limonite; identification uncertain from the photo

Weathered pebble, likely sandstone or quartzite (Indeterminate quartz-rich clastic rock; exact identification requires examination of a fresh surface) — sedimentary

Weathered pebble, likely sandstone or quartzite

Indeterminate quartz-rich clastic rock; exact identification requires examination of a fresh surface

Desert Rose (Gypsum (CaSO4·2H2O) or Baryte (BaSO4)) — mineral

Desert Rose

Gypsum (CaSO4·2H2O) or Baryte (BaSO4)

Agate (Cryptocrystalline quartz (SiO2)) — mineral

Agate

Cryptocrystalline quartz (SiO2)

Sandstone (Iron-stained Pebble) (Sandstone (Quartz/Hematite dominated)) — sedimentary

Sandstone (Iron-stained Pebble)

Sandstone (Quartz/Hematite dominated)

Peanut Wood (Petrified Wood (Silicified Araucaria with Teredo boreholes)) — fossil

Peanut Wood

Petrified Wood (Silicified Araucaria with Teredo boreholes)

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

Amethyst (Silicon Dioxide (SiO2) containing iron impurities and irradiation) — mineral

Amethyst

Silicon Dioxide (SiO2) containing iron impurities and irradiation

Emerald in Host Rock (Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities) — mineral

Emerald in Host Rock

Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities

Tiger's Eye (Silicon dioxide with fibrous inclusions (SiO2)) — mineral

Tiger's Eye

Silicon dioxide with fibrous inclusions (SiO2)

Red Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Red Jasper

Microcrystalline Quartz (SiO2)

Quartz with Tourmaline and Iron Staining (Silicon Dioxide (SiO2) with accessory tourmaline and limonite) — mineral

Quartz with Tourmaline and Iron Staining

Silicon Dioxide (SiO2) with accessory tourmaline and limonite

Jasper (Silicon Dioxide (Microcrystalline Quartz, SiO2)) — sedimentary

Jasper

Silicon Dioxide (Microcrystalline Quartz, SiO2)

Iron Meteorite / Chondrite (Possible) (Extraterrestrial stony-iron or chondritic meteorite) — meteorite

Iron Meteorite / Chondrite (Possible)

Extraterrestrial stony-iron or chondritic meteorite

Agate (Silicon Dioxide (Chalcedony variety), SiO2) — gemstone

Agate

Silicon Dioxide (Chalcedony variety), SiO2

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Geode / Fossilized Gastropod or Shell Cast (Silicon dioxide (Quartz) replacement / fossil mold) — sedimentary

Geode / Fossilized Gastropod or Shell Cast

Silicon dioxide (Quartz) replacement / fossil mold

Brecciated Red Jasper (Microcrystalline Quartz (Chalcedony), SiO2) — sedimentary

Brecciated Red Jasper

Microcrystalline Quartz (Chalcedony), SiO2

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Raw Citrine Quartz (Silicon Dioxide (SiO2)) — mineral

Raw Citrine Quartz

Silicon Dioxide (SiO2)

Yellow Quartz (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz

Silicon Dioxide (SiO2)

Red Jasper (Microcrystalline Quartz (Chalcedony), SiO2) — sedimentary

Red Jasper

Microcrystalline Quartz (Chalcedony), SiO2

Jasper (Silicon Dioxide (SiO2) microcrystalline quartz) — sedimentary

Jasper

Silicon Dioxide (SiO2) microcrystalline quartz

Common Opal (SiO2·nH2O (Hydrated Silicon Dioxide)) — mineraloid

Common Opal

SiO2·nH2O (Hydrated Silicon Dioxide)

Copper Ore (Malachite and Limonite bearing rock) (Copper-bearing rock with secondary copper minerals) — mineral

Copper Ore (Malachite and Limonite bearing rock)

Copper-bearing rock with secondary copper minerals

Quartz Crystal Cluster (Silicon Dioxide (SiO2)) — mineral

Quartz Crystal Cluster

Silicon Dioxide (SiO2)

Green Jasper Pebble (Microcrystalline Quartz (Chalcedony), SiO2) — sedimentary

Green Jasper Pebble

Microcrystalline Quartz (Chalcedony), SiO2

Jasper (Silicon dioxide (SiO2) with impurities, microcrystalline quartz) — sedimentary

Jasper

Silicon dioxide (SiO2) with impurities, microcrystalline quartz

Bismuthinite with Chalcopyrite and Quartz (Bismuthinite (Bi2S3) and Chalcopyrite (CuFeS2)) — mineral

Bismuthinite with Chalcopyrite and Quartz

Bismuthinite (Bi2S3) and Chalcopyrite (CuFeS2)

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

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

Common Opal

Hydrated amorphous silica (SiO2·nH2O)