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

Chalcedony (Agate / Chert) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Agate / Chert)

Silicon Dioxide (SiO2)

Chalcedony / Agate Pebble (Silicon Dioxide (SiO2)) — mineral

Chalcedony / Agate Pebble

Silicon Dioxide (SiO2)

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

Red Jasper (with Quartz)

Silicon Dioxide (SiO2) with Hematite inclusions

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

Amethyst Quartz Crust

Crystalline Silicon Dioxide with Iron impurities (SiO2)

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

Amethyst (Tumbled Stone)

Amethyst (Silicon Dioxide with Iron impurities, SiO2)

Red Moss Agate or Jasper-Agate (Silicon Dioxide (SiO2)) — mineral

Red Moss Agate or Jasper-Agate

Silicon Dioxide (SiO2)

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

Chrysocolla on Matrix

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

Quartzite with inclusions or a banded chert (Quartzite or Chert) — Metamorphic or Sedimentary

Quartzite with inclusions or a banded chert

Quartzite or Chert

Metamorphic or Sedimentary

Gold Ore in Quartz (Auriferous Quartz (Gold: Au; Quartz: SiO2)) — Mineral

Gold Ore in Quartz

Auriferous Quartz (Gold: Au; Quartz: SiO2)

White Marble (Recrystallized Calcite (CaCO3)) — metamorphic

White Marble

Recrystallized Calcite (CaCO3)

Gneiss (Gneiss (High-grade Metamorphic Rock)) — metamorphic

Gneiss

Gneiss (High-grade Metamorphic Rock)

Banded Jasper (Silicate Mineral (Microcrystalline Quartz / SiO2)) — sedimentary

Banded Jasper

Silicate Mineral (Microcrystalline Quartz / SiO2)

Quartz (Milky/Smoky variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Smoky variety)

Silicon Dioxide (SiO2)

Banded Calcite (Calcite (Calcium Carbonate, CaCO3)) — mineral

Banded Calcite

Calcite (Calcium Carbonate, CaCO3)

Banded Agate (Chalcedony / Silicon Dioxide (SiO2)) — mineral

Banded Agate

Chalcedony / Silicon Dioxide (SiO2)

Blue Calcite (Calcium Carbonate (CaCO3)) — mineral

Blue Calcite

Calcium Carbonate (CaCO3)

Rose Quartz (Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese) — mineral

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Granitic Gneiss Pebble (Gneiss (felsic metamorphic rock)) — metamorphic

Granitic Gneiss Pebble

Gneiss (felsic metamorphic rock)

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

Quartz Crystal Cluster on Matrix

Silicon Dioxide (SiO2)

Sandstone (Sedimentary Rock (Quartz Arenite)) — sedimentary

Sandstone

Sedimentary Rock (Quartz Arenite)

Fossilized ammonite (Ammonoidea (likely a ribbed Jurassic–Cretaceous ammonite), replaced mainly by calcite or silica) — fossil

Fossilized ammonite

Ammonoidea (likely a ribbed Jurassic–Cretaceous ammonite), replaced mainly by calcite or silica

Quartz Geode (Cracked Open) (Quartz (Silicon Dioxide - SiO2)) — mineral

Quartz Geode (Cracked Open)

Quartz (Silicon Dioxide - SiO2)

Quartz / Rock Crystal (Silicon Dioxide (SiO2)) — mineral

Quartz / Rock Crystal

Silicon Dioxide (SiO2)

Quartzite Pebble (Metamorphic Quartzite (predominantly SiO2)) — metamorphic

Quartzite Pebble

Metamorphic Quartzite (predominantly SiO2)

Orthoclase (Potassium) Feldspar in Quartz (KAlSi3O8 (Potassium Aluminum Silicate)) — igneous

Orthoclase (Potassium) Feldspar in Quartz

KAlSi3O8 (Potassium Aluminum Silicate)

Phantom Quartz with Chlorite and Hematite inclusions (Silicon Dioxide (SiO2) with inclusions of Chlorite group minerals and Hematite (Fe2O3)) — mineral

Phantom Quartz with Chlorite and Hematite inclusions

Silicon Dioxide (SiO2) with inclusions of Chlorite group minerals and Hematite (Fe2O3)

Chalcedony (Grey/White Agate) (Silicon Dioxide (SiO₂)) — mineral

Chalcedony (Grey/White Agate)

Silicon Dioxide (SiO₂)

Glacial Granite with Epidote (Granite featuring Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))) — igneous

Glacial Granite with Epidote

Granite featuring Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))

Weathered gray-green pebble (Indeterminate; possibly altered basalt, serpentinite, or a greenish metamorphic rock) — mineral

Weathered gray-green pebble

Indeterminate; possibly altered basalt, serpentinite, or a greenish metamorphic rock

Red Jasper (Microcrystalline Quartz (Chalcedony), SiO2 with iron oxide inclusions) — sedimentary

Red Jasper

Microcrystalline Quartz (Chalcedony), SiO2 with iron oxide inclusions

Tumbled Ruby (Corundum (Al2O3)) — gemstone

Tumbled Ruby

Corundum (Al2O3)

Leopard Jasper (Microcrystalline Quartz (SiO2) with mineral inclusions) — sedimentary

Leopard Jasper

Microcrystalline Quartz (SiO2) with mineral inclusions

Jasper and Chalcedony Nodule (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Jasper and Chalcedony Nodule

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Graphic Granite (or Rapakivi-textured Granite) (Alkali feldspar granite) — igneous

Graphic Granite (or Rapakivi-textured Granite)

Alkali feldspar granite

Fossil Coral (Hexagonaria or Rugose coral fossil (replaced by silica/chalcedony)) — fossil

Fossil Coral

Hexagonaria or Rugose coral fossil (replaced by silica/chalcedony)

Aventurine (Silicon Dioxide (Quartz with Fuchsite inclusions) - SiO2) — mineral

Aventurine

Silicon Dioxide (Quartz with Fuchsite inclusions) - SiO2

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

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Desert Rose (Gypsum Rose) (Calcium Sulfate Dihydrate (CaSO4·2H2O)) — mineral

Desert Rose (Gypsum Rose)

Calcium Sulfate Dihydrate (CaSO4·2H2O)

Amethyst (Rough) (Amethyst (SiO2 with Iron impurities)) — mineral

Amethyst (Rough)

Amethyst (SiO2 with Iron impurities)

Blue Calcite (Calcium Carbonate (CaCO3)) — mineral

Blue Calcite

Calcium Carbonate (CaCO3)

Moldavite (Moldavite (Silica-rich glass, SiO2 + Al2O3)) — tektite

Moldavite

Moldavite (Silica-rich glass, SiO2 + Al2O3)

Rose Quartz (Silicon Dioxide (SiO2)) — mineral

Rose Quartz

Silicon Dioxide (SiO2)