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

Faceted color-change gemstone, likely synthetic alexandrite or glass imitation (Alexandrite: chrysoberyl, BeAl₂O₄; exact identification requires gemological testing) — gemstone

Faceted color-change gemstone, likely synthetic alexandrite or glass imitation

Alexandrite: chrysoberyl, BeAl₂O₄; exact identification requires gemological testing

Copper-bearing Quartz (with Malachite and Iron Oxides) (Quartz (SiO2) with Malachite (Cu2CO3(OH)2) and Hematite/Limonite (Fe2O3)) — Mineral Specimen

Copper-bearing Quartz (with Malachite and Iron Oxides)

Quartz (SiO2) with Malachite (Cu2CO3(OH)2) and Hematite/Limonite (Fe2O3)

Mineral Specimen

Polished yellow calcite (Calcite (calcium carbonate, CaCO₃)) — mineral

Polished yellow calcite

Calcite (calcium carbonate, CaCO₃)

Calcite (Honey Calcite and Agate) (Calcium Carbonate (CaCO3)) — mineral

Calcite (Honey Calcite and Agate)

Calcium Carbonate (CaCO3)

Chalcopyrite (Copper Iron Sulfide (CuFeS2)) — mineral

Chalcopyrite

Copper Iron Sulfide (CuFeS2)

Blue Calcite (Calcium Carbonate (CaCO3)) — mineral

Blue Calcite

Calcium Carbonate (CaCO3)

Limestone with Quartz Vugs (CaCO3 with SiO2 inclusions) — sedimentary

Limestone with Quartz Vugs

CaCO3 with SiO2 inclusions

Pegmatite with Tourmaline (Igneous Pegmatite (Quartz-Feldspar matrix with Schorl Tourmaline)) — igneous

Pegmatite with Tourmaline

Igneous Pegmatite (Quartz-Feldspar matrix with Schorl Tourmaline)

K-Feldspar (Potassium Feldspar / Pink Feldspar) (KAlSi3O8 (Potassium Aluminum Silicate)) — mineral

K-Feldspar (Potassium Feldspar / Pink Feldspar)

KAlSi3O8 (Potassium Aluminum Silicate)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Weathered sandstone or granitic rock fragment (Likely quartz-rich sandstone; exact identification requires testing) — sedimentary

Weathered sandstone or granitic rock fragment

Likely quartz-rich sandstone; exact identification requires testing

Copper Ore with Malachite (Cuprite and Malachite in host rock (Cu2O and Cu2CO3(OH)2)) — mineral

Copper Ore with Malachite

Cuprite and Malachite in host rock (Cu2O and Cu2CO3(OH)2)

Quartz Mineral (Silicon Dioxide (SiO2)) — mineral

Quartz Mineral

Silicon Dioxide (SiO2)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

K-Feldspar (Potassium Feldspar (Orthoclase/Microcline), KAlSi3O8) — mineral

K-Feldspar

Potassium Feldspar (Orthoclase/Microcline), KAlSi3O8

Quartz Druzy (Silicon Dioxide (SiO2)) — mineral

Quartz Druzy

Silicon Dioxide (SiO2)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Lepidolite (K(Li,Al)3(Al,Si,V)4O10(F,OH)2) — mineral

Lepidolite

K(Li,Al)3(Al,Si,V)4O10(F,OH)2

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

Limonite (FeO(OH)·n(H2O)) — mineral

Limonite

FeO(OH)·n(H2O)

Copper Ore (Malachite and Limonite bearing) (Cuprite, Malachite, and Limonite mixture) — mineral

Copper Ore (Malachite and Limonite bearing)

Cuprite, Malachite, and Limonite mixture

Yellow Quartz (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz

Silicon Dioxide (SiO2)

Microcline Feldspar (Amazonite or White Feldspar) (KAlSi3O8) — mineral

Microcline Feldspar (Amazonite or White Feldspar)

KAlSi3O8

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

Quartz with Iron Oxide

Silicon Dioxide (SiO2)

K-Feldspar / Granite Fragment (Potassium Feldspar (Microcline/Orthoclase) with Quartz) — igneous

K-Feldspar / Granite Fragment

Potassium Feldspar (Microcline/Orthoclase) with Quartz

K-Feldspar (Potassium Feldspar) (Microcline / Orthoclase (KAlSi3O8)) — mineral

K-Feldspar (Potassium Feldspar)

Microcline / Orthoclase (KAlSi3O8)

K-Feldspar (Potassium Feldspar) (KAlSi3O8) — mineral

K-Feldspar (Potassium Feldspar)

KAlSi3O8

K-feldspar (Potassium Feldspar) (Potassium Feldspar (KAlSi3O8)) — mineral

K-feldspar (Potassium Feldspar)

Potassium Feldspar (KAlSi3O8)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

Chrysocolla with Malachite (Cu2-xAlx(H2-xSi2O5)(OH)4%CnH2O (Chrysocolla)) — mineral

Chrysocolla with Malachite

Cu2-xAlx(H2-xSi2O5)(OH)4%CnH2O (Chrysocolla)

K-Feldspar (Potassium Feldspar) (Potassium Feldspar (KAlSi3O8)) — mineral

K-Feldspar (Potassium Feldspar)

Potassium Feldspar (KAlSi3O8)

Mica / Muscovite or Biotite (Phyllosilicate mineral group (e.g., KAl2(AlSi3O10)(OH)2)) — mineral

Mica / Muscovite or Biotite

Phyllosilicate mineral group (e.g., KAl2(AlSi3O10)(OH)2)

Chalcopyrite (Peacock Ore) (Chalcopyrite (CuFeS2)) — mineral

Chalcopyrite (Peacock Ore)

Chalcopyrite (CuFeS2)

Mica (Muscovite or Biotite) (Sheet silicate mineral group (e.g., KAl2(AlSi3O10)(F,OH)2)) — mineral

Mica (Muscovite or Biotite)

Sheet silicate mineral group (e.g., KAl2(AlSi3O10)(F,OH)2)

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

Feldspar

Aluminosilicate (KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8)

Lepidolite (K(Li,Al)3(Al,Si,3O8)2(F,OH)2) — mineral

Lepidolite

K(Li,Al)3(Al,Si,3O8)2(F,OH)2

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

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

Chrysocolla

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

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Amethyst (Quartz (SiO2)) — mineral

Amethyst

Quartz (SiO2)