Rock Identifier

Category

Mineral (Biogenic)

Browse mineral (biogenic) specimens identified by the Rock Identifier community.

Learn about Mineral (Biogenic) in the encyclopedia

Glauconite

Glauconite

Halite

Halite

Hutcheonite

Hutcheonite

Sperrylite

Sperrylite

Baddeleyite

Baddeleyite

Anatase

Anatase

Brookite

Brookite

Talc

Talc

Euxenite

Euxenite

Eltyubyuite

Eltyubyuite

Dolomite

Dolomite

Buergerite

Buergerite

Amygdaloidal Basalt (Basalt with secondary mineral infilling) — igneous

Amygdaloidal Basalt

Basalt with secondary mineral infilling

Limestone with Secondary Mineralization (Calcium Carbonate (CaCO3)) — sedimentary

Limestone with Secondary Mineralization

Calcium Carbonate (CaCO3)

Sandstone (with potential iron mineralization) (Arenite) — sedimentary

Sandstone (with potential iron mineralization)

Arenite

Limonite (with Pyrite) (Limonite (Hydrated Iron Oxide) - FeO(OH)·nH2O) — mineral

Limonite (with Pyrite)

Limonite (Hydrated Iron Oxide) - FeO(OH)·nH2O

Orthoclase Feldspar (Potassium Feldspar (KAlSi3O8)) — mineral

Orthoclase Feldspar

Potassium Feldspar (KAlSi3O8)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Greenstone / Epidosite (Epidosite (Metasomatic rock consisting mainly of Epidite Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH) and Quartz)) — metamorphic

Greenstone / Epidosite

Epidosite (Metasomatic rock consisting mainly of Epidite Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH) and Quartz)

Quartz (Iron-stained) (Silicon Dioxide (SiO2)) — mineral

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Orthoclase Feldspar (KAlSi3O8 (Potassium Aluminum Silicate)) — mineral

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Lapis Lazuli (Lapis Lazuli (Complex aggregate mainly of Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)) — metamorphic

Lapis Lazuli

Lapis Lazuli (Complex aggregate mainly of Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Quartzite (Hydrothermal Quartz or Quartzite (SiO2)) — metamorphic

Quartzite

Hydrothermal Quartz or Quartzite (SiO2)

Lapis Lazuli (Na8[Al6Si6O24]S2 (Lazurite component), a rock composed primarily of Lazurite, Calcite, and Pyrite) — metamorphic

Lapis Lazuli

Na8[Al6Si6O24]S2 (Lazurite component), a rock composed primarily of Lazurite, Calcite, and Pyrite

Quartz with Mafic Inclusions (Silicon Dioxide (SiO2) with host igneous matrix) — igneous

Quartz with Mafic Inclusions

Silicon Dioxide (SiO2) with host igneous matrix

Demitasse Granite (Diorite-Granite transition) (Intermediate Plutonic Rock (Granodiorite/Diorite mix)) — igneous

Demitasse Granite (Diorite-Granite transition)

Intermediate Plutonic Rock (Granodiorite/Diorite mix)

Potassium Feldspar (Orthoclase) (Orthoclase (KAlSi3O8)) — mineral

Potassium Feldspar (Orthoclase)

Orthoclase (KAlSi3O8)

Lapis Lazuli (Lazurite-rich metamorphic rock ((Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)) — metamorphic

Lapis Lazuli

Lazurite-rich metamorphic rock ((Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Greenstone (Metabasalt (composed mainly of chlorite, epidote, and actinolite)) — metamorphic

Greenstone

Metabasalt (composed mainly of chlorite, epidote, and actinolite)

Lapis Lazuli (Sodalite-rich metamorphic rock containing Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2) — metamorphic

Lapis Lazuli

Sodalite-rich metamorphic rock containing Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2

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

Quartz (Milky/Crystal variety)

Silicon Dioxide (SiO2)

Quartz (Yellow/Tan Quartzite Pebble) (Silicon Dioxide (SiO2)) — metamorphic

Quartz (Yellow/Tan Quartzite Pebble)

Silicon Dioxide (SiO2)

Granite (Phaneritic plutonic igneous rock (SiO2 range 65-75%)) — igneous

Granite

Phaneritic plutonic igneous rock (SiO2 range 65-75%)

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

Malachite

Copper(II) carbonate hydroxide [Cu2CO3(OH)2]

Jadeite (NaAlSi2O6; Jadeite silicate mineral) — metamorphic

Jadeite

NaAlSi2O6; Jadeite silicate mineral

Gneiss (specifically a Banded Gneiss pebble) (Gneiss (High-grade Regional Metamorphic Rock)) — metamorphic

Gneiss (specifically a Banded Gneiss pebble)

Gneiss (High-grade Regional Metamorphic Rock)

Apatite (Apatite Group (e.g., Fluorapatite Ca5(PO4)3F, Chlorapatite Ca5(PO4)3Cl, Hydroxylapatite Ca5(PO4)3(OH))) — mineral

Apatite

Apatite Group (e.g., Fluorapatite Ca5(PO4)3F, Chlorapatite Ca5(PO4)3Cl, Hydroxylapatite Ca5(PO4)3(OH))

Serpentinite (Serpentinite) — metamorphic

Serpentinite

Serpentinite

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

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Blue Apatite (Apatite - Ca5(PO4)3(F,Cl,OH)) — mineral

Blue Apatite

Apatite - Ca5(PO4)3(F,Cl,OH)

Prehnite (Ca2Al2Si3O10(OH)2) — mineral

Prehnite

Ca2Al2Si3O10(OH)2

Citrine Quartz (Silicon Dioxide (SiO2)) — mineral

Citrine Quartz

Silicon Dioxide (SiO2)

Emerald in Matrix (Beryl (Be3Al2Si6O18)) — mineral

Emerald in Matrix

Beryl (Be3Al2Si6O18)

Geode (Unopened) (Silicon dioxide with various inclusions (SiO2)) — sedimentary

Geode (Unopened)

Silicon dioxide with various inclusions (SiO2)

Lake Superior Agate (Agate (Cryptocrystalline variety of Quartz, SiO2)) — mineral

Lake Superior Agate

Agate (Cryptocrystalline variety of Quartz, SiO2)

Precious Opal in Matrix (Hydrated Silica (SiO2·nH2O)) — mineral

Precious Opal in Matrix

Hydrated Silica (SiO2·nH2O)

Peridot (Olivine (Mg, Fe)2SiO4) — mineral

Peridot

Olivine (Mg, Fe)2SiO4

Amazonite (Microcline (KAlSi3O8) with lead impurities) — mineral

Amazonite

Microcline (KAlSi3O8) with lead impurities

Citrine (Crystalline Quartz (SiO2) with iron impurities) — mineral

Citrine

Crystalline Quartz (SiO2) with iron impurities

Emerald (Beryl (Be3Al2(SiO3)6) with chromium/vanadium impurities) — mineral

Emerald

Beryl (Be3Al2(SiO3)6) with chromium/vanadium impurities

Barite Rose on Marcasite (Barium Sulfate (BaSO4) on Iron Sulfide (FeS2)) — mineral

Barite Rose on Marcasite

Barium Sulfate (BaSO4) on Iron Sulfide (FeS2)

Red Sandstone (Ferruginous Sandstone (SiO2 dominated with Fe2O3 cement)) — sedimentary

Red Sandstone

Ferruginous Sandstone (SiO2 dominated with Fe2O3 cement)

Arsenopyrite with Schist Matrix (Arsenopyrite (FeAsS)) — mineral

Arsenopyrite with Schist Matrix

Arsenopyrite (FeAsS)