Rock Identifier

Category

Mineral (Native Element Alloy)

Browse mineral (native element alloy) specimens identified by the Rock Identifier community.

Learn about Mineral (Native Element Alloy) in the encyclopedia

Sulfur

Copper

Gold

Platinum

Silver

Glauconite

Hutcheonite

Halite

Sperrylite

Baddeleyite

Anatase

Brookite

Yellow Quartz (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz

Silicon Dioxide (SiO2)

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

Tiger's Eye

Silicon dioxide with crocidolite inclusions (SiO2)

Quartz in Host Rock (Silicon Dioxide (SiO2)) — mineral

Quartz in Host Rock

Silicon Dioxide (SiO2)

Quartz Crystal in Matrix (Silicon Dioxide (SiO2)) — mineral

Quartz Crystal in Matrix

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz (White/Milky Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (White/Milky Quartz)

Silicon Dioxide (SiO2)

Quartz Geode (Silicon Dioxide (SiO2)) — sedimentary

Quartz Geode

Silicon Dioxide (SiO2)

Quartz (Orange/Pink variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Orange/Pink variety)

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

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

Amethyst

Quartz (Silicon Dioxide, SiO2)

Quartz (Rose Quartz / Quartz Pebble) (Silicon Dioxide (SiO2)) — mineral

Quartz (Rose Quartz / Quartz Pebble)

Silicon Dioxide (SiO2)

Emerald in Quartz Matrix (Beryl (Be3Al2Si6O18) with trace Chromium/Vanadium) — gemstone

Emerald in Quartz Matrix

Beryl (Be3Al2Si6O18) with trace Chromium/Vanadium

Amazonite (Microcline (KAlSi3O8)) — mineral

Amazonite

Microcline (KAlSi3O8)

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

Amethyst (Rough)

Silicon Dioxide (SiO2) with iron impurities

Citrine (Silicon Dioxide (SiO2)) — gemstone

Citrine

Silicon Dioxide (SiO2)

Quartz Druzy on Matrix (Silicon Dioxide (SiO2)) — mineral

Quartz Druzy on Matrix

Silicon Dioxide (SiO2)

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)

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

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

Lake Superior Agate

Agate (Cryptocrystalline variety of Quartz, SiO2)

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

Granite (Felsic intrusive igneous rock) — igneous

Granite

Felsic intrusive igneous rock

Granite (Felsic intrusive igneous rock) — igneous

Granite

Felsic intrusive igneous rock

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

Sandstone (with potential iron mineralization)

Arenite

Olivine (Peridot) (Magnesium Iron Silicate (Mg, Fe)2SiO4) — Mineral

Olivine (Peridot)

Magnesium Iron Silicate (Mg, Fe)2SiO4

Brecciated Jasper (Silicon Dioxide (SiO2) with mineral impurities) — sedimentary

Brecciated Jasper

Silicon Dioxide (SiO2) with mineral impurities

Quartz Geode (Crystalline Silicon Dioxide (SiO2) within a nodule) — sedimentary

Quartz Geode

Crystalline Silicon Dioxide (SiO2) within a nodule

Rounded quartz-rich pebble (Likely milky quartz (SiO₂), possibly quartzite or a quartz-rich river pebble) — mineral

Rounded quartz-rich pebble

Likely milky quartz (SiO₂), possibly quartzite or a quartz-rich river pebble

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Dyed Agate Geode (Pink/Magenta) (Silicon Dioxide (SiO2) - variety of Chalcedony/Quartz) — mineral

Dyed Agate Geode (Pink/Magenta)

Silicon Dioxide (SiO2) - variety of Chalcedony/Quartz

Clear Quartz (Double Terminated) (Silicon Dioxide (SiO2)) — mineral

Clear Quartz (Double Terminated)

Silicon Dioxide (SiO2)

Sedimentary Rock (Limestone or Siltstone pebble) (Sedimentary rock fragment) — sedimentary

Sedimentary Rock (Limestone or Siltstone pebble)

Sedimentary rock fragment

Granite fragment (Felsic intrusive igneous rock; mainly quartz, alkali feldspar, plagioclase, and minor biotite/hornblende) — igneous

Granite fragment

Felsic intrusive igneous rock; mainly quartz, alkali feldspar, plagioclase, and minor biotite/hornblende

Quartz Boulder (Silicon Dioxide (SiO2)) — mineral

Quartz Boulder

Silicon Dioxide (SiO2)

Quartz pebble (Silicon dioxide (SiO2)) — sedimentary

Quartz pebble

Silicon dioxide (SiO2)