Rock Identifier

Category

Mineral (Processed Alloy)

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

Mystic Topaz (Aluminum Silicate Fluoride Hydroxide (Al2SiO4(F,OH)2) with metallic film coating) — mineral

Mystic Topaz

Aluminum Silicate Fluoride Hydroxide (Al2SiO4(F,OH)2) with metallic film coating

Quartz Crystal (specifically a Double-Terminated variety) (Silicon Dioxide (SiO2) - Low Quartz) — mineral

Quartz Crystal (specifically a Double-Terminated variety)

Silicon Dioxide (SiO2) - Low Quartz

Mica (Biotite or Phlogopite variety) (Phyllosilicate (complex mineral formula involving K, Mg, Fe, Al, Si, and O)) — mineral

Mica (Biotite or Phlogopite variety)

Phyllosilicate (complex mineral formula involving K, Mg, Fe, Al, Si, and O)

Marble (Recrystallized Calcite Rock (CaCO3)) — metamorphic

Marble

Recrystallized Calcite Rock (CaCO3)

Dalmatian Jasper (Dalmatian Stone (Arfvedsonite/Albite Microquartz)) — igneous

Dalmatian Jasper

Dalmatian Stone (Arfvedsonite/Albite Microquartz)

Tiger's Eye (Pseudomorph of Quartz after Crocidolite (SiO2 with Iron Oxide inclusions)) — metamorphic

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with Iron Oxide inclusions)

Petrified Wood (Silicified Wood (SiO2)) — metamorphic

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Green Aventurine (Silicon dioxide (SiO2) with inclusions of Fuchsite mica) — metamorphic

Green Aventurine

Silicon dioxide (SiO2) with inclusions of Fuchsite mica

Porphyritic Granite (or Porphyry) (Porphyritic Igneous Rock) — igneous

Porphyritic Granite (or Porphyry)

Porphyritic Igneous Rock

Greenschist (Greenschist (composed of Chlorite, Actinolite, and Epidote)) — metamorphic

Greenschist

Greenschist (composed of Chlorite, Actinolite, and Epidote)

Red Jasper (Chert) (Silicon Dioxide (SiO2) with Iron Oxide inclusions) — sedimentary

Red Jasper (Chert)

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Biotite Mica (K(Mg,Fe2+)3(Al,Fe3+)Si3O10(OH,F)2) — Mineral

Biotite Mica

K(Mg,Fe2+)3(Al,Fe3+)Si3O10(OH,F)2

Quartz Pebble (Silicon Dioxide (SiO2)) — Mineral (occurring as a rolled clast)

Quartz Pebble

Silicon Dioxide (SiO2)

Mineral (occurring as a rolled clast)

Porphyritic Granite pebble (or Porphyry) (Porphyritic Plutonic Igneous Rock (Granite / Monzonite porphyry)) — igneous

Porphyritic Granite pebble (or Porphyry)

Porphyritic Plutonic Igneous Rock (Granite / Monzonite porphyry)

Greenstone / Greenschist (Greenschist (composed of Chlorite, Epidote, and Actinolite)) — metamorphic

Greenstone / Greenschist

Greenschist (composed of Chlorite, Epidote, and Actinolite)

Serpentinite (Serpentinite (complex silicate minerals including lizardite, chrysotile, and antigorite: (Mg,Fe)3Si2O5(OH)4)) — metamorphic

Serpentinite

Serpentinite (complex silicate minerals including lizardite, chrysotile, and antigorite: (Mg,Fe)3Si2O5(OH)4)

Granodiorite / Granite (Weathered) (Granodiorite) — Igneous

Granodiorite / Granite (Weathered)

Granodiorite

Weathered Pyrite Nodule (Iron Sulfide (FeS2) undergoing oxidation to limonite/goethite) — mineral

Weathered Pyrite Nodule

Iron Sulfide (FeS2) undergoing oxidation to limonite/goethite

Amazonite (likely mixed with other feldspars/minerals) (Amazonite is a variety of Microcline, which is a tectosilicate mineral, formula KAISi3O8. The mixed beads could include other feldspars or quartz.) — Mineral

Amazonite (likely mixed with other feldspars/minerals)

Amazonite is a variety of Microcline, which is a tectosilicate mineral, formula KAISi3O8. The mixed beads could include other feldspars or quartz.

Biotite Schist (likely) (Biotite Schist (rock), Biotite (mineral)) — Metamorphic

Biotite Schist (likely)

Biotite Schist (rock), Biotite (mineral)

Beads (likely glass or man-made material) (N/A (artificial material)) — Man-made material, not a natural rock or mineral specimen

Beads (likely glass or man-made material)

N/A (artificial material)

Man-made material, not a natural rock or mineral specimen

Serpentinite (Serpentinite (composed primarily of Serpentine group minerals: (Mg, Fe)3Si2O5(OH)4)) — metamorphic

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals: (Mg, Fe)3Si2O5(OH)4)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Granite (Granite (a common term for a felsic intrusive igneous rock)) — igneous

Granite

Granite (a common term for a felsic intrusive igneous rock)

Yellow quartz, possibly citrine (Quartz (SiO₂), yellow variety likely citrine; may also be iron-stained quartz) — mineral

Yellow quartz, possibly citrine

Quartz (SiO₂), yellow variety likely citrine; may also be iron-stained quartz

Tumbled yellow jasper or serpentine (Jasper: microcrystalline quartz (SiO₂); possible serpentine: Mg₃Si₂O₅(OH)₄) — mineral

Tumbled yellow jasper or serpentine

Jasper: microcrystalline quartz (SiO₂); possible serpentine: Mg₃Si₂O₅(OH)₄

Citrine (Heat-treated) (Silicon Dioxide (SiO2)) — mineral

Citrine (Heat-treated)

Silicon Dioxide (SiO2)

Cubic Zirconia (Simulated Diamond) (Cubic Zirconia (ZrO2)) — mineral

Cubic Zirconia (Simulated Diamond)

Cubic Zirconia (ZrO2)

Jasper (Silicon Dioxide (SiO2)) — mineral

Jasper

Silicon Dioxide (SiO2)

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

Citrine Quartz

Citrine (Silicon Dioxide, SiO2)

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

Quartz Vein in Host Rock

Silicon Dioxide (SiO2)

Ferruginous Quartz (Silicon Dioxide (SiO2) with Hematite/Limonite impurities) — mineral

Ferruginous Quartz

Silicon Dioxide (SiO2) with Hematite/Limonite impurities

Red Jasper (Silicon Dioxide (SiO2) with Hematite impurities) — mineral

Red Jasper

Silicon Dioxide (SiO2) with Hematite impurities

Quartz (specifically Citrine or Yellow Quartzite pebble) (Silicon Dioxide (SiO2)) — mineral

Quartz (specifically Citrine or Yellow Quartzite pebble)

Silicon Dioxide (SiO2)

Yellow Quartz (Citrine/Quartzite Pebble) (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz (Citrine/Quartzite Pebble)

Silicon Dioxide (SiO2)

Yellow Quartz or Citrine Geode/Cluster (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz or Citrine Geode/Cluster

Silicon Dioxide (SiO2)

Tourmaline (Schorl or Dravite) on Matrix (Complex Borosilicate - Na(Mg,Fe,Li,Al,Mn)3Al6(BO3)3Si6O18(OH,F)4) — mineral

Tourmaline (Schorl or Dravite) on Matrix

Complex Borosilicate - Na(Mg,Fe,Li,Al,Mn)3Al6(BO3)3Si6O18(OH,F)4

Watermelon Tourmaline (Elbaite - Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3OH) — mineral

Watermelon Tourmaline

Elbaite - Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3OH

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

River Quartz (Quartz (Silicon Dioxide, SiO2)) — mineral

River Quartz

Quartz (Silicon Dioxide, SiO2)