Rock Identifier

Category

Mineral (Processed Alloy)

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

Orange calcite (honey calcite) (Calcite, calcium carbonate (CaCO₃)) — mineral

Orange calcite (honey calcite)

Calcite, calcium carbonate (CaCO₃)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Dalmatian Jasper (Peralkaline Feldspar Diorite/Rhyolite) — igneous

Dalmatian Jasper

Peralkaline Feldspar Diorite/Rhyolite

Gold-Bearing Quartz Ore (Crystalline Silicon Dioxide (SiO2) with Trace Aurum (Au)) — mineral

Gold-Bearing Quartz Ore

Crystalline Silicon Dioxide (SiO2) with Trace Aurum (Au)

Fossilized Shark Tooth (Chondrichthyes (Class) fossilized tooth) — fossil

Fossilized Shark Tooth

Chondrichthyes (Class) fossilized tooth

Quartz with Muscovite Mica (Silicon Dioxide (SiO2) with Potassium Aluminum Silicate Hydroxide Fluoride (KAl2(AlSi3O10)(F,OH)2)) — mineral

Quartz with Muscovite Mica

Silicon Dioxide (SiO2) with Potassium Aluminum Silicate Hydroxide Fluoride (KAl2(AlSi3O10)(F,OH)2)

Yellow Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz Pebble

Silicon Dioxide (SiO2)

Fossilized Shell Fragment (Bivalvia or Gastropoda (Class) fragment) — fossil

Fossilized Shell Fragment

Bivalvia or Gastropoda (Class) fragment

Schist with Quartz Vein (Mica Schist with Crystalline Quartz (SiO2)) — metamorphic

Schist with Quartz Vein

Mica Schist with Crystalline Quartz (SiO2)

Shark Tooth Fossil (Otodus obliquus (or similar prehistoric lamniform shark tooth)) — fossil

Shark Tooth Fossil

Otodus obliquus (or similar prehistoric lamniform shark tooth)

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

Lepidolite

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

Granite (Phaneritic plutonic rock (High silica)) — igneous

Granite

Phaneritic plutonic rock (High silica)

Shark Tooth Fossil (Chondrichthyes fossil) — fossil

Shark Tooth Fossil

Chondrichthyes fossil

Snowflake Obsidian (Polished Cabochon) (Obsidian with Spherulitic Cristobalite (SiO2)) — igneous

Snowflake Obsidian (Polished Cabochon)

Obsidian with Spherulitic Cristobalite (SiO2)

Tumbled Stone (Silicon dioxide / Various silicates) — mineral

Tumbled Stone

Silicon dioxide / Various silicates

Note on Image Identification: Textile (N/A (Anthropogenic material)) — not a rock

Note on Image Identification: Textile

N/A (Anthropogenic material)

Red Sandstone (Iron-rich) (Ferruginous Sandstone (SiO2 with Iron Oxides)) — sedimentary

Red Sandstone (Iron-rich)

Ferruginous Sandstone (SiO2 with Iron Oxides)

Ferruginous Sandstone (Sandstone (arenite) with Limonite/Goethite cement) — sedimentary

Ferruginous Sandstone

Sandstone (arenite) with Limonite/Goethite cement

Purple Turquoise (Composite Mojave Turquoise) (CuAl6(PO4)4(OH)8·4H2O (Hydrated copper aluminum phosphate composite)) — mineral

Purple Turquoise (Composite Mojave Turquoise)

CuAl6(PO4)4(OH)8·4H2O (Hydrated copper aluminum phosphate composite)

Gossan (Iron Hat) (Hydrous Iron Oxides (predominantly Goethite FeO(OH) and Limonite)) — mineral

Gossan (Iron Hat)

Hydrous Iron Oxides (predominantly Goethite FeO(OH) and Limonite)

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Petrified Wood (Silicified Wood (primarily SiO2)) — mineral

Petrified Wood

Silicified Wood (primarily SiO2)

Tiger's Eye (Pseudomorph of Quartz after Crocidolite (SiO2)) — mineral

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Yellow Calcite (Calcium Carbonate (CaCO3)) — mineral

Yellow Calcite

Calcium Carbonate (CaCO3)

Tiger's Eye (Pseudomorph of Quartz after Crocidolite (SiO2)) — mineral

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Yellow Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Fossil Shark Tooth (Chondrichthyes tooth fossil) — fossil

Fossil Shark Tooth

Chondrichthyes tooth fossil

Hematite (Hematite (Fe2O3)) — mineral

Hematite

Hematite (Fe2O3)

Blue Apatite (Fluorapatite / Apatite Group (Ca5(PO4)3(F,Cl,OH))) — mineral

Blue Apatite

Fluorapatite / Apatite Group (Ca5(PO4)3(F,Cl,OH))

Black Tourmaline (Schorl (Sodium iron aluminum boron silicate hydroxide)) — mineral

Black Tourmaline

Schorl (Sodium iron aluminum boron silicate hydroxide)

Muscovite Mica (KAl2(AlSi3O10)(OH)2) — mineral

Muscovite Mica

KAl2(AlSi3O10)(OH)2

Rhodonite (Manganese Silicate (Mn,Fe,Mg,Ca)SiO3) — mineral

Rhodonite

Manganese Silicate (Mn,Fe,Mg,Ca)SiO3

Pearl (Calcium carbonate (CaCO3) in the form of Aragonite or Calcite) — mineral

Pearl

Calcium carbonate (CaCO3) in the form of Aragonite or Calcite

Carnelian Agate / Iron-Stained Quartz (SiO2) — Mineral

Carnelian Agate / Iron-Stained Quartz

SiO2

Granite (Intrusive Phaneritic Felsic Igneous Rock) — igneous

Granite

Intrusive Phaneritic Felsic Igneous Rock

Petrified Wood (Silicified wood (principally SiO2)) — sedimentary

Petrified Wood

Silicified wood (principally SiO2)

Titanium Aura Quartz (Titanium-coated Silicon Dioxide (SiO2)) — mineral

Titanium Aura Quartz

Titanium-coated Silicon Dioxide (SiO2)

Tumbled Mixed Gemstones and Rocks (Various mineral species including quartz (SiO2) and silicate minerals) — mineral

Tumbled Mixed Gemstones and Rocks

Various mineral species including quartz (SiO2) and silicate minerals

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

Quartz / Citrine Quartz

Silicon Dioxide (SiO2)

Clay Brick (Ceramic structural unit (Al2O3·2SiO2·2H2O as precursor)) — metamorphic (man-made/anthropogenic)

Clay Brick

Ceramic structural unit (Al2O3·2SiO2·2H2O as precursor)

metamorphic (man-made/anthropogenic)