Rock Identifier

Category

Mineral (Processed Alloy)

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

Schist (Garnet-Mica Schist) (Garnet-Mica Schist (X-Y)3Z2(SiO4)3) — metamorphic

Schist (Garnet-Mica Schist)

Garnet-Mica Schist (X-Y)3Z2(SiO4)3

Honey Calcite (Calcium Carbonate (CaCO3)) — mineral

Honey Calcite

Calcium Carbonate (CaCO3)

Sandstone (Quartz-rich) (Arenite (SiO2 based)) — sedimentary

Sandstone (Quartz-rich)

Arenite (SiO2 based)

Aventurine (Silicon Dioxide (SiO2) with inclusions) — mineral

Aventurine

Silicon Dioxide (SiO2) with inclusions

Sandstone (Water-worn Pebble) (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone (Water-worn Pebble)

Clastic sedimentary rock (primarily SiO2)

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

White Marble (Recrystallized Calcite (CaCO3)) — metamorphic

White Marble

Recrystallized Calcite (CaCO3)

Breciated Jasper (Silicon Dioxide (SiO2) with iron oxide inclusions) — sedimentary

Breciated Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Rose Quartz (Silicon Dioxide with trace inclusions (SiO2)) — mineral

Rose Quartz

Silicon Dioxide with trace inclusions (SiO2)

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

Lepidolite

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

Weathered pale-blue rock fragment (Unidentified; the image does not show enough detail for a reliable geological identification) — sedimentary

Weathered pale-blue rock fragment

Unidentified; the image does not show enough detail for a reliable geological identification

Magnetite / Hematite (Iron Ore) (Magnetite (Fe3O4) or Hematite (Fe2O3)) — mineral

Magnetite / Hematite (Iron Ore)

Magnetite (Fe3O4) or Hematite (Fe2O3)

Gray stone fragment (Unidentified fine-grained gray rock; exact identification is not possible from the image) — igneous

Gray stone fragment

Unidentified fine-grained gray rock; exact identification is not possible from the image

Weathered porphyritic volcanic rock (likely basalt/andesite) (Fine-grained mafic to intermediate volcanic rock; probably porphyritic basalt or andesite, composed mainly of plagioclase with pyroxene and iron oxides) — igneous

Weathered porphyritic volcanic rock (likely basalt/andesite)

Fine-grained mafic to intermediate volcanic rock; probably porphyritic basalt or andesite, composed mainly of plagioclase with pyroxene and iron oxides

Granite (Granite (Phaneritic igneous rock)) — igneous

Granite

Granite (Phaneritic igneous rock)

Gossan (Iron Cap) (Limonitic Gossan (FeO(OH)·nH2O)) — sedimentary

Gossan (Iron Cap)

Limonitic Gossan (FeO(OH)·nH2O)

Small brown mineral specimen, possibly mica-bearing rock (Unidentified from the image; exact mineral species cannot be determined at this scale) — mineral

Small brown mineral specimen, possibly mica-bearing rock

Unidentified from the image; exact mineral species cannot be determined at this scale

Unidentified tan-gray stone (Indeterminate from the blurry image; it may be a common silicate rock such as quartzite or granite.) — mineral

Unidentified tan-gray stone

Indeterminate from the blurry image; it may be a common silicate rock such as quartzite or granite.

Rose Quartz (Silicon Dioxide (SiO2)) — mineral

Rose Quartz

Silicon Dioxide (SiO2)

Banded Agate (Cryptocrystalline Quartz (SiO2)) — mineral

Banded Agate

Cryptocrystalline Quartz (SiO2)

Sodalite with Syenite (Yooperlite) (Sodalite in Syenite (Na8(Al6Si6O24)Cl2)) — mineral

Sodalite with Syenite (Yooperlite)

Sodalite in Syenite (Na8(Al6Si6O24)Cl2)

Quartz pebble / River stone (SiO2 (Silicon Dioxide)) — mineral

Quartz pebble / River stone

SiO2 (Silicon Dioxide)

Green Tourmaline (Verdelite) (Elbaite (Na(Li,Al)3Al6(BO3)3Si6O18(OH)4)) — gemstone

Green Tourmaline (Verdelite)

Elbaite (Na(Li,Al)3Al6(BO3)3Si6O18(OH)4)

Likely graywacke or fine-grained metamorphic rock (Quartz–feldspar–mica-rich lithic sandstone (tentative; image alone is insufficient for exact identification)) — sedimentary

Likely graywacke or fine-grained metamorphic rock

Quartz–feldspar–mica-rich lithic sandstone (tentative; image alone is insufficient for exact identification)

Blue Calcite Sphere (Calcium Carbonate (CaCO3)) — mineral

Blue Calcite Sphere

Calcium Carbonate (CaCO3)

Green Calcite (Calcium Carbonate (CaCO3)) — mineral

Green Calcite

Calcium Carbonate (CaCO3)

Banded Agate (Silicon Dioxide (SiO2) - Variety Agate) — mineral

Banded Agate

Silicon Dioxide (SiO2) - Variety Agate

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Dyed Agate Geode Slice (Silicon Dioxide (SiO2) - Banded Chalcedony) — mineral

Dyed Agate Geode Slice

Silicon Dioxide (SiO2) - Banded Chalcedony

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Greasy Quartz (likely carved Milky Quartz or Aventurine) (Silicon Dioxide (SiO2)) — mineral

Greasy Quartz (likely carved Milky Quartz or Aventurine)

Silicon Dioxide (SiO2)

Sandstone Cobble with Iron Staining (Arenite with Limonite/Goethite coatings) — sedimentary

Sandstone Cobble with Iron Staining

Arenite with Limonite/Goethite coatings

Vesicular Basalt (Iron-Stained) (Mafic Volcanic Rock (Basalt)) — igneous

Vesicular Basalt (Iron-Stained)

Mafic Volcanic Rock (Basalt)

Black Tourmaline (Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)) — mineral

Black Tourmaline

Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)

Rose Quartz (Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese) — mineral

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Fossilized Shark Tooth (Chondrichthyes (Class)) — fossil

Fossilized Shark Tooth

Chondrichthyes (Class)

Greenstone (Greenschist (Greened Metabasalt)) — metamorphic

Greenstone

Greenschist (Greened Metabasalt)

Gold Ore (Auriferous Quartz with Chalcopyrite/Pyrite) (Au (Native Gold) in Quartz (SiO2) with FeS2 (Pyrite) or CuFeS2 (Chalcopyrite)) — Mineral

Gold Ore (Auriferous Quartz with Chalcopyrite/Pyrite)

Au (Native Gold) in Quartz (SiO2) with FeS2 (Pyrite) or CuFeS2 (Chalcopyrite)

Fluorite on Matrix (Calcium Fluoride (CaF2)) — mineral

Fluorite on Matrix

Calcium Fluoride (CaF2)

Blue Apatite (Fluorapatite (Ca5(PO4)3F)) — mineral

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Blue Quartz (Aventurine) (Silicon Dioxide (SiO2) with fibrous inclusions (commonly Dumortierite)) — mineral

Blue Quartz (Aventurine)

Silicon Dioxide (SiO2) with fibrous inclusions (commonly Dumortierite)

Gold Ore (Lode Gold) (Native Gold (Au) in Matrix) — mineral

Gold Ore (Lode Gold)

Native Gold (Au) in Matrix