Fossilized Shark Tooth
Chondrichthyes (Class)
fossil
Category
Mineral Health
Browse mineral health specimens identified by the Rock Identifier community.
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Gneiss (foliated metamorphic rock)
Gneiss
metamorphic
Quartz with Sulfide Inclusions
Silicon Dioxide (SiO2) with metallic mineral inclusions
mineral
Lapis Lazuli
(Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2 (Complex silicate rock)
metamorphic
Unidentified pale stone or mineral specimen
Indeterminate; possibly massive quartz, calcite, or a light-colored feldspathic rock
mineral
Limonite (Iron Ore / Ochre)
Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)
mineral
Weathered granite or granitic gneiss
Granite; chiefly quartz, feldspar, and mica, possibly with gneissic foliation
igneous
Limonite Concretion
Limonite (FeO(OH)·nH2O) Pseudomorph
sedimentary
Amygdaloidal Basalt with Agate/Zeolite Amygdules
Basalt (extrusive igneous rock) containing secondary mineral fillings
igneous
Yellow Apatite
Fluorapatite (Ca5(PO4)3(F,Cl,OH))
mineral
Pyrite
Iron Pyrite (FeS2)
mineral
Eudialyte
Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
mineral
Granite
Intrusive Igneous Rock
igneous
Sandstone with Ironstone Concretion
Arenite with Ferruginous Cement
sedimentary
Limonite
FeO(OH)·nH2O
mineral
Rock Specimen
Unclassified rock specimen
sedimentary
Quartz-rich pegmatite (likely feldspar–quartz rock)
Granitic pegmatite; predominantly quartz (SiO₂) and feldspar, with possible mica and iron-oxide staining
igneous
Limonite Ironstone
Goethite-Limonite concretion / Iron oxide
sedimentary
Sandstone (likely Arkosic or Lithic)
Clastic Sedimentary Rock (SiO2 with accessory minerals)
sedimentary
Banded Gneiss
Gneiss (typically quartz, feldspar, mica, amphibole composition)
metamorphic
Schist
Schist (various mineral compositions)
Metamorphic
Copper Ore (Malachite, Azurite, and Chalcopyrite in Host Rock)
Copper-bearing polymetallic mineral aggregate (Cu-minerals)
mineral
Granite
Intrusive Phaneritic Felsic Igneous Rock
igneous
Limonite
FeO(OH)·nH2O
mineral
Granite
Phaneritic Felsic Igneous Rock
igneous
Banded sandstone pebble
Quartz-rich lithic sandstone; exact provenance and composition require testing
sedimentary
Pink Granite (Unakite-bearing or Epidote-bearing Granite)
Plutonic Igneous Rock (Granite)
igneous
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Gneiss
Gneiss
metamorphic
Granite
Phaneritic intrusive igneous rock (Quartz, Feldspar, Mica)
igneous
Gneiss
Gneiss
metamorphic
Diorite (Salt and Pepper Rock)
Diorite
igneous
Gneiss
Gneiss
metamorphic
Concrete with Aggregate
Artificial Conglomerate (Cement and Aggregate)
sedimentary
Gneiss (Banded Gneiss)
Gneiss
metamorphic
Pyrite
Iron Disulfide (FeS2)
mineral
Fluorite on Host Rock
Calcium Fluoride (CaF2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Peacock Ore
Bornite (Cu5FeS4) or iridescent Chalcopyrite (CuFeS2)
mineral
Red Sandstone (Iron-stained)
Clastic sedimentary rock (primarily Quartz with Iron Oxides)
sedimentary
Turquoise
Hydrated phosphate of copper and aluminium - CuAl6(PO4)4(OH)8·4H2O
mineral
Milky Quartz with Country Rock contact
Silicon Dioxide (SiO2) in contact with Metamorphic/Igneous rock
mineral