This Appears To Be A Man Made Metallic Object, Likely Jewelry, Not A Natural Rock, Mineral, Or Geological Specimen.

Browse this appears to be a man made metallic object, likely jewelry, not a natural rock, mineral, or geological specimen. specimens identified by the Rock Identifier community.

Diamond

Diamond (carbon allotrope), C (chemical formula)

Mineral

Milky Quartz

Crystalline Silicon Dioxide (SiO2)

mineral

Petrified Wood

Silicified Wood (primarily SiO2 - Silicon Dioxide)

sedimentary

Clear Quartz

Crystalline Silicon Dioxide (SiO2)

mineral

Garnet in Host Rock

Garnet Group (A3B2(SiO4)3)

metamorphic

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

mineral

Schist

Mica Schist (formula variable based on mineral content, typically containing [K,Al,Fe,Mg,Si,O,H])

metamorphic

Malachite

Malachite (Cu2CO3(OH)2)

mineral

Clear Quartz (Rock Crystal)

Quartz (Silicon Dioxide, SiO2)

mineral

Amethyst

Silicon Dioxide (SiO2) with iron impurities

mineral

Jasper

Silicon Dioxide (SiO2) - a variety of Chalcedony (Cryptocrystalline Quartz)

Mineral

Dyed Agate

Silicon Dioxide (SiO2) with artificial pigment

mineral

Fluorite (Rainbow Fluorite)

Calcium Fluoride (CaF2)

mineral

Quartz Druze

Silicon Dioxide (SiO2)

mineral

Mahogany Obsidian

Obsidian (Volcanic Glass) with Hematite or Magnetite inclusions, SiO2 (Silicon Dioxide)

igneous

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

mineral

Green Tourmaline (Verdelite)

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

mineral

Drill Core Sample

Cylindrical Rock Core (Specific mineralogy varies by extraction site)

Metamorphic (Likely Gneiss or Schist based on texture)

Chert or Flint (polished/water-worn)

Chert (a microcrystalline or cryptocrystalline variety of quartz, SiO2). Flint is a specific variety of chert.

Sedimentary (most likely, as Chert is a sedimentary rock often found as nodules in limestone or as bedded deposits; however, it can also form by metasomatic replacement, which leans towards metamorphic processes under certain conditions)

Fossilized Horn Coral

Order Rugosa (Rugose Coral)

sedimentary

Quartz

Silicon Dioxide (SiO2)

mineral

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

mineral

Blue Sapphire (Ceylon)

Corundum (Al2O3) with traces of Iron and Titanium

mineral

Fluorite (Purple Fluorite in Matrix)

Fluorite (Calcium Fluoride, CaF2)

mineral

Milky Quartz

Silicon Dioxide (SiO2)

mineral

Garnet-Mica Schist

Schist (variety with Almandine Garnet, Fe3Al2(SiO4)3)

metamorphic

Geode Nodules / Chalcedony Geode

Silicon Dioxide (SiO2) - Amorphous to Cryptocrystalline Quartz

sedimentary

Flower Agate (Plume Agate)

Chalcedony (Silicon Dioxide) with Spherulitic Inclusions - SiO2

mineral

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

mineral

Bumble Bee Jasper

Volcanic Tuff (mixture of SiO2, CaCo3, S, and As2S3)

igneous

Carnelian Agate

Silicon Dioxide (SiO2) with iron oxide impurities

mineral

Orbicular Granite

Orbicular Granidiorite / Plutonic Igneous Rock

igneous

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

mineral

Milky Quartz

Silicon Dioxide (SiO2)

mineral

Clear Quartz Sphere

Quartz (Silicon Dioxide, SiO2)

mineral

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

mineral

Dalmatian Jasper

Aplite with Arfvedsonite inclusions

igneous

Turquoise

Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)

mineral

Apatite

Fluorapatite (Ca5(PO4)3F)

mineral

Pyrite

Pyrite (Iron sulfide, FeS₂)

mineral

Quartz (specifically Clear Quartz or Rock Crystal)

Silicon Dioxide (SiO2)

mineral

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

Mineral