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.

Sapphire (Blue)

Corundum (Al2O3)

mineral

Labradorite in Matrix

(Ca, Na)(Al, Si)4O8 (Plagioclase Feldspar)

mineral

Olivine in Basalt (Peridot)

Magnesium Iron Silicate (Mg,Fe)2SiO4 (Mineral) within Basalt (Rock)

igneous

Quartz Geode

Silicon Dioxide (SiO2)

mineral

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

mineral

Pyrite (or Fool's Gold)

Pyrite (FeS₂)

Mineral

Ferruginous Breccia

Breccia with Iron-rich (Hematite/Goethite) Matrix

sedimentary

Blue Tiger's Eye

Crocidolite in Quartz (altered)

Mineral

Quartz

Silicon Dioxide (SiO2)

mineral

Quartz in Host Rock

Silicon Dioxide (SiO2) in Rhyolite or Granite matrix

igneous

Prehnite

Ca2Al(AlSi3O10)(OH)2 (Calcium Aluminum Silicate hydroxide)

mineral

Clear Quartz

Silicon Dioxide (SiO2) / Rock Crystal

mineral

Green Onyx (Banded Calcite)

Calcite (Calcium Carbonate, CaCO3)

mineral

Clear Quartz Cluster

Silicon Dioxide (SiO2)

mineral

Rough Emerald in Matrix

Beryl (Be3Al2Si6O18) with trace Chromium/Vanadium

mineral

Schist

N/A (a rock type, not a mineral formula)

metamorphic

Smoky Quartz

SiO2 (Silicon Dioxide)

Mineral

Dendritic Agate

Silicon Dioxide with Manganese/Iron oxide inclusions (SiO2)

Mineral

Black Onyx

Silicon dioxide (SiO2) with parallel banded structure

Mineral (variety of chalcedony)

Blue Chalcedony

Cryptocrystalline Quartz (SiO2)

mineral

Garnet (likely Almandine or a blend)

Garnet group: X3Y2(SiO4)3, where X can be Ca, Mg, Fe2+, Mn2+ and Y can be Al, Fe3+, Cr3+. Given the dark, somewhat reddish-brown appearance in the image, it's likely Almandine (Fe3Al2(SiO4)3) or a mix with other iron-rich garnets.

Mineral