Carnelian
Carnelian (Microcrystalline Quartz, SiO2 with Fe2O3 impurities)
mineral
Category
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.
Aquamarine and clear quartz
Aquamarine (Be3Al2Si6O18), Quartz (SiO2)
Mineral
Amethyst
SiO2 (Silicon Dioxide)
mineral
Quartz (Smoky/Milky variety with matrix)
Silicon Dioxide (SiO2)
mineral
Malachite
Malachite (Cu2(CO3)(OH)2 - a copper carbonate hydroxide mineral)
Mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Rough Emerald/Green Beryl
Beryl (Be3Al2(SiO3)6) with trace amounts of Chromium or Vanadium
mineral
Jade (Nephrite or Jadeite)
Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (Na(Al,Fe3+)Si2O6)
Metamorphic Rock / Mineral
Druzy Quartz
Crystalline Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Amethyst (vibrant lilac/purple variety)
Silicon Dioxide (SiO2) with iron impurities
mineral
Smoky Quartz with Feldspar
Quartz (SiO2) with Potassium Feldspar (KAlSi3O8)
mineral
Moonstone
Adularia (orthoclase) or Albite (plagioclase), a potassium aluminum silicate of the feldspar group
Mineral
Blue Sapphire
Corundum (Al2O3)
mineral
Banded Iron Formation
Banded Iron Formation (BIF)
sedimentary
Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Chert (Holey Stone)
Microcrystalline Quartz (SiO2)
sedimentary
Moqui Marble
Hematite concretion (Iron oxide), Fe2O3
sedimentary
Quartz (Clear/Smoky Geode fragment)
Silicon Dioxide (SiO2)
mineral
Herkimer Diamond
Quartz (Silicon Dioxide, SiO2)
mineral
Eye Agate
Silicon Dioxide (SiO2) - Banded Chalcedony
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Gold-Bearing Quartz
Silicon Dioxide with Native Gold (SiO2 + Au)
mineral
Onyx Marble (also commonly called Onyx)
Calcite (CaCO3), often with other mineral impurities
Sedimentary Rock (specifically a type of Travertine)
Jasper with Quartz Druzy
Silicon Dioxide (SiO2)
sedimentary
Basalt
Basalt (Aphanitic Mafic Igneous Rock)
igneous
Lapis Lazuli
Lapis Lazuli (Complex aggregate mainly of Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)
metamorphic
Rough Amethyst
Silicon Dioxide (SiO2) with Iron impurities
mineral
Lapis Lazuli
Lapis Lazuli (Complex silicate rock containing Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Calcite, and Pyrite)
metamorphic
Amethyst
SiO2 (Silicon Dioxide)
Mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Banded Agate
Microcrystalline Quartz (SiO2) with impurities
mineral
Garnet Schist
Almandine Garnet-Mica Schist (X₃Y₂(SiO₄)₃)
metamorphic
Quartz (Milky/Clear Variety)
Silicon Dioxide (SiO2)
mineral
Ammonite Fossil
Ammonoidea (subclass)
sedimentary
Mica Schist
Medium-grade regional metamorphic rock (composition varies)
metamorphic
Aquamarine
Beryl (Be₃Al₂Si₆O₁₈), specifically a blue or cyan variety
Mineral
Chalcedony (Carnelian Agate pebble)
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Quartz (SiO2 - Silicon Dioxide)
Mineral
Turquoise in Matrix
Hydrated phosphate of copper and aluminium: CuAl6(PO4)4(OH)8·4H2O
mineral
Emerald in Host Rock
Beryl (Be3Al2Si6O18) containing Chromium and/or Vanadium
mineral