Metallic Ornament / Jewelry
N/A - This is an artificial object, not a geological specimen.
This appears to be a man-made metallic object, likely jewelry, not a natural rock, mineral, or geological specimen.
Category
Mineral (Treated)
Browse mineral (treated) specimens identified by the Rock Identifier community.
Olivine (Peridot when gem-quality)
Olivine Group (Magnesium Iron Silicate, (Mg,Fe)2SiO4)
mineral
Amazonite
Potassium Feldspar (KAlSi3O8)
Mineral
Amazonite
Microcline (KAlSi3O8) with Pb impurities
mineral
Citrine
Silicon dioxide (SiO2)
mineral
Amethyst
Quartz (Silicon Dioxide with Iron impurities), SiO2
mineral
Amazonite
KAlSi3O8 (Potassium aluminum silicate - blue-green variety of Microcline)
mineral
Fire Opal (in Matrix)
Hydrated Silica (SiO2·nH2O)
mineral
Sunstone
Plagioclase Feldspar (Na,Ca)(Al,Si)4O8
mineral
Amazonite
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Chalcedony (Agate Pebble)
Silicon Dioxide (SiO2)
mineral
Granite
Granite (Phaneritic Acidic Igneous Rock)
igneous
Amygdaloidal Basalt
Amygdaloidal Basalt containing Zeolite or Quartz (SiO2/Silicates)
igneous
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz in Host Rock
Silicon Dioxide (SiO2) in Rhyolite or Granite matrix
igneous
Lazulite
Lazulite (Mg,Fe2+)Al2(PO4)2(OH)2
mineral
Fossil Coral
Fossilized Scleractinia or Tabulata (various genera/species)
Sedimentary
Sandstone (Ferruginous)
Arenite (composed primarily of SiO2 with Fe2O3 cement)
sedimentary
Red Sandstone
Clastic sedimentary rock (primarily SiO2 with Fe2O3)
sedimentary
Malachite
Copper carbonate hydroxide Cu2CO3(OH)2
mineral
Sandstone (Ferruginous)
Arenite (Fe-rich)
sedimentary
Black Marble
Recrystallized Calcite (CaCO3)
metamorphic
Turquoise (Blue Howlite / Magnesite imitation)
CuAl6(PO4)4(OH)8·4H2O (for natural Turquoise); Ca2B5SiO9(OH)5 (for Howlite)
mineral
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily SiO2 with Fe2O3 oxides)
sedimentary
Red Sandstone
Arenite (with Iron Oxide)
sedimentary
Sandstone (Red Sandstone)
Clastic Sedimentary Rock (primarily SiO2 with Iron Oxide)
sedimentary
N/A - Image is non-geological
Acrylonitrile Butadiene Styrene (ABS) or Polypropylene (PP)
Synthetic material (Plastic/Polymer)
Quartzite and Jasper Pebbles
Quartzite (re-crystallized Quartz) and Cryptocrystalline Quartz (SiO2)
metamorphic
Rough Quartz (Milky Quartz Pebbles)
Silicon Dioxide (SiO2)
mineral
Fossilized Dinosaur Skull (Tyrannosaurus rex)
Tyrannosaurus rex (permineralized fossil), rich in Hydroxylapatite/Silica
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Dinosaur Fossil (Tyrannosaurus rex skull replica/specimen)
Tyrannosaurus rex (fossilized in permineralized sedimentary matrix)
sedimentary
Fossilized Shark Tooth (Otodus obliquus)
Otodus obliquus (Mineral composition: Bio-apatite/Calcium Phosphate replaced by various minerals)
sedimentary (fossil)
Schist
Mica Schist
metamorphic
Fluorite
Calcium Fluoride (CaF2)
mineral
Gypsum (Wallboard/Drywall)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
sedimentary
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic silicate with secondary mineral inclusions)
Igneous
Quartz (specifically Milky Quartz/Quartzite)
Silicon Dioxide (SiO2)
Mineral
Copper Ore (with Malachite and Azurite)
Hydroxide copper carbonate (Cu2CO3(OH)2 / Cu3(CO3)2(OH)2)
mineral
Blue Apatite
Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)
mineral
Sapphirine in Matrix
Sapphirine (Mg,Al)8(Al,Si)6O20
mineral