Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Category
Gemstone
Browse gemstone specimens identified by the Rock Identifier community.
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Polished Agate (Yellow/Grey Agate Pendant)
Silicon Dioxide (SiO2)
mineral
Peridot (Olivine)
Olivine ((Mg, Fe)2SiO4)
mineral
Beaded Jewelry (Assorted Gemstones)
Various minerals, including but not limited to Quartz (SiO2), Garnet (X3Y2(SiO4)3), Jade (Na(Al,Fe)Si2O6), Amethyst (SiO2),等の多様な組み合わせ
Mineral, Jewelry
Citrine
Silicon dioxide (SiO2) - yellow quartz variety
mineral
Fairburn Agate / Agate-bearing Breccia
Cryptocrystalline Quartz (SiO2) within Jasper/Breccia matrix
sedimentary
Precious Red Coral
Corallium rubrum (Calcium Carbonate, CaCO3)
mineral
Ocean Jasper
Orbicular Jasper / SiO2
gemstone
Mystic Topaz (Treated Quartz or Topaz)
Silicate Mineral (SiO2 or Al2SiO4(F,OH)2) with Titanium coating
gemstone
Mixed Gemstone and Mineral Collection
Silicon Dioxide (SiO2) based minerals and others
mineral
Chrysoprase
Chalcedony with nickel impurities (SiO2)
gemstone
Pearl
Calcium Carbonate (primarily Aragonite and Calcite), CaCO3
mineral
Peridot (Olivine)
Magnesium Iron Silicate (Mg, Fe)2SiO4
mineral
Turquoise
CuAl6(PO4)4(OH)8·4H2O
mineral
Dyed Agate / Quartz (Tumbled)
Silicon Dioxide (SiO2) with artificial dye
mineral
Pearl
Calcium Carbonate (primarily Aragonite and Calcite), CaCO3
mineral
Carnelian
Carnelian (subset of Chalcedony); SiO2 with Iron Oxide impurities
mineral
Pearl
Calcium carbonate (CaCO3) + organic conchiolin
gemstone
Fire Opal
Hydrated Silica (SiO2·nH2O)
mineral
Peridot
Olivine (Mg, Fe)2SiO4
Mineral
Aquamarine
Beryl (Be3Al2Si6O18)
mineral
Pearl
Calcium Carbonate (Aragonite) - CaCO3
mineral
Peridot (Olivine)
Olivine ((Mg, Fe)2SiO4)
mineral
Almandine Garnet in Matrix
Almandine, Fe3Al2(SiO4)3
metamorphic
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Green Quartz (Prasiolite)
Silicon Dioxide (SiO2)
mineral
Garnet
Pyrope or Almandine (X3Y2(SiO4)3)
mineral
Diamond
Native Carbon (C)
gemstone
Quartz (Druzy / Goldstone Gemstone Cabochon)
Silicon Dioxide (SiO2)
gemstone
Quartz
SiO2 (Silicon Dioxide)
mineral
Rough Amber (likely Copal or immature Amber)
Organic gemstone / Succinite (if Baltic)
mineral
Amber
Succinicum (Organic Gemstone - Resinite)
mineraloid
Precious Opal
Hydrated silica (SiO2·nH2O)
mineraloid
Black Pearl (Tahitian or Irradiated Type)
Organic gemstone (Calcium Carbonate with Conchiolin Binding)
mineraloid
Prehnite
Ca2Al(AlSi3O10)(OH)2 (Calcium Aluminum Silicate)
mineral
Quartz Pebble (Citrine or Iron-Stained)
Silicon Dioxide (SiO2)
mineral
Larimar
Pectolite, NaCa2Si3O8(OH)
gemstone
Jadeite and Assorted Corundum (Ruby/Sapphire) / Beryl (Emerald)
Jadeite (NaAlSi2O6), Ruby/Sapphire (Al2O3), Emerald (Be3Al2(SiO3)6)
mineral
Rhinestone (or glass crystal)
Silicon dioxide (if glass) / Various
Mineral/gemstone imitation
Amethyst
Silicon Dioxide (SiO2 with iron impurities)
gemstone
Emerald in Matrix
Beryl (Be3Al2Si6O18 with Chromium/Vanadium traces)
gemstone