Pink Quartz
Silicon Dioxide (SiO2)
mineral
Category
Gemstone
Browse gemstone specimens identified by the Rock Identifier community.
Pink Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Fuchsite
K(Al,Cr)2(AlSi3O10)(OH)2
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Citrine
SiO2 (Silicon Dioxide)
mineral
Quartz
Silicon dioxide (SiO2)
Mineral
Variscite in Matrix
Variscite (AlPO4 · 2H2O)
mineral
Green Quartz (Prasiolite/Adventurine)
Silicon Dioxide with inclusions (SiO2)
mineral
Tektite (Indochinite)
Tektite (High-silica natural glass)
igneous
Citrine
Silicon Dioxide (SiO2)
mineral
Precious Red Coral
Corallium rubrum / Corallium japonicum
mineral (organic gemstone)
Citrine
Silicon Dioxide (SiO2)
mineral
Amethyst
Quartz (Silicon Dioxide, SiO2)
gemstone
Yellow faceted gemstone, likely synthetic cubic zirconia or glass; species cannot be confirmed from the image
Undetermined; possible cubic zirconia (ZrO₂), a manufactured gemstone simulant
gemstone
Faceted Gemstones (Mixed)
Various (e.g., Corundum, Beryl, Quartz, or synthetic equivalents)
gemstone
Mixed gemstone specimens
Likely pink sapphire or tourmaline, red garnet, blue sapphire, precious opal, and green tourmaline/emerald; exact identities cannot be confirmed from the collage
gemstone
Faceted clear gemstone in a gold-tone ring, likely colorless glass or cubic zirconia
Undetermined; possible cubic zirconia (ZrO₂) or glass (amorphous SiO₂)
gemstone
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Garnet
Garnet Group (e.g., Almandine, Pyrope)
mineral
Beryl
Beryllium Aluminum Silicate, Be3Al2(SiO3)6
mineral
Diamond-set earring
Diamond (carbon, C); crystal structure: cubic
gemstone
Weathered gray pebble
Likely fine-grained basalt or andesite; exact identification requires testing
igneous
Ruby
Corundum (Al2O3)
gemstone
Jasper / Quartz Pebble
Silicon Dioxide (SiO2) microcrystalline quartz
sedimentary
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Lake Superior Agate
Chalcedony (SiO2)
sedimentary
Amazonite
Microcline-type Feldspar (KAlSi3O8)
mineral
Rhodonite
Manganese Inosilicate (Mn,Fe,Mg,Ca)SiO3
mineral
Red Jasper
Silicon Dioxide (SiO2)
sedimentary
Peridot in Matrix
Olivine ((Mg,Fe)2SiO4)
mineral
Sunstone
Plagioclase Feldspar (Na,Ca)(Al,Si)4O8
mineral
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Citrine
Silicon dioxide (Quartz variety), SiO2
mineral
Olivine (Peridotite)
Magnesium iron silicate (Mg, Fe)2SiO4
igneous
Jadeite and Assorted Corundum (Ruby/Sapphire) / Beryl (Emerald)
Jadeite (NaAlSi2O6), Ruby/Sapphire (Al2O3), Emerald (Be3Al2(SiO3)6)
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Peridot
Olivine (Mg, Fe)2SiO4
gemstone
Amethyst (Druzy Quartz)
Amethyst (Silicon Dioxide - SiO2 with iron impurities)
mineral
Turquoise (Dyed Howlite or Magnesite imitation)
Hydrated phosphate of copper and aluminum / CuAl6(PO4)4(OH)8·4H2O
mineral
Jasper
Silicon Dioxide (SiO2)
sedimentary/mineral
Rhodochrosite (Beads) and Citrine (Pendant)
Rhodochrosite (MnCO3) and Quartz variety Citrine (SiO2)
mineral