Carnelian (Red Chalcedony)
SiO2 (Silicon Dioxide) with Iron Oxide impurities
Category
Browse mineral (treated) specimens identified by the Rock Identifier community.
Carnelian (Red Chalcedony)
SiO2 (Silicon Dioxide) with Iron Oxide impurities
Citrine (Heat-treated Amethyst)
Silicon Dioxide (SiO2) with iron impurities
Blue Topaz
Topaz [Al2SiO4(F,OH)2]
Pink Satin Spar (Satin Spar Selenite Dyed)
Gypsum (CaSO4·2H2O)
Orange Quartz (Citrine Quartz)
Silicon Dioxide (SiO2) with iron impurities
Calcite
Calcite (Calcium Carbonate, CaCO3)
Citrine
Silicon Dioxide (SiO2) with iron impurities
Yellow Quartz (Citrine or Yellow Jasper)
Silicon Dioxide (SiO2) with iron impurities
Citrine Geode
Silicon Dioxide (Quartz variety, often heat-treated amethyst): SiO2
Chalcopyrite (Peacock Ore)
Copper Iron Sulfide (CuFeS2)
Citrine Quartz / Iron-stained Quartz
Silicon Dioxide (SiO2)
White Topaz
Al2SiO4(F,OH)2 (Aluminium Silicate Fluoride Hydroxide)
Yellow Quartz or Citrine Geode/Cluster
Silicon Dioxide (SiO2)
Tumbled Clear Quartz and Citrine Points
Silicon Dioxide (SiO2)
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions)
Quartz (specifically Citrine or Iron-stained Quartz)
Silicon Dioxide (SiO2)
Citrine
Silicon Dioxide (SiO2) - Macrocrystalline Quartz variety
Dyed Alum or Dyed Quartz (Ornamental Crystal)
Silicon Dioxide (SiO2) or Potassium Alum [KAl(SO4)2·12H2O]
Peacock Ore
Bornite (Cu5FeS4) or iridescent Chalcopyrite (CuFeS2)
Bornite
Bornite (Cu5FeS4)
Quartz (Citrine or Smoky variant)
Silicon Dioxide (SiO2)
Citrine
SiO2 (Silicon Dioxide)
Citrine
Silicon Dioxide (SiO2)
Citrine (likely Heat-Treated Amethyst)
Silicon Dioxide (SiO2)
Peacock ore (bornite/chalcopyrite specimen)
Bornite, Cu₅FeS₄, commonly with chalcopyrite (CuFeS₂)
Dyed blue quartz or druzy geode (likely)
Quartz, silicon dioxide (SiO₂), probably artificially colored
Citrine
Silicon Dioxide (Quartz variety), SiO2
Citrine Quartz
Citrine (Silicon Dioxide, SiO2)
Citrine Quartz
Silicon Dioxide (SiO2) with iron impurities
Amethyst Geode
Amethyst (SiO2) - Silicon Dioxide with Trace Iron Impurities
Carnelian (Agate)
SiO2 (Silicon Dioxide with Iron Oxide impurities)
Costume Jewelry Gemstones (Emerald-imitation and semi-precious beads)
BeCuAl6Si6O18 (Beryl structure), frequently simulated by glass or synthetic spinel
Yellow Quartz (Citrine Quartzite)
Silicon Dioxide (SiO2)
Carnelian Agate
Carnelian (Silicon Dioxide: SiO2) with iron oxide impurities
Yellow Quartz (Citrine/Gold Quartz)
Silicon Dioxide (SiO2)
Dyed Quartz Geode
Silicon Dioxide (SiO2) with artificial pigment
Citrine
Silicon Dioxide (SiO2)
Black Onyx
Silicon Dioxide (SiO2) with parallel banding
Black Onyx
Chalcedony (Silicon Dioxide, SiO2)
Aura Quartz (Titanium/Gold coated)
Silicon Dioxide (SiO2) with metallic vapor deposition
Black Onyx
Chalcedony (SiO2 with inclusions)
Citrine
Silicon Dioxide (SiO₂)