Pink Opal (Common Opal)
Amorphous Hydrated Silica (SiO2·nH2O)
mineral
Category
Organic (If Resin) Or Synthetic (If Glass); Simulating Sedimentary Or Metamorphic (For Natural Stones)
Browse organic (if resin) or synthetic (if glass); simulating sedimentary or metamorphic (for natural stones) specimens identified by the Rock Identifier community.
Black Jasper
Black Jasper (Silicate mineral - SiO2)
sedimentary
Pyrite (on the right) and Magnetite or Hematite (on the left)
Iron Sulfide (FeS2) and Iron Oxide (Fe3O4 or Fe2O3)
mineral
Zebra Rock / Zebra Marble
Banded Limestone-Marble Transition
metamorphic
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide)
metamorphic
Jade
Jadeite or Nephrite
Mineral/Mineraloid
Pink Dyed Agate
Silicon Dioxide (SiO2) - Variety Agate
mineral
Dyed Agate
Silicon Dioxide (SiO2)
mineral
Dalmation Stone (Dyed)
Peralkaline rhyolite
igneous
Terrazzo (with Marble and Granite fragments)
Cementitious or resinous composite containing Calcium Carbonate (CaCO3) and Silicates
sedimentary (man-made composite)
Blue Goldstone
Aventurine Glass (Silicon Dioxide with metal inclusions)
man-made glass mineral simulant
Limonite Concretion (Ironstone)
Limonite (FeO(OH)·nH2O) / Goethite
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Blue Slag Glass
Amorphous Silica (Byproduct of smelting)
Antropogenic (Man-made)
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Apatite
Apatite Group (e.g., Fluorapatite Ca5(PO4)3F, Chlorapatite Ca5(PO4)3Cl, Hydroxylapatite Ca5(PO4)3(OH))
mineral
Amethyst (Chevron Amethyst)
Silicon Dioxide (SiO2) with iron impurities
mineral
Red Jasper (Brecciated Jasper)
SiO2 (Silicon Dioxide) with Ferric Iron inclusions
sedimentary
Granite
Phaneritic Felsic Igneous Rock
igneous
Blue Quartzite (Aventurine variety)
Silicon Dioxide (SiO2) with inclusions of Dumortierite or Magnesio-riebeckite
metamorphic
Moonstone (Feldspar variety)
Orthoclase Feldspar (KAlSi3O8)
mineral
Yellow Quartz (Citrine or Iron-Stained Quartz)
Silicon Dioxide (SiO2)
mineral
Red Jasper
Silicon Dioxide (SiO2) with Iron inclusions
sedimentary
Moonstone
Orthoclase Feldspar (formula: (K,Na)AlSi3O8)
mineral
Hag Stone
Siltstone or Fine-grained Sandstone with boring (e.g., Lithophaga impact)
sedimentary
Citrine
Silicon Dioxide (SiO2)
mineral
Strawberry Quartz (or Hematoid Quartz)
Silicon Dioxide (SiO2) with inclusions of Hematite or Goethite
mineral
Rough Sapphire
Corundum (Al2O3)
mineral
Yellow Quartz (Citrine-colored Quartz)
Silicon Dioxide (SiO2)
mineral
Howlite (White Buffalo Turquoise)
Howlite (Calcium Borosilicate Hydroxide), Ca2B5SiO9(OH)5
mineral
Blue Sapphire
Corundum (Al2O3)
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Moqui Marble
Ironstone Concretion (Goethite/Hematite shell with Sandstone core)
sedimentary
Yellow Quartz / Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Smoky Quartz with Calcite/Quartz Veining
Silicon Dioxide (SiO2)
mineral
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Blue Crackle Quartz (Dyed Fire Agate/Quartz)
Silicon Dioxide (SiO2) with artificial dye treatment
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Ruby
Corundum (Aluminum Oxide with Chromium traces), Al2O3:Cr
mineral
Petrified Wood
Silicified Wood (SiO2)
metamorphic
Halite (Himalayan Pink Salt)
Halite - NaCl (Sodium Chloride)
Mineral (Evaporite)
Jasper
Jasper (Silica-rich microcrystalline Quartz, SiO2 with Fe2O3 impurities)
sedimentary