Hematite
Iron(III) oxide (Fe2O3)
mineral
Category
Synthetic (Not A Natural Rock)
Browse synthetic (not a natural rock) specimens identified by the Rock Identifier community.
Dyed Dalmatian Jasper (Dalmatian Stone)
Perthitic Feldspar with Arfvedsonite inclusions
igneous
Ruby
Corundum (Al2O3 with Chromium impurities)
mineral
Gold Nugget
Native Gold (Au)
mineral
Carnelian Agate
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Moonstone
Orthoclase Feldspar (formula: (K,Na)AlSi3O8)
mineral
Fired Clay Brick (Anthropic Rock substitute)
Anthropogenic polycrystalline ceramic (predominantly Mullite and Quartz: Al6Si2O13 + SiO2)
metamorphic (man-made / anthropic)
Apache Tear (Obsidian)
Obsidian (Hydrated Amorphous Silica, SiO2 + MgO/Fe3O4)
igneous
Green Fluorite (Beaded)
Fluorite (Calcium Fluoride, CaF2)
mineral
Bornite (Peacock Ore)
Bornite (Cu5FeS4)
mineral
White Agate (Tumbled)
Silicon Dioxide (SiO2) - Cryptocrystalline Chalcedony
mineral
Rainbow Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Gold Nugget
Native Gold (Au)
mineral
Aquamarine
Beryl (Be3Al2Si6O18), specifically the blue-green variety
Mineral
Blue Agate (Dyed)
Silicon Dioxide (SiO2) - Variety of Chalcedony
mineral
Basalt (Porphyritic)
Basalt (Mafic Extrusive Igneous Rock)
igneous
Herkimer Diamond
Double-terminated Quartz (Silicon Dioxide, SiO2)
mineral
Pyrite (Fools Gold)
Iron Sulfide (FeS2)
mineral
Quartz (River Pebble)
Quartz (Silicon Dioxide - SiO2)
mineral
Carnelian Agate
Silicon Dioxide with Iron Oxide impurities (SiO2)
mineral
Synthetic Costume Glove (Paws)
Polyethylene terephthalate (Polyester) & Polyurethane blend
Non-geological / Man-made textile
Yellow Chalcedony
Chalcedony (a cryptocrystalline variety of Quartz, SiO₂)
Mineral
Blue Sapphire (Ceylon)
Corundum (Al2O3) with traces of Iron and Titanium
mineral
Coquina
Coquina (Bioclastic Limestone)
sedimentary
Scoria (Lava Rock)
Vesicular Basalt / Scoria
igneous
Dyed Quartz (imitating Emerald/Green Quartz)
Silicon Dioxide (SiO2) with artificial pigment
mineral
Emerald
Beryl (Be3Al2Si6O18) with trace amounts of Chromium and/or Vanadium
mineral
Fluorite (Blue)
Calcium Fluoride (CaF2)
mineral
Gold Nugget
Native Gold (Au)
mineral
Amethyst
Silicon Dioxide with trace Iron (SiO2 + Fe3+)
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Quartz (Engineered Quartz Surface)
Silicon Dioxide (SiO2) based composite
mineral (man-made composite)
Carnelian (a variety of Chalcedony)
Silicon Dioxide (SiO₂)
Mineral
Orange Quartzite
Quartzite (primarily SiO2 with Hematite impurities)
metamorphic
Lapis Lazuli (Tumbled Stone)
Na6Ca2(Al6Si6O24)(SO4,S,Cl)2 (predominantly Lazurite)
metamorphic
Green Aura Quartz (Titanium treated Kyanite or Quartz)
Silicon Dioxide (SiO2) or Aluminum Silicate (Al2SiO5) with Titanium/Metal Oxide coating
mineral (man-made aura treatment)
Amethyst
Silicon Dioxide (SiO2 with iron impurities)
mineral
Turquoise (Blue Howlite imitation)
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Carnelian
Carnelian (a variety of Chalcedony, which is a microcrystalline quartz, SiO2)
Mineral (variety of Chalcedony)
Not a rock
Not a rock
Not a rock
Not a rock
Not a rock
Not a rock
Moonstone (Feldspar)
Orthoclase/Albite ((K,Na)AlSi3O8)
mineral