Aura Quartz
Titanium/Titanium-Gold treated Silicon Dioxide (SiO2)
mineral
Category
Mineral Based Human Made Alloy
Browse mineral based human made alloy specimens identified by the Rock Identifier community.
Iron Slag
Ferrous slag (primarily silicates and oxides of calcium, iron, and magnesium)
Anthropogenic (Man-made industrial byproduct)
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Gold and Silver (Metal Components of an Antique Pocket Watch)
Native Gold (Au) and Native Silver (Ag)
mineral
Chert (specifically Zebra Chert/Flint)
Silicon Dioxide (SiO2)
sedimentary
Amethyst (Purple), Sulfur (Yellow), and Blue Apatite
SiO2 (Quartz), S (Native Sulfur), Ca5(PO4)3(F,Cl,OH) (Apatite Group)
mineral
Shungite
Shungite (carbon-rich Precambrian rock)
mineral
Chert (specifically Jasper/Flint pebble)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Coquina
Biogenic Limestone (Calcite, CaCO3)
sedimentary
Terracotta (Man-made ceramic brick fragment)
Baked clay / High-iron ceramic (Silicate-based ceramic)
Anthropogenic material (Man-made sedimentary mimic)
Limonite (Iron Stone/Ocher)
Limonite (FeO(OH)·nH2O)
mineral
Hag Stone
Porous sedimentary rock (typically Flint, Chert, or Sandstone) with naturally occurring holes
sedimentary
Moss Agate
Silicon Dioxide (SiO2) with inclusions
mineral
Ferrous Slag
Iron/Steel Slag (Complex Calcium-Alumino-Silicates)
Anthropgenic (Industrial Byproduct)
Sandstone with Secondary Mineral Encrustation
Arenite with Silica/Calcite deposits (SiO2 or CaCO3)
sedimentary
Amber Inlay Jewelry
Fossilized Resin (C10H16O)
Organic Gemstone (Biogenic)
Chert (variations include Chalcedony and Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Green Aventurine
SiO2 (Silicon Dioxide with inclusions of Fuchsite)
mineral
Moss Agate
Chalcedony (SiO2) with dendritic inclusions of Manganese or Iron oxide
mineral
Breccia
Breccia - Clastic sedimentary rock
sedimentary
Ferro-silicate Slag
Industrial Vitrified Slag (High-silica amorphous glass)
Mineral byproduct (Anthropogenic)
Halite (Rock Salt)
Halite (Sodium Chloride, NaCl)
mineral
Pearl
Calcium Carbonate (CaCO3) + Conchiolin
mineral
Silver (Sterling Silver)
Argentum (Ag) mixed with Copper (Cu); Formula: Ag+Cu
mineral
Man-made Green Quartz (Lab-grown or Treated)
Silicon Dioxide (SiO2) with artificial coloration
mineral
Coquina
Biogenic Limestone (CaCO3)
sedimentary
Pyrite (on Quartz/Host Rock)
Iron Sulfide (FeS₂)
mineral
Granite
Granite (Silicic Intrusive Igneous Rock)
Igneous
Gold Nugget
Native Gold (Au)
mineral
Granite (specifically Pink Granite)
Phaneritic Plutonic Rock (High Potassium Feldspar Granite)
igneous
Chert (specifically Banded Chert)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Vanadinite
Vanadinite (Pb5(VO4)3Cl)
mineral
Gold Nugget
Native Gold (Au)
mineral
Sandstone
Arenite (primarily SiO2 with trace Fe2O3)
sedimentary
Sandstone (Quartz Sandstone)
Arenite (primarily SiO2)
sedimentary
Ceramic or Polished Stone Heart (Anthropogenic Material)
Glazed Ceramic (Silicon Dioxide based coating on Alumina Silicate body) or Polished Limestone/Marble (Calcium Carbonate, CaCO3)
Synthetic/Anthropogenic Mineraloid
Porcelain (Kaolin-based)
Alumina silicate ceramic (composed primarily of Kaolinite: Al2Si2O5(OH)4)
metamorphic (man-made/engineered)
Blue Apatite
Fluoroapatite (Ca5(PO4)3F)
mineral
Aquamarine
Beryl (Be3Al2Si6O18 with iron impurities)
mineral
Milky Quartz with Chlorite/Mica inclusions
Silicon Dioxide (SiO2) with inclusions
mineral
Coquina
Coquina (Bioclastic Limestone)
sedimentary
Sandstone (likely Calcareous or Quartz-rich)
Arenite (SiO2 based typically)
sedimentary