Quartzite
Silica (SiO2) quartzite
metamorphic
Category
Man Made Material (Jewelry, Metal Alloy)
Browse man made material (jewelry, metal alloy) specimens identified by the Rock Identifier community.
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Granite
Granite (Felsic Plutonic Rock)
igneous
Chert (specifically White Chert or Novaculite)
Silicon Dioxide (SiO₂)
sedimentary
Gold
Native Gold (Au)
mineral
Chert / Flint
Chert (Cryptocrystalline Quartz, SiO2)
sedimentary
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Bauxite
Bauxite (mixture of Gibbiste Al(OH)3, Boehmite ̳-AlO(OH), and Diaspore ́-AlO(OH))
sedimentary
Banded Sandstone
Arenite with Liesegang banding
sedimentary
Stony-Iron Meteorite (likely Mesosiderite or Ordinary Chondrite)
Meteorite (Silicate-Metal Matrix)
meteorite
Fossilized echinoid (sea urchin), likely a flint/chalk-associated test
Echinoid fossil; likely a regular echinoid such as Echinocidaris or related taxon, composed mainly of recrystallized calcite (CaCO₃)
fossil
Gold Ore
Gold-bearing Quartz (Native Gold, Au)
mineral
Lapis Lazuli
Lazurite-rich metamorphic rock (approx. (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)
metamorphic
Moss Agate
Silicon Dioxide (SiO2) with inclusions of Manganese or Iron oxide
mineral
Chert (Flint variety)
Chert (Microcrystalline or Cryptocrystalline Quartz), SiO2
sedimentary
Quartz with Chlorite / Greenschist
Quartz vein in Greenschist (SiO2 with Chlorite group minerals)
metamorphic
Coquina / Fossiliferous Limestone
Calcareous bioclastic sedimentary rock (CaCO3)
sedimentary
Diorite
Intermediate plutonic igneous rock
igneous
Faceted Peach Morganite (Beryl)
Morganite (Be3Al2Si6O18 with trace Manganese)
mineral
Quartz Vein
Silicon Dioxide (SiO2)
Mineral
Diorite
Diorite
igneous
Carved quartz (likely rose quartz and green aventurine/quartz)
Quartz, silicon dioxide (SiO₂); green material may be aventurine quartz or serpentine
gemstone
Small metallic meteorite-like specimen
Unclassified iron-rich meteorite candidate; possibly an ordinary chondrite or terrestrial slag
meteorite
Gold Nugget
Native Gold (Au)
mineral
Gold Nugget
Native Gold (Au)
mineral
Gold Nugget
Native Gold (Au)
mineral
Gold Nugget
Gold (Au)
mineral
Chert / Flint
Silicon Dioxide (SiO2)
sedimentary
Rough Emerald Crystals
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Native Copper
Native Copper (Cu)
mineral
Iron Meteorite
Siderite (meteoritic iron, Fe-Ni alloy)
mineral
Cullet Glass (Industrial Slag Glass)
Amorphous Silica (SiO2) with metallic oxide impurities
Man-made byproduct (often mistaken for Obsidian or Emerald)
Diamond (Pear Cut)
Carbon (C)
gemstone
Corundum (Ruby variety)
Aluminium oxide (Al2O3)
mineral
Likely metallic mineral specimen
Probably galena (lead sulfide, PbS), though visual identification is uncertain
mineral
Ironstone Matrix with Jasper / Chert
Ferruginous Chert / Limonitic Jasper (SiO2 with Fe-oxides)
sedimentary
Aura Quartz (Coated Quartz)
Silicon Dioxide (SiO2) treated with metallic vapor
mineral
Hypersthene
Hypersthene (Magnesium Iron Silicate - (Mg,Fe)SiO3)
mineral
Jasper
Silicon dioxide (SiO2)
mineral
Beryl (Variety: Aquamarine)
Beryllium Aluminum Cyclosilicate (Be3Al2Si6O18)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Beryl (var. Heliodor or Aquamarine)
Beryllium Aluminum Cyclosilicate (Be3Al2Si6O18)
mineral
Beryl (Emerald Variety)
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral