Slag Glass (Cullet)
Amorphous Silicon Dioxide (SiO2) with metal oxide colorants
Anthropogenic (Man-made)
Category
Mineral (Man Made Composite)
Browse mineral (man made composite) specimens identified by the Rock Identifier community.
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Diamond Druzy (Crystalline Diamond)
Carbon (C)
mineral
Diamond
Diamond (pure native carbon, C)
mineral
Diamond (Cut jewelry specimen)
Diamond (pure Carbon, C)
mineral
Turquoise (likely stabilized or simulated Howlite)
CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminium)
mineral
Synthetic Zinc/Polycarbonate Composite (Bey-specimen)
Zinc Alloy (Zamak 3) with Polycarbonate (C15H16O2)n Overlay
Anthropogenic Mineral Mimic
Note on Image Identification: Textile
N/A (Anthropogenic material)
not a rock
Banded Gneiss
Gneiss (Foliated Metamorphic Rock)
metamorphic
Conglomerate
Conglomerate (Clastic Sedimentary Rock)
sedimentary
Luminous Stone (Glow-in-the-dark Synthetic/Man-made Stone)
Strontium Aluminate tinted glass or resin (Crystalline silicate/oxide mix)
mineral (synthetic)
Grey Chalcedony
Silicon Dioxide (SiO2)
mineral
Diamond (as featured in jewelry)
Diamond (C - pure carbon)
mineral
Quartzite (or Quartz Slab)
SiO2 (Silicon Dioxide)
metamorphic
Rough Sapphire (Corundum)
Corundum (Al2O3)
mineral
Blue quartzite or blue aventurine glass-like aggregate
Quartzite, predominantly SiO₂ (identification uncertain from image)
metamorphic
Asphalt (Bituminous Pavement Bit)
Bitumen-bound aggregate (Petrochemical-bound composite)
sedimentary (anthropogenic/technogenic)
Ruby in Matrix
Corundum (Al2O3)
mineral
Unakite
Altered Granite (Epidotized Granite)
metamorphic
Gastly (Trick or Trade Halloween Series)
Cellulose-carbonaceous composite (Lignocellulose laminated with pigmentary polymers)
Mineral (Synthetic - Paper and Ink Polymorph)
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Pink Granite
Phaneritic Felsic Igneous Rock (Granite)
igneous
Diamond
Carbon (C)
mineral
Opal (in Jewelry Setting)
Hydrated Silicon Dioxide (SiO2·nH2O)
gemstone
Tourmalinated Quartz
Quartz (SiO2) with included Tourmaline (complex borosilicate)
Mineral composite
Gypsum (Satin Spar / Alabaster variety)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
mineral
Fossil Shark Tooth
Lamniform (Mackerel Shark) fossil tooth, likely Otodus or Cretalamna
fossil
Goldstone (aventurine glass)
Synthetic copper-bearing soda-lime glass; commonly sold as red goldstone
gemstone
Beaded gemstone bracelet
Indeterminate; likely small polished mineral beads, possibly turquoise or dyed stone, with metal and glass components
gemstone
Diamond in Kimberlite
Diamond (C in Kimberlite)
igneous
Malaysian 50 Sen Coin
Coinage (specific alloy unknown without metallurgical analysis, but typically brass or bronze for this denomination and era)
Man-made object (coin)
Chalk
Micrite (primarily Calcium Carbonate, CaCO3)
sedimentary
Diamond
Diamond (pure Carbon, C)
mineral
Tiger Shark Fossil Tooth
Galeocerdo cuvier (fossilized)
sedimentary
Sandstone Concretion
Sedimentary concretion
Sedimentary
Turquoise
Hydrous phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
gemstone
Polished amethyst-bearing quartz
Quartz, SiO₂; purple coloration from irradiation and trace iron
mineral
Pearl
Biogenic CaCO3 (Aragonite and Calcite)
mineral
Diamond
Carbon (C)
mineral
Blue Lace Agate
Chalcedony (SiO2) with trace inclusions
mineral
Freshwater Pearl
Calcium Carbonate (CaCO3) - Aragonite/Calcite organic composite
gemstone
Iron-Nickel Meteorite (Possible Chondrite or Oxidized Iron)
Siderite (Nickel-Iron) or Chondrite (Si/Fe composite)
igneous
Polished stromatolite (likely fossilized microbial mat)
Fossil stromatolite; chiefly microcrystalline quartz (SiO₂), commonly replacing carbonate
fossil