Diamond (as featured in jewelry)
Diamond (C - pure carbon)
mineral
Category
Mineral (Man Enhanced)
Browse mineral (man enhanced) specimens identified by the Rock Identifier community.
Dyed Aura Quartz
Silicon Dioxide (SiO2) with metallic coating
mineral
Slag (Industrial Byproduct)
Artificial silicate/iron byproduct
Mineral description (Anthropogenic material)
Sandstone Concretion
Clastic Sedimentary Concretion (typically Quartz/Silica with Iron Oxide)
sedimentary
Polymer Clay (Mock Mineral)
Polyvinyl chloride (PVC) with plasticizers and pigment
Synthetic material (Not a natural rock/mineral)
Opalite
Opalescent Glass (SiO2 + coloring agents)
Mineral (Synthetic/Man-made)
Green Fluorite (likely synthetic or heat-treated for jewelry)
Calcium Fluoride (CaF2)
mineral
Titanium-coated Metal Cube (Man-made Fidget Toy)
Titanium-anodized or electroplated alloy (e.g., Ti-coated Zinc or Aluminum)
Mineral alternative / Synthetic
Carnelian Agate
Silicon Dioxide (SiO2) with iron oxide impurities
mineral
Dyed Agate
Silicon Dioxide (SiO2) with artificial pigment
mineral
Opalite
Synthetic Opalite Glass (Silicon Dioxide)
mineraloid (man-made)
Ruby in Matrix
Corundum (Al2O3)
mineral
Opalite
Synthetic Opalised Glass
mineral
Ocean Jasper Mushroom
Orbicular Jasper (Silicon Dioxide, SiO2 mixed with various impurities)
mineral
Druzy Quartz
Silicon Dioxide (SiO2)
mineral
Titanium Aura Quartz (Bismuth-coated Druzy)
Silicon Dioxide (SiO2) with Titanium/Metal vapor coating
mineral
Bouncy Ball (Synthetic Rubber Polymer)
Polybutadiene / Ethylene Vinyl Acetate (EVA)
Synthetic material (Not a rock or mineral)
Sandstone Concretion
Septarian or Carbonate-cemented Sandstone Concretion
sedimentary
Libyan Desert Glass
Tektite (high-silica impact glass), SiO2
mineral
Slag
Metallurgical by-product
Anthropogenic (Man-made material)
Carnelian Agate
Silicon Dioxide (SiO2) - variety Carnelian (Chalcedony)
Mineral
Pyrite in Quartz (Drill Core)
Silicon Dioxide (SiO2) with Iron Sulfide (FeS2) inclusions
igneous/metamorphic (hydrothermal)
Black Opal
Hydrated Silica (SiO2·nH2O)
mineral
Aura Quartz
Titanium-coated Silicon Dioxide (SiO2)
mineral
Ruby in Fuchsite (often sold as Ruby in Zoisite)
Corundum (Al2O3) in Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Opalite (Synthetic Moonstone/Sea Opal)
Silicon Dioxide (SiO2) glass with metallic inclusions
Synthetic/Man-made Glass
Goldstone (Brown/Gold variety)
Aventurine Glass (SiO2 with Copper inclusions)
Synthetic/Man-made glass (often mistaken for a mineral)
Blue Cracked Quartz (Dyed Fire Crackle Quartz)
Silicon Dioxide (SiO2) with synthetic dye
mineral
Pink Dyed Agate (Banded Chalcedony)
Silicon dioxide (SiO2) - variety Chalcedony
mineral
Black Opal
Hydrated Amorphous Silica (SiO2·nH2O)
Mineral
Metal Alloy (Likely Pewter or Sterling Silver)
Not a natural geological specimen; composed of refined metals. If pewter, it's a tin-based alloy. If sterling silver, it's 92.5% silver and 7.5% other metals (usually copper).
Man-made material (metal)
Asphalt (Road Aggregate)
Bituminous Conglomerate / Asphalt Concrete
Anthropogenic (Man-made)
Strawberry Quartz
Silicon Dioxide (SiO2) with Hematite/Goethite inclusions
mineral
Blue Apatite
Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)
mineral
Opalite
Synthetically produced glass (Silicon Dioxide with metallic inclusions)
Mineraloid (Man-made Glass)
Agate (Polished Slice)
Banded Chalcedony (SiO2)
mineral
Carnelian (a variety of Chalcedony)
Cryptocrystalline Quartz (SiO2) with iron oxide inclusions
Mineral
Green glass sphere/marble
Soda-lime glass (primarily SiO2, Na2O, CaO)
Man-made object (Simulant)
Fluorite (Polished Point/Tower)
Calcium Fluoride (CaF2)
mineral
Boulder Opal
Precious Opal in Ironstone (Amorphous Hydrated Silica, SiO2·nH2O)
Mineral
Onyx (Black Onyx)
Onyx (Silicon Dioxide, SiO2)
mineral
Dyed Agate
Silicon Dioxide (SiO2)
mineral