Diamond (as featured in jewelry)
Diamond (C - pure carbon)
Category
Browse mineral (man enhanced) specimens identified by the Rock Identifier community.
Diamond (as featured in jewelry)
Diamond (C - pure carbon)
Dyed Aura Quartz
Silicon Dioxide (SiO2) with metallic coating
Slag (Industrial Byproduct)
Artificial silicate/iron byproduct
Sandstone Concretion
Clastic Sedimentary Concretion (typically Quartz/Silica with Iron Oxide)
Polymer Clay (Mock Mineral)
Polyvinyl chloride (PVC) with plasticizers and pigment
Opalite
Opalescent Glass (SiO2 + coloring agents)
Green Fluorite (likely synthetic or heat-treated for jewelry)
Calcium Fluoride (CaF2)
Titanium-coated Metal Cube (Man-made Fidget Toy)
Titanium-anodized or electroplated alloy (e.g., Ti-coated Zinc or Aluminum)
Carnelian Agate
Silicon Dioxide (SiO2) with iron oxide impurities
Dyed Agate
Silicon Dioxide (SiO2) with artificial pigment
Opalite
Synthetic Opalite Glass (Silicon Dioxide)
Ruby in Matrix
Corundum (Al2O3)
Opalite
Synthetic Opalised Glass
Ocean Jasper Mushroom
Orbicular Jasper (Silicon Dioxide, SiO2 mixed with various impurities)
Druzy Quartz
Silicon Dioxide (SiO2)
Titanium Aura Quartz (Bismuth-coated Druzy)
Silicon Dioxide (SiO2) with Titanium/Metal vapor coating
Bouncy Ball (Synthetic Rubber Polymer)
Polybutadiene / Ethylene Vinyl Acetate (EVA)
Sandstone Concretion
Septarian or Carbonate-cemented Sandstone Concretion
Libyan Desert Glass
Tektite (high-silica impact glass), SiO2
Slag
Metallurgical by-product
Carnelian Agate
Silicon Dioxide (SiO2) - variety Carnelian (Chalcedony)
Pyrite in Quartz (Drill Core)
Silicon Dioxide (SiO2) with Iron Sulfide (FeS2) inclusions
Black Opal
Hydrated Silica (SiO2·nH2O)
Aura Quartz
Titanium-coated Silicon Dioxide (SiO2)
Ruby in Fuchsite (often sold as Ruby in Zoisite)
Corundum (Al2O3) in Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
Opalite (Synthetic Moonstone/Sea Opal)
Silicon Dioxide (SiO2) glass with metallic inclusions
Goldstone (Brown/Gold variety)
Aventurine Glass (SiO2 with Copper inclusions)
Blue Cracked Quartz (Dyed Fire Crackle Quartz)
Silicon Dioxide (SiO2) with synthetic dye
Pink Dyed Agate (Banded Chalcedony)
Silicon dioxide (SiO2) - variety Chalcedony
Black Opal
Hydrated Amorphous Silica (SiO2·nH2O)
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).
Asphalt (Road Aggregate)
Bituminous Conglomerate / Asphalt Concrete
Strawberry Quartz
Silicon Dioxide (SiO2) with Hematite/Goethite inclusions
Blue Apatite
Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)
Opalite
Synthetically produced glass (Silicon Dioxide with metallic inclusions)
Agate (Polished Slice)
Banded Chalcedony (SiO2)
Carnelian (a variety of Chalcedony)
Cryptocrystalline Quartz (SiO2) with iron oxide inclusions
Green glass sphere/marble
Soda-lime glass (primarily SiO2, Na2O, CaO)
Fluorite (Polished Point/Tower)
Calcium Fluoride (CaF2)
Boulder Opal
Precious Opal in Ironstone (Amorphous Hydrated Silica, SiO2·nH2O)
Onyx (Black Onyx)
Onyx (Silicon Dioxide, SiO2)
Dyed Agate
Silicon Dioxide (SiO2)