Blue Topaz
Topaz [Al2SiO4(F,OH)2]
Category
Browse mineraloid like synthetic material specimens identified by the Rock Identifier community.
Blue Topaz
Topaz [Al2SiO4(F,OH)2]
Amethyst (Tumbled/Weathered Quartz)
Amethyst (SiO2 with iron impurities)
Smoky Quartz
Silicon Dioxide (SiO2)
Smoky Quartz
Smoky Quartz (Silicon Dioxide - SiO2)
Rough Citrine Quartz
Silicon Dioxide (SiO2) with ferric iron impurities
Silicon Carbide (Carborundum)
Silicon Carbide (SiC)
Banded Black Onyx (Chalcedony)
Silicon Dioxide (SiO₂)
Petrified Wood
Silicified Wood (SiO2)
Ametrine
Ametrine (SiO2 - Silicon Dioxide with trace amounts of Iron)
Colorless faceted gemstone (likely cubic zirconia)
Cubic zirconia, zirconium dioxide (ZrO₂); possibly synthetic quartz or glass imitation
Asphalt Concrete
Bituminous Concrete / Asphaltic Composite
Asphalt (Bituminous Concrete)
Bituminous Concrete / Pavement
Limonite (Ironstone) Concretion
FeO(OH)·nH2O (Hydrous ferric oxide)
Precious Opal
Hydrated Silica (SiO2·nH2O)
Precious Opal
Hydrated Silicon Dioxide (SiO2·nH2O)
Magnetic Hematite
Magnetized Hematite (an iron oxide mineral, Fe2O3, that has undergone magnetization)
Turquoise
Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]
Petrified Wood
Silicified Wood (primarily SiO2)
Green Slag Glass (Cullet)
Amorphous Silica (Industrial Glass Byproduct)
Chalcanthite
Copper(II) sulfate pentahydrate (CuSO4·5H2O)
Likely diamond accent
Diamond (crystalline carbon, C)
Opalite
Man-made opalized glass
Goldstone
Aventurine Glass (SiO2 + Cu small inclusions)
Ruby (set in a gold pendant)
Ruby (Variety of Corundum, Al2O3)
Dalmatian Stone
Dalmatian Stone (Felsic Igneous Rock)
Sapphire (Blue)
Corundum (Al2O3)
White Sapphire
Corundum (Al2O3)
Black Opal (Triplet)
Hydrated Silica (SiO2·nH2O)
Emerald
Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Smoky Quartz
Silicon Dioxide (SiO2)
Quartzite (Engineered Stone)
Silicon Dioxide (SiO2) based synthetic composite
Man-made Jewelry (Metal and Glass/Plastic)
Synthetic Alloy and Amorphous Solid (SiO2/Polymer)
Build-A-Bear Plush (Non-Geological)
Polyester fibers (C10H8O4)n and Synthetic Polymers
Petrified wood
Silicified wood, chiefly microcrystalline quartz (SiO₂)
Emerald
Beryl (Be3Al2(SiO3)6) with trace Chromium/Vanadium
Fossilized wood fragment
Petrified wood; commonly silicified fossil wood (SiO₂ replacing organic tissue)
Rough amethyst-bearing quartz specimens
Quartz, SiO₂; purple coloration from trace iron and irradiation
Tektite (likely indochinite)
Natural silica-rich impact glass; predominantly amorphous SiO₂ with aluminum, iron, magnesium, calcium, and sodium
Red Jasper
Jasper (a variety of Chalcedony, SiO₂)
Petrified Wood
Silicified Wood (SiO2)
Black Obsidian
Volcanic glass (Amorphous silicates)