Goldstone (Brown/Gold variety)
Aventurine Glass (SiO2 with Copper inclusions)
Category
Browse mineral (synthetic glass) specimens identified by the Rock Identifier community.
Goldstone (Brown/Gold variety)
Aventurine Glass (SiO2 with Copper inclusions)
Black Tourmaline
Schorl (Na(Fe²⁺)₃Al₆(OH)₄(BO₃)₃Si₆O₁₈)
Jewelry Chain with Blue and Clear Gemstones (Likely Cubic Zirconia)
Cubic Zirconia (ZrO₂), Silver or White Gold/Platinum Alloy
Ruby
Corundum (mineral species), variety: Ruby (Al2O3 with Cr3+ as the chromophore)
Moonstone (bead form)
Potassium Aluminum Silicate (KAlSi3O8) - a variety of Orthoclase Feldspar
Note: Item is not a geological specimen
Guitar Components (Steel, Nickel, Plastic, Wood)
Blue Tiger's Eye
Riebeckite (crocidolite variety)
Titanium-coated Metal Cube (Man-made Fidget Toy)
Titanium-anodized or electroplated alloy (e.g., Ti-coated Zinc or Aluminum)
Lapis Lazuli
A metamorphic rock primarily composed of lazurite (Na,Ca)8[(S,SO4,Cl)2|(Al6Si6O24)], calcite (CaCO3), and pyrite (FeS2).
Sapphire
Corundum (Al₂O₃) with trace elements causing color variations.
Apatite
Apatite group mineral (e.g., Fluorapatite - Ca5(PO4)3F, Chlorapatite - Ca5(PO4)3Cl, Hydroxylapatite - Ca5(PO4)3(OH))
Prehnite
Prehnite, Ca2Al2Si3O10(OH)2
Magnetic Hematite
Magnetized Hematite (an iron oxide mineral, Fe2O3, that has undergone magnetization)
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(F,OH)2)
Emerald
Beryl (variety Emerald), Be3Al2Si6O18 with Cr and/or V
Faceted Glass (Costume Jewelry)
Amorphous Silicon Dioxide with colorants (Glass)
Snowflake Obsidian
Obsidian with Cristobalite inclusions
Green glassy slag or manufactured glass bead
Noncrystalline silicate glass; likely industrial glass/slag, not a true mineral
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
Snowflake Obsidian
Volcanic Glass with Cristobalite inclusions (SiO2)
N/A - Image is non-geological
Acrylonitrile Butadiene Styrene (ABS) or Polypropylene (PP)
Shale with Vein Infillings
Shale (a fine-grained clastic sedimentary rock). The veins could be Calcite (CaCO3), Quartz (SiO2), or other minerals.
Quartz with Muscovite Mica
Silicon Dioxide (SiO2) with Potassium Aluminum Silicate Hydroxide (KAl2(AlSi3O10)(OH)2)
Portable Ceramic Space Heater
Polished Acrylonitrile Butadiene Styrene (ABS) Plastic with Ceramic Heating Elements
Snowflake Obsidian
Volcanic Glass with Cristobalite inclusions (SiO2)
Snowflake Obsidian
Spherulitic Volcanic Glass (primarily SiO2)
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(F,OH)2)
Milky Quartz
Silicon Dioxide (SiO2)
Muscovite Mica
KAl2(AlSi3O10)(F,OH)2
Snowflake Obsidian
Volcanic Glass (SiO2) with Cristobalite inclusions
Asphalt (Bituminous Concrete)
Bituminous Concrete / Pavement
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(F,OH)2)
Snowflake Obsidian
Spherulitic Obsidian (Volcanic Glass with Cristobalite)
Snowflake Obsidian
Spherulitic Obsidian (Amorphous volcanic glass with Phenocrysts of Cristobalite)
Snowflake Obsidian
Volcanic Glass (SiO2 + impurities)
Snowflake Obsidian
Hydrated Volcanic Glass with Cristobalite inclusions
Snowflake Obsidian (Polished Cabochon)
Obsidian with Spherulitic Cristobalite (SiO2)
Quartz (Clear/Milky)
Silicon Dioxide (SiO2)
Muscovite Mica
Muscovite, KAl2(AlSi3O10)(OH)2
Green Aventurine
Aventurine Quartz (SiO2 + Fuchsite mica)
Green Aventurine
SiO2 (Silicon Dioxide with Fuchsite inclusions)