Apatite
Apatite group mineral (e.g., Fluorapatite - Ca5(PO4)3F, Chlorapatite - Ca5(PO4)3Cl, Hydroxylapatite - Ca5(PO4)3(OH))
Category
Browse mineral (synthetic glass) specimens identified by the Rock Identifier community.
Apatite
Apatite group mineral (e.g., Fluorapatite - Ca5(PO4)3F, Chlorapatite - Ca5(PO4)3Cl, Hydroxylapatite - Ca5(PO4)3(OH))
Blue Tiger's Eye
Riebeckite (crocidolite variety)
Lapis Lazuli
A metamorphic rock primarily composed of lazurite (Na,Ca)8[(S,SO4,Cl)2|(Al6Si6O24)], calcite (CaCO3), and pyrite (FeS2).
Note: Item is not a geological specimen
Guitar Components (Steel, Nickel, Plastic, Wood)
Titanium-coated Metal Cube (Man-made Fidget Toy)
Titanium-anodized or electroplated alloy (e.g., Ti-coated Zinc or Aluminum)
Faceted Glass (Costume Jewelry)
Amorphous Silicon Dioxide with colorants (Glass)
Magnetic Hematite
Magnetized Hematite (an iron oxide mineral, Fe2O3, that has undergone magnetization)
Emerald
Beryl (variety Emerald), Be3Al2Si6O18 with Cr and/or V
Prehnite
Prehnite, Ca2Al2Si3O10(OH)2
Shale with Vein Infillings
Shale (a fine-grained clastic sedimentary rock). The veins could be Calcite (CaCO3), Quartz (SiO2), or other minerals.
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(F,OH)2)
Asphalt (Bituminous Concrete)
Bituminous Concrete / Pavement
N/A - Image is non-geological
Acrylonitrile Butadiene Styrene (ABS) or Polypropylene (PP)
Snowflake Obsidian
Spherulitic Obsidian (Amorphous volcanic glass with Phenocrysts of Cristobalite)
Portable Ceramic Space Heater
Polished Acrylonitrile Butadiene Styrene (ABS) Plastic with Ceramic Heating Elements
Snowflake Obsidian
Volcanic Glass (SiO2 + impurities)
Muscovite Schist
Mica Schist (primarily KAl2(AlSi3O10)(OH)2)
Snowflake Obsidian
Volcanic Glass with Cristobalite inclusions
Snowflake Obsidian
Spherulitic Obsidian (primarily SiO2 with Cristobalite inclusions)
Quartz with Muscovite Mica
SiO2 with KAl2(AlSi3O10)(OH)2
Green Aventurine
Aventurine Quartz (SiO2 + Fuchsite mica)
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
Sea Glass (Frosted Quartz/Glass)
Amorphous Silicon Dioxide (SiO2)
Snowflake Obsidian
Volcanic glass with Cristobalite inclusions (mostly SiO2)
Obsidian
Obsidian (principally SiO2 - Silicon Dioxide)
Obsidian
Volcanic Glass (SiO2 + minor impurities)
Blue Slag Glass
Amorphous Silica (Industrial byproduct)
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
Aventurine Quartz
Silicon Dioxide (SiO2) with Fuchsite inclusions
Beads (likely glass or man-made material)
N/A (artificial material)
Obsidian
Obsidian (Volcanic Glass)
Snowflake Obsidian
Spherulitic Volcanic Glass (primarily SiO2 with Cristobalite inclusions)
Iron-stained Quartz
Silicon Dioxide with Iron Oxide (SiO2 with Limonite/Hematite impurities)
Obsidian
Volcanic Glass (SiO2 - Silicon Dioxide with impurities)
Goldstone
Not a natural mineral or rock. It is an ornamental glass.
Snowflake Obsidian
Volcanic glass with Cristobalite inclusions (70–75% SiO2)
Blue Goldstone
Aventurine Glass (Silicon Dioxide with metal inclusions)
Snowflake Obsidian
Volcanic glass containing Spherulite inclusions (primarily Cristobalite, SiO2)
Green glass sphere/marble
Soda-lime glass (primarily SiO2, Na2O, CaO)
Green Glass Cullet / Recycled Glass
Amorphous Silicon Dioxide (SiO2) with various metal oxides