Arsenopyrite in Sulphide Ore
Arsenopyrite (FeAsS)
mineral
Category
Synthetic Glass (Often Categorized As A Simulated Mineral)
Browse synthetic glass (often categorized as a simulated mineral) specimens identified by the Rock Identifier community.
Learn about Synthetic Glass (Often Categorized As A Simulated Mineral) in the encyclopedia
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Quartzite
Metamorphic Quartz Rock (SiO2)
metamorphic
Quartzite (Yellow/Iron-stained Quartz)
Quartzite (primarily SiO2 with iron oxide impurities)
metamorphic
Citrine or Yellow Quartz
Quartz (SiO2) with iron impurities
mineral
Chert (Flint)
Chert (SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (SiO2 principal)
sedimentary
Rose Quartz
SiO2 (Silicon Dioxide with trace amounts of iron, manganese, or titanium)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Chert (Flint variety)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Jasper (specifically Yellow/Red Jasper)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon dioxide (SiO2)
mineral
Ferruginous Quartz (Iron-stained Quartzite)
Silicon Dioxide (SiO2) with iron oxide inclusions
metamorphic
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) within Sedimentary/Metamorphic Matrix
Metamorphic or Igneous (context dependent)
Snowflake Obsidian
Spherulitic Volcanic Glass (SiO2 + impurities)
igneous
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Celestite (Celestine)
Strontium Sulfate (SrSO4)
mineral
Quartz (Clear or Milky)
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone with Iron Staining
Clastic sedimentary rock (primarily SiO2 with Fe2O3)
sedimentary
Quartzite with Mica Matrix
Metamorphic Quartz-Mica Schist/Quartzite
metamorphic
Blue quartz-like mineral specimen
Likely quartz (SiO₂), possibly dyed or coated; exact identification requires testing
mineral
Sandstone
Arenite (primarily Quartz, SiO2)
sedimentary
Pyrite (Fool's Gold) in Matrix
Iron Sulfide (FeS2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Quartzite with Calcite Tufa
Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3)
metamorphic
Amethyst
Amethyst (a variety of Quartz, SiO2)
Mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Rose Quartz / Iron-stained Quartz
SiO2 (Silicon Dioxide)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace impurities of titanium, iron, or manganese
mineral
Aquamarine
Beryl (Be3Al2Si6O18 with iron impurities)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Iron-stained Quartzite
Metamorphosed Quartz (SiO2) with Hematite/Limonite impurities
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Chert (specifically Flint or Gray Chert)
Silicon Dioxide (Microcrystalline Quartz), SiO2
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone (Ferruginous)
Arenite (with Iron Oxide)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary