Chert / Flint
Silicon Dioxide (SiO2)
Category
Browse man made glass mineral simulant specimens identified by the Rock Identifier community.
Chert / Flint
Silicon Dioxide (SiO2)
Apatite
Calcium phosphate fluoride/chloride, Ca5(PO4)3(F,Cl,OH)
Quartz pebble
Quartz (Silicon dioxide, SiO2)
Milky Quartz in Shale
Silicon Dioxide (SiO2) in sedimentary host rock
Quartz (Clear Quartz/Rock Crystal)
Silicon Dioxide (SiO2)
Amethyst (Chevron Amethyst/Dream Amethyst)
Silicon Dioxide (SiO2) with trace Iron impurities
Polished white agate or chalcedony bead
Microcrystalline quartz (SiO₂), likely chalcedony/agate with iron-oxide staining or a brown mineral inclusion
Sandstone (with minor weathering/pitting)
Clastic Sedimentary Rock (composed mostly of SiO2)
Quartz (River Pebble)
Silicon Dioxide (SiO2)
Quartz Grain
Silicon Dioxide (SiO2)
Quartz-rich rock, likely milky quartz or quartzite
Quartz (SiO₂); possibly quartzite, a recrystallized quartz sandstone
Quartz with Chalcopyrite (or Pyrite)
Silicon Dioxide (SiO2) with Copper Iron Sulfide (CuFeS2)
Tumbled yellow quartz (likely citrine or iron-stained quartz)
Quartz, SiO₂; yellow color from trace iron or irradiation/heat-related coloration
Muscovite
KAl2(AlSi3O10)(OH)2
Tumbled milky quartz
Quartz, silicon dioxide (SiO₂)
Tumbled quartz (likely rose or milky quartz)
Quartz, silicon dioxide (SiO₂)
Quartzite River Rock with Dendrites
Metamorphosed Quartz-rich Sandstone with Manganese Oxide (MnO2) inclusions
Quartz
Silicon Dioxide (SiO2)
Likely tumbled quartz/chalcedony
Quartz (SiO₂), possibly milky quartz or pale chalcedony
Tumbled white quartz or quartzite pebble
Quartz (SiO₂), possibly massive quartzite
Obsidian
Volcanic Glass (SiO2)
Metallic Ornament / Jewelry
N/A - This is an artificial object, not a geological specimen.
Quartz Pebble
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Granite Pebble
Granite
Milky Quartz
Silicon Dioxide (SiO2)
Quartz Vein in Hematitic Siltstone
Hydrothermal Quartz (SiO2) in Ferriferous Matrix
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Clear Quartz
Silicon Dioxide (SiO2)
Clear Quartz (Tumbled)
Silicon Dioxide (SiO2)
Smoky Quartz
Silicon Dioxide (SiO2)
Quartz (Clear Quartz)
Silicon Dioxide (SiO2)
Clear Quartz
Silicon Dioxide (SiO2)
Clear/White Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
Quartz (Smoky Quartz variant)
Silicon Dioxide (SiO2)
Snowflake Obsidian
Spherulitic Volcanic Glass (SiO2)
Milky quartz (rough quartz specimen)
Quartz, silicon dioxide (SiO₂)
Polished black stone, likely black obsidian
Obsidian (volcanic glass; mainly SiO₂)
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
Milky Quartz (Gold-bearing Prospecting Specimen)
Silicon Dioxide (SiO2)
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)