Quartzite
Quartzite (primarily SiO2)
metamorphic
Category
Industrial Byproduct (Often Mistaken For Obsidian Or Mineral)
Browse industrial byproduct (often mistaken for obsidian or mineral) specimens identified by the Rock Identifier community.
Chert (Chalcedony/Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Pumice
Pumice (volcanic glass froth)
igneous
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Marble
Recrystallized Calcite (CaCO3)
metamorphic
Blue Banded Agate (Dyed)
Silicon Dioxide (SiO2) - Variety of Chalcedony
mineral
Quartzite (Quartz-rich Cobble)
Quartzite (SiO2)
metamorphic
Chert (often called Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Milky Quartz (Tumbled)
Quartz (Silicon Dioxide, SiO2)
mineral
Kunzite (Pink Spodumene)
Spodumene, LiAl(SiO3)2
mineral
Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Ruby and Diamond Heart Pendant
Corundum (Al2O3) and Diamond (C)
mineral
Quartzite Breccia
Brecciated Quartzite (SiO2)
metamorphic
Sandstone
Arenite (primarily SiO2)
sedimentary
Chert (often called Flint)
Chert (Microcrystalline Silicon Dioxide, SiO2)
sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite with Quartz Vein
Metamorphosed sandstone (SiO2)
metamorphic
Quartzite River Rock
Metamorphic Quartzite (primarily SiO2)
metamorphic
Basalt with Magnetite
Crystalline Basalt (Primarily Plagioclase and Pyroxene) with Magnetite (Fe3O4)
igneous
Opalite (Man-made Glass)
Synthetic Silicon Dioxide Glass (SiO2 + metal oxides)
Synthetic Mineral Simulant / Glass
Andesite
Andesite (Intermediate Extrusive Volcanic Rock)
igneous
Red Jasper
Jasper (a variety of Quartz, SiO2)
Mineral
Aquamarine
Beryl (Be3Al2Si6O18)
mineral
Smoky Quartz (with inclusions)
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Agate (Chert/Chalcedony)
Silicon Dioxide (SiO2)
sedimentary
Quartzite River Pebbles
Quartzite (primarily SiO2)
Metamorphic
Chert (specifically Blue or Grey Chert/Flint)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Ferruginous Sandstone
Arenite with Iron-Oxide Cement (SiO2 with Fe2O3/FeO(OH))
sedimentary
Aragonite (variety 'Flos Ferri')
Aragonite (CaCO3)
Mineral
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
Mineral
Quartzite
Quartzite (SiO2)
metamorphic
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Amethyst
SiO2 (Silicon Dioxide)
Mineral
Basalt River Stone
Basaltic Igneous Rock
igneous
Schist
Schist (various mineral compositions)
metamorphic
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Ruby and Diamond in Gold Setting
Corundum (Al2O3) and Diamond (C)
mineral
Rock Crystal Quartz
Quartz (SiO₂)
Mineral
Quartzite Pebble
Quartzite (mostly SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic