Orange Quartzite / Aventurine
Silicon Dioxide (SiO2)
metamorphic
Category
Mineral And Glass
Browse mineral and glass specimens identified by the Rock Identifier community.
Orange Quartzite / Carnelian Agate
Silicon Dioxide (SiO2)
metamorphic
Sandstone (Ferruginous)
Arenite (Fe-oxide cemented)
sedimentary
Milky Quartz with Iron Inclusions
Quartz (Silicon Dioxide, SiO2)
mineral
Druzy Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Clear Quartz (Rock Crystal)
Quartz (Silicon Dioxide, SiO2)
mineral
Chert / Flint
Microcrystalline Quartz (SiO2)
sedimentary
Quartz Crystal Cluster
Quartz (Silicon Dioxide, SiO2)
mineral
Blue Quartzite
Blue Quartzite (Primary mineral: Quartz, SiO2 with magnesio-riebeckite or crocidolite inclusions)
metamorphic
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Aquamarine on Feldspar Matrix
Beryl (Be3Al2Si6O18) with Potassium Feldspar (KAlSi3O8)
mineral
Chert (Flint Pebbles)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Amethyst
Silicon dioxide (SiO2)
mineral
Red Moss Agate (Jasper)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
sedimentary
Chert (varietal Flint)
Silicon Dioxide (SiO2)
sedimentary
Polished Basalt
Basalt (Mafic volcanic rock)
Igneous
Chert / Flint
Chert (varietal name for microcrystalline quartz). Chemical formula: SiO₂
Mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Sulfur (with possible Cullet Glass or Slag imitation)
Native Sulfur (S8)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Mineral
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
Mineral (Variety of Quartz)
Chert (Jasper/Flint variety)
Microcrystalline quartz (SiO2)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Jasper/Chalcedony)
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone (Quartzite-rich Pebble)
Arenite (primarily SiO2)
sedimentary
Amethyst (Agate/Chalcedony variety)
Silicon Dioxide (SiO2) with iron impurities
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Blue Quartzite
Quartzite with inclusions (often Dumortierite or Magnesio-riebeckite)
metamorphic
Sandstone (likely Quartzose Sandstone)
Arenite (primarily SiO2)
sedimentary
Clear Quartz
Silicon Dioxide (SiO2) / Rock Crystal
mineral
Porous Quartzite
Metamorphosed Quartz-rich Sandstone (SiO2)
metamorphic
Amethyst
Amethyst (Silicon Dioxide, SiO2 + Fe)
mineral
Chert (specifically Agate/Jasper variety)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Jasper (Banded Argillite/Chert mix)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Sandstone (Weathered Pebble)
Arenite (primarily SiO2)
sedimentary
Sandstone (Quartzose Pebble)
Clastic Sedimentary Rock (Litharenite/Quartz arenite)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with traces of titanium, manganese, or iron
mineral
Basalt with vesicles/amygdules
Basalt (containing volcanic glass and plagioclase)
igneous
Obsidian (specifically Silver Sheen Obsidian)
Volcanic Glass (approx. 70–75% SiO2 plus MgO, Fe3O4)
igneous
Peridot (Olivine)
Olivine (Magnesium Iron Silicate - (Mg, Fe)2SiO4)
mineral