Jasper with Quartz Vein
Silicon Dioxide (SiO2) with impurities
sedimentary
Category
Mineral And Glass
Browse mineral and glass specimens identified by the Rock Identifier community.
Rainbow Obsidian
Volcanic glass (SiO2 - approximately 70% or more silicon dioxide)
Igneous
Pink Granite with Quartz Vein
Phaneritic Plutonic Felsic Rock (K-feldspar + Quartz + Plagioclase + Mica)
igneous
Moonstone
Orthoclase feldspar ((K,Na)AlSi3O8)
mineral
Rose Quartz with possible Manganese or Iron inclusions
SiO2 (Silicon Dioxide)
mineral
Tahitian Pearl
Biogenic Calcium Carbonate (Aragonite/Calcite), CaCO3
mineral
Rose Quartz
Silicon Dioxide with trace elements (SiO2 + Ti, Fe, or Mn)
mineral
Red Jasper (Opaque Chalcedony)
Silicon Dioxide (SiO2) with Hematite impurities
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Ferruginous Quartz
Silicon Dioxide with Hematite/Limonite inclusions (SiO2 + Fe2O3)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Chert (Green variety)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Iron Oxide cement)
sedimentary
Sandstone (likely Arkose or Quartz Sandstone)
Arenite (SiO2 principal component)
sedimentary
Granite
Granite (Mainly Quartz, Feldspar, and Mica)
Igneous
Greenstone / Quartzite Pebble
Metamorphosed Quartz-rich Rock
metamorphic
Epidosite
Epidosite (predominantly Epidote {Ca2Al2Fe3+Si3O12(OH)} and Quartz {SiO2})
metamorphic
Quartz with Pyrite inclusions
Silicon Dioxide (SiO2) with Iron Sulfide (FeS2) inclusions
mineral
Quartz (Milky/Iron-stained)
Silicon Dioxide (SiO2)
mineral
Yellow Jasper
Silicon Dioxide (SiO2) - variety of Chalcedony
sedimentary
Amber
Succinite (specifically for Baltic amber); chemical formula approx. C10H16O
Organic Gemstone (fossilized resin)
Quartzite (Iron-stained)
Quartzite (primarily SiO2)
metamorphic
Sandstone (with Iron Oxide staining)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Green Aventurine
Aventurine (a variety of Quartz, SiO2)
Mineral
Muscovite Mica
Muscovite - KAl2(AlSi3O10)(OH)2
mineral
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Obsidian
Volcanic Glass (Primary composition: SiO2 - Silicon Dioxide)
Igneous
Chert (Yellow Jasper/Flint)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) - variety Jasper
sedimentary
Rose Quartz
SiO2 (Silicon Dioxide)
mineral
Quartzite with inclusions
Quartzite
metamorphic
Chert (and Limestone)
Chert (consisting of Microcrystalline Quartz, SiO2)
sedimentary
Jasper with Hematite inclusions
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3)
sedimentary
Sandstone (Quartzose)
Arenite (Formula: SiO2 primary, with various cements)
sedimentary
Druzy Quartz (on Geode Fragment)
Silicon Dioxide (SiO2)
mineral
Lapis Lazuli
Lazurite-rich metamorphic rock (approx. Na6Ca2(Al6Si6O24)(S,SO4,Cl)1,2)
metamorphic
Amber
Succinite (with a generalized formula of C10H16O)
mineral
Yellow Quartz (Citrine-colored Quartz Pebble)
Silicon Dioxide (SiO2)
mineral
Amber
Succinite (Carbon-based organic compound; approximate formula C10H16O)
Mineraloid
Cobalt Blue Sea Glass
Amorphous Silica Glass (SiO2 + CoO)
mineraloid / anthropogenic material
Black Obsidian
Obsidian, volcanic glass (Amorphous SiO₂)
Igneous Rock
Clear Quartz (Rock Crystal)
Quartz (Silicon Dioxide, SiO2)
mineral