Gneiss
Gneiss
metamorphic
Category
Igneous And Sedimentary Mixture
Browse igneous and sedimentary mixture specimens identified by the Rock Identifier community.
Gneiss (Banded Gneiss)
Gneiss
metamorphic
Gneiss
Gneiss
metamorphic
Quartz (Milky/Smoky variety)
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Carnelian
Carnelian (Silica, SiO2)
mineral
Schist
Mica Schist
metamorphic
Greenstone / Chert
Cryptocrystalline Quartz (SiO2) or Altered Basalt
sedimentary or metamorphic
Quartz
Silicon Dioxide (SiO2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Quartz (Milky or Rough Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Iron-stained)
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss
metamorphic
Botryoidal Agate
Chalcedony (Silicon Dioxide, SiO2)
mineral
Red Quartz (Carnelian/Red Jasper Agate)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
mineral
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Rough Agate/Chert Nodules
Cryptocrystalline Quartz (SiO2)
sedimentary
Red Jasper (Chert)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Citrine
Silicon Dioxide (SiO2)
mineral
Biotite on Matrix
Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)
mineral
Assorted Decorative Tumbled Stones (Quartz, Sodalite, Aventurine, Calcite)
Mixed Silicates and Carbonates (SiO2, Na8(Al6Si6O24)Cl2, CaCO3)
mineral
Black Tourmaline
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz with Iron Inclusions
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Amethyst
Silicon dioxide (SiO2) with iron impurities
mineral
Quartz Druze (Crystalline Quartz)
Silicon Dioxide (SiO2)
mineral
Sandstone (Quartzose)
Arenite (composed primarily of SiO2)
sedimentary
Dalmatian Jasper (or Dalmatian Stone)
Dalmatian Stone (A peralkaline felsite composed of feldspar, quartz, and sodic amphibole)
igneous
Quartz (pebble)
Quartz (SiO₂)
Mineral
Jasper
Jasper (Silicon Dioxide, SiO2 plus iron oxide impurities)
sedimentary
Gold
Native Gold (Au)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Quartz (Milky Quartz)
Quartz (SiO2 - Silicon Dioxide)
Mineral
Limestone (specifically Bituminous or Carbonaceous Limestone)
Calcium Carbonate (CaCO3) with Organic Impurities
sedimentary
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Pyrite
Iron Disulfide (FeS2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Amphibolite (specifically Hornblende Schist/Gneiss)
Amphibole-rich Metamorphic Rock
metamorphic
Pyrite
Iron Sulfide (FeS2)
mineral
Granite Gneiss with Garnet
Garnetiferous Gneiss
metamorphic
Gneiss
Gneiss
metamorphic