Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Category
Sedimentary And Igneous (Mixed)
Browse sedimentary and igneous (mixed) specimens identified by the Rock Identifier community.
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Granitic Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Gneiss (with iron staining)
Gneiss
metamorphic
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
mineral
White Agate (Chalcedony)
Agate (Silicon Dioxide - SiO2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Quartz (Clear/White)
Silicon Dioxide (SiO2)
mineral
Gneiss
High-grade regional metamorphic rock (Foliated)
metamorphic
Gneiss
Gneiss
metamorphic
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Gneiss
Gneiss
metamorphic
White Quartz Pebbles
Quartz (Silicon Dioxide, SiO2)
Mineral
Carnelian Agate
Carnelian (SiO2 with iron oxide impurities)
mineral
Banded Agate (Pink Chalcedony)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Fluorite (Blue)
Calcium Fluoride (CaF2)
mineral
Banded Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Blue Calcite
Calcium Carbonate (CaCO3)
Mineral
Gneiss
Gneiss (High-grade Regional Metamorphism)
metamorphic
Feldspar
Potassium Feldspar (KAlSi3O8)
mineral
Magnetite or Magnetic Iron Ore
Magnetite (Fe3O4)
mineral
Banded Gneiss
Gneiss (high-grade metamorphic silicate rock)
metamorphic
Pyrite
Iron Sulfide (FeS2)
mineral
Amethyst with Marcasite accents
Amethyst (Silicon Dioxide SiO2) and Marcasite (Iron Sulfide FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Hematite (Tumbled)
Iron(III) oxide (Fe2O3)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Chalcedony (Agate/Jasper mix)
Cryptocrystalline Sillimanite (Quartz) - SiO2
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
Hematite
Iron(III) oxide (Fe2O3)
mineral
Dalmatian Jasper (or Dalmatian Stone)
Dalmatian Stone (A peralkaline felsite composed of feldspar, quartz, and sodic amphibole)
igneous
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Banded Carnelian Agate
Silicon Dioxide (SiO2)
sedimentary
Jasper with Epidote
Silicon Dioxide (SiO2) with Calcium Aluminum Iron Silicate Hydrate
sedimentary
Coarse Sand or Fine Gravel
Detrital Sedimentary Fragments (mostly SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary