Quartz (Iron-stained)
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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Agate
Silicon dioxide (Chalcedony), SiO2
gemstone
Feldspar
Triclinic or Monoclinic Tectosilicate (e.g., KAlSi3O8)
mineral
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
White Agate / Chalcedony
Silicon Dioxide (SiO2)
gemstone
Quartz River Rock
Silicon Dioxide (SiO2)
mineral
Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Quartz (SiO2)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Magnetite / Hematite (Iron Ore)
Magnetite (Fe3O4) or Hematite (Fe2O3)
mineral
Clear Quartz Point
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Banded Agate
Chalcedony (Silicon Dioxide, SiO2)
sedimentary
Gneiss
Gneiss
metamorphic
Chalcedony (Tumbled Agate/Jasper)
Silicon dioxide (SiO2)
sedimentary
Smoky Quartz
Silicon dioxide (SiO2)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz (Small Fragment)
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Clear Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz/White Quartz
Silicon Dioxide (SiO2)
mineral
Pink Garnet (likely Almandine or Rhodolite)
Garnet Group (Fe3Al2(SiO4)3 to Mg3Al2(SiO4)3)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz Pebble with Chert
Silicon Dioxide (SiO2)
mineral
Quartz (Drusy/Crystalline)
Silicon Dioxide (SiO2)
mineral
Specular Hematite
Hematite (Fe2O3)
mineral
Citrine
SiO2 (Silicon Dioxide)
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Chalcedony (Agate)
Silicon Dioxide (SiO2)
mineral
Pyrite and Quartz Agglomerate
Iron Sulfide (FeS2) with Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Dalmatian Stone
Peralkaline Feldsphathic Igneous Rock
igneous
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Gold Nugget
Native Gold (Au)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartzite with Mafic Intrusion (Gneiss/Schist Contact)
Metamorphic Quartzite (SiO2) with Amphibole/Biotite Schist
metamorphic