Hematite (Tumbled)
Iron(III) oxide (Fe2O3)
mineral
Category
Sedimentary And Igneous (Mixed)
Browse sedimentary and igneous (mixed) specimens identified by the Rock Identifier community.
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Conglomerate with Quartz Inclusions
Conglomerate (clastic sedimentary rock) with internal Quartz (SiO2)
sedimentary
Coarse Sand Grain / Lithic Fragment
Clastic Sediment (Lithic fragment or Quartz/Feldspar grain)
sedimentary
Quartz / Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Pyrite in Matrix (Commonly called Fool's Gold)
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Gneiss (specifically Granitic Gneiss)
Gneiss (composed primarily of Quartz, Feldspar, and Biotite/Amphibole)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Gneiss
High-grade foliated metamorphic rock
metamorphic
Turquoise and Hematite
CuAl6(PO4)4(OH)8·4H2O (Turquoise) and Fe2O3 (Hematite)
mineral
Grey Chalcedony (Tumbled)
Chalcedony (SiO2)
mineral
Quartz
Silicon Dioxide (SiO₂)
Mineral
Milky Quartz (or Vein Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky or Common Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO₂)
mineral
Gneiss (specifically Banded Gneiss)
Gneiss
metamorphic
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Quartz (Milky/Smoky variety)
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss
metamorphic
Gneiss (Banded Gneiss)
Gneiss
metamorphic
Gneiss
Gneiss
metamorphic
Granite Gneiss
Felsic Gneiss
metamorphic
Clear Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Pyrite (Iron Pyrite)
Iron Sulfide (FeS2)
mineral
Hematite
Ferric oxide (Fe2O3)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Clear Quartz Crystal Cluster
Silicon Dioxide (SiO2)
mineral
Chalcedony (Agate/Carnelian precursor)
Chalcedony (Silicon Dioxide, SiO2)
mineral
Carnelian
Carnelian (Silica, SiO2)
mineral
Schist
Mica Schist
metamorphic
Quartz (Milky/Iron-stained)
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss
metamorphic
Greenstone / Chert
Cryptocrystalline Quartz (SiO2) or Altered Basalt
sedimentary or metamorphic
Botryoidal Agate
Chalcedony (Silicon Dioxide, SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Quartz (Milky or Rough Quartz)
Silicon Dioxide (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