Moqui Marble (Iron Oxide Concretion)
Iron Oxide Concretion (primarily Limonite/Hematite around a Sandstone center)
sedimentary
Category
Non Geological
Browse non geological specimens identified by the Rock Identifier community.
Learn about Non Geological in the encyclopedia
View all →
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Stromatolite
Cyanobacteria fossilized formation (CaCO3)
sedimentary
Quartz Geode
Quartz (Silicon Dioxide, SiO2) in a Geode
sedimentary
Sandstone (with differential weathering)
Arenite / Quartz Sandstone (SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
mineral
Sandstone with Desert Varnish
Arenite with Ferromanganese patina
sedimentary
Botryoidal Quartz / Calcite Geode crust
Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3)
mineral
Chert with Asphaltum (or Tar)
Silica (SiO2) with natural Bitumen/Asphaltum
sedimentary
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Fossilized Coral (Petoskey-like or Favosites)
Anthozoa (Fossilized Coral)
sedimentary
Sandstone with Liesegang Rings
Arenite with Iron Oxide Concretions
sedimentary
Gowganda Tillite (Puddingstone)
Gowganda Formation Conglomerate
sedimentary
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Petrified Wood
Silicified Wood (primarily Silicon Dioxide, SiO2)
mineral
Chert / Flint Nodule
Microcrystalline Quartz (SiO2)
sedimentary
White Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Porphyry
Porphyritic igneous rock
igneous
Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Quartz (specifically Clear or Rose Quartz)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz (Field Specimen)
Silicon Dioxide (SiO2)
mineral
Milky Quartz / Chalcedony
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (SiO2)
mineral
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Milky Quartz (Water-worn Pebble)
Quartz (Silicon Dioxide) - SiO2
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Chatoyant or Milky variety)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Granite Pebble
Granite (Felsic Intrusive Igneous Rock)
igneous