Sandstone (Quartzose)
Arenite (composed primarily of SiO2)
Category
Browse sedimentary (processed mineral product) specimens identified by the Rock Identifier community.
Sandstone (Quartzose)
Arenite (composed primarily of SiO2)
Chert (Beach Pebble)
Microcrystalline Quartz (SiO2)
Banded Gneiss with Quartz Vein
Foliated Metamorphic Rock (Gneiss)
White Quartz Star-cut crystal
Silicon Dioxide (SiO2)
Petrified Wood
Silicified Wood (primarily SiO2)
Dyed Agate Slice
Silicon Dioxide (SiO2) with artificial colorants
Quartz Vein in Schist
Quartz (SiO2) in Pelitic Schist
Blue Dyed Agate
Silicon Dioxide (SiO2) with artificial pigment
Red Jasper
Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)
Yellow Calcite
Calcite (Calcium Carbonate, CaCO3)
Green Calcite
Calcium Carbonate (CaCO3)
Honey Calcite
Calcite (Calcium Carbonate, CaCO3)
Dolomite on Prehnite (Saddle-shaped Dolomite)
Dolomite [CaMg(CO3)2] on Prehnite [Ca2Al(AlSi3O10)(OH)2]
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
Red Jasper
Red Jasper (SiO2 with Fe2O3 impurities)
River Cobble (Quartzite-rich Sandstone)
Clastic Sedimentary Rock (Litharenite/Quartzite transition)
Laterite
Laterite (no specific mineral formula as it's a rock type)
Milky or Iron-Stained Quartz
Quartz (Silicon Dioxide, SiO2)
Howlite
Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)
Orange Calcite
Calcium Carbonate (CaCO3)
Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) within Sedimentary or Igneous Matrix
Quartz Pebble
Silicon Dioxide (SiO2)
Fossiliferous Chert (with Brachiopod or Mollusk fragments)
Silicon dioxide (SiO2) with Calcium Carbonate (CaCO3) inclusions
Druzy Quartz on Milky Quartz
Silicon Dioxide (SiO2)
Petrified Wood
Silicified Wood (primarily SiO2)
Quartz Cobble (with Iron Oxide Staining)
Microcrystalline to Macro crystalline Quartz (SiO2)
Blue Chalcedony (likely dyed)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
Jasper with Iron Staining
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) impurities
Red Jasper
Jasper (Silicon Dioxide with Iron Oxide inclusions), SiO2 + Fe2O3
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
Picture Jasper
Silicon Dioxide (SiO2) - Opaque Chert/Quartzite variety
Tiger Jasper (Polychrome Jasper)
Silicon Dioxide (SiO2) with iron oxide and other mineral inclusions
Sandstone (Ferruginous)
Arenite (composed primarily of SiO2 with Fe2O3 cement)
Petrified Wood
Silicified Wood (primarily SiO2)
Petrified Wood
Silicified Wood (SiO2)
Cubic Zirconia
Zirconium dioxide (ZrO2)
Banded Gneiss
Gneiss (Metamorphic rock of variable mineralogy, often quartz-feldspar base)
Yellow Jasper
Silicon Dioxide with Limonite/Goethite inclusions (SiO2)
Chert (specifically Gray/Black Chert)
Chert (Microcrystalline or Cryptocrystalline Quartz, SiO2)
Gastropod Fossil (Snail Stone or Steinkern)
Class Gastropoda (Calcium Carbonate - CaCO3 / Silica - SiO2 replacing original shell)
Petrified Wood
Silicified Wood (SiO2)