Chert
Silicon dioxide (SiO2)
Category
Browse sedimentary (chemically precipitated mineral) specimens identified by the Rock Identifier community.
Chert
Silicon dioxide (SiO2)
Orange Calcite
Calcium Carbonate (CaCO3)
Limonite (Iron Ore Congcretion)
Limonite (a mixture of hydrated iron(III) oxide-hydroxides, FeO(OH)·nH2O)
Lazulite
Lazulite (MgAl2(PO4)2(OH)2)
Geode (Small unopened nodule)
Quartz-lined nodule (SiO2)
Banded Iron Formation (BIF)
Banded Iron Formation (Fe2O3 + SiO2)
Quartz Geode
Silicon Dioxide (SiO2)
Botryoidal calcite (likely calcite concretion)
Calcite, calcium carbonate (CaCO₃)
Quartz Pebble
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Druzy Quartz Geode (Oco or Moroccan variety)
Silicon Dioxide (SiO2)
Quartz Geode
Crystalline Silicon Dioxide (SiO2) in a Geode
Quartz Pebble
Silicon Dioxide (SiO2)
Yellow Ochre / Limonite
Limonite (FeO(OH)·nH2O)
Sea Glass (Frosted Glass Fragment)
Amorphous Silica (Anthropogenic Sediment)
Common Opal in Host Rock
Hydrated Silica (SiO2·nH2O)
Chert (White Chert / Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Yellow Quartzite
Silicon Dioxide (SiO2)
Jasper (Green)
Silicon dioxide (SiO2)
Shale or Slate with Quartz Veins
Shale (fine-grained clastic sedimentary rock) or Slate (low-grade metamorphic rock formed from shale) with Quartz (SiO2) veins
Quartz Vein Pebble
Silicon dioxide (SiO2)
Hematite or Goethite-rich Ironstone
Ironstone (Oxidized Iron Ore)
Quartz Pebble
Silicon Dioxide (SiO2)
Aragonite Star Cluster (Cross-section)
Aragonite (Calcium Carbonate, CaCO3)
Quartz Pebble
Silicon Dioxide (SiO2)
Quartz pebble
Silicon dioxide (SiO2)
Fancy Jasper (Agate/Chert mix)
Silicon Dioxide (SiO2) with various inclusions
Quartz Pebble
Quartz (SiO2)
Chert (Nodule)
Silicon Dioxide (SiO2)
Chert (Jasper)
Microcrystalline Quartz (SiO2)
Chert / Flint
Microcrystalline quartz (SiO2)
Chert Pebble
Chert (SiO2)
Chert (Brown Variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (Beach Pebble)
Silicon Dioxide (SiO2)
Chert (Jasper/Agate)
Silicon Dioxide (SiO2)
Chert
Microcrystalline Quartz (SiO2)
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
Halite
Halite (Sodium Chloride, NaCl)
Dyed Quartz Geode
Silicon Dioxide (SiO2) with artificial pigment
Jasper and Quartz Breccia
Silicified Breccia (SiO2)
Quartzite (or Milky Quartz)
Silicon Dioxide (SiO2)
Limonite Concretion
Goethite/Limonite concretion (FeO(OH)·nH2O)