Fluorite (Blue)
Calcium Fluoride (CaF2)
Category
Browse sedimentary (chemically precipitated mineral) specimens identified by the Rock Identifier community.
Fluorite (Blue)
Calcium Fluoride (CaF2)
Red Howlite (Dyed)
Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5) with Red Dye
Bauxite (Aluminum Ore)
Hydrated aluminum oxides, primarily Al(OH)3, AlO(OH)
K2 Jasper
Azurite in Granite
Jasper
Silicon Dioxide (SiO2) with impurities
Quartz Pebble
Silicon Dioxide (SiO2)
Yellow Quartz
Silicon Dioxide (SiO2)
Limonite
Limonite (FeOO·nH2O)
Quartz Geode
Silicon Dioxide (SiO2)
Quartz
SiO2 (Silicon dioxide)
Yellow Calcite
Calcium Carbonate (CaCO3)
Hematite with Magnetite
Iron Oxide (Fe2O3)
Pyrite on Quartz
Iron Sulfide (FeS2) on Silicon Dioxide (SiO2)
Quartz (Clear Quartz/Rock Crystal)
Silicon Dioxide (SiO2)
Quartz (Clear / Rock Crystal)
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Pyrite
Iron Sulfide (FeS2)
Quartz Geode
Silicon Dioxide (SiO2) within Sedimentary host rock
Green Calcite
Calcium Carbonate (CaCO3)
Botryoidal Chalcedony
Silicon Dioxide (SiO2)
Quartz Geode
Silicon Dioxide (SiO2)
Chert nodules in Limestone
Microcrystalline Quartz (SiO2) in Calcium Carbonate (CaCO3) matrix
Chert (Quartz Variety)
Chert (mostly SiO2 / Silicon Dioxide)
Chert / Flint
Microcrystalline Quartz (SiO2)
Ironstone (Limonite/Hematite)
Ferruginous sedimentary rock (Fe2O3·nH2O / Fe2O3)
Fossiliferous Limestone
Calcium Carbonate (CaCO3) with Bioclasts
Chert
Microcrystalline Quartz (SiO2)
Chert (Nodule / Geode fragment)
Microcrystalline Quartz (SiO2)
Quartz Geode (likely within Limestone or Dolomite matrix)
Quartz (SiO₂)
Bauxite
Bauxite (Al2O3·2H2O mixed with iron oxides)
Fossilized Bone (Petrified Bone)
Permineralized Vertebrate Remains
Banded Chert
Microcrystalline Quartz (SiO2)
Limonite (Iron-rich Siltstone / Sandstone base)
Hydrous ferric oxide mixture (FeO(OH)·nH2O)
Clear Quartz
Silicon Dioxide (SiO2)
Quartz (Granular)
Silicon Dioxide (SiO2)
Quartz Druzy on Matrix
Silicon Dioxide (SiO2)
Leopardskin Jasper
Jasper (a variety of microcrystalline Quartz)
Orange Calcite
Calcium Carbonate (CaCO3)
Quartz (Chert/Chalcedony variety)
Silicon Dioxide (SiO2)
Orange Calcite (Cleavage Rhomb)
Calcite (Calcium Carbonate, CaCO3)
Chert Nodule
Microcrystalline Quartz (SiO2)
Chert
Microcrystalline quartz (SiO2)