Shale
Fissile mudstone (primarily clay minerals and silt-sized quartz)
sedimentary
Category
Sedimentary (Anthropogenic)
Browse sedimentary (anthropogenic) specimens identified by the Rock Identifier community.
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Howlite
Ca2B5SiO9(OH)5
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Blue Celestite
Celestine (SrSO4)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Jasper (Brown Jasper)
Microcrystalline Quartz (Chalcedony), SiO2
sedimentary
Agate
Silicon Dioxide (Chalcedony variety), SiO2
gemstone
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Rhodochrosite
Manganese Carbonate (MnCO3)
mineral
Brown Jasper / Chert
Microcrystalline Quartz (SiO2)
sedimentary
Carnelian / Agate
Silicon Dioxide (SiO2) - Chalcedony variety
mineral
Carnelian (Chalcedony)
Silicon Dioxide (SiO2)
mineral
Pyrite in Matrix (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Chalcedony (Carnelian / Agate)
Silicon Dioxide (SiO2)
mineral
Polished Tumbled Stone (Dark Chalcedony / Jasper)
Silicon Dioxide (SiO2)
mineral
Quartz (Pebble)
Silicon Dioxide (SiO2)
mineral
Bloodstone (Heliotrope)
SiO2 (Cryptocrystalline Quartz / Chalcedony)
mineral
Quartz Crystal Rock
Silicon Dioxide (SiO2)
mineral
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Quartz Crystal Cluster
Silicon Dioxide (SiO2)
mineral
Yellow Calcite
Calcium Carbonate, CaCO3
mineral
Agate
Silicon dioxide (Chalcedony), SiO2
sedimentary
Blue Chalcedony
Silicon Dioxide (SiO2)
mineral
Celestite
Celestine (SrSO4)
mineral
Chalcopyrite
Copper iron sulfide (CuFeS2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Jasper with Purple Fluorite or Chalcedony
Silicon Dioxide (SiO2) with mineral inclusions
sedimentary
Limonite Geode / Ironstone Nodule
Hydrated Iron Oxide Hydroxide (FeO(OH)·nH2O)
mineral
Clear Quartz (Faceted)
SiO2 - Silicon Dioxide
gemstone
Satin Spar (often sold as Selenite)
Gypsum (Calcium Sulfate Dihydrate, CaSO4·2H2O)
mineral
Halite
Halite (Sodium Chloride, NaCl)
mineral
Satin Spar Selenite
Gypsum (CaSO4·2H2O)
mineral
Faceted Clear Quartz or Diamond Simulant
Silicon Dioxide (SiO2) if Quartz or Cubic Zirconia (ZrO2) if Synthetic
gemstone
Celestite (Blue Celestine)
Celestine (Strontium Sulfate, SrSO4)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Yellow Ochre (Limonite)
Limonite (FeO(OH)·nH2O)
mineral
Jasper Pendant
Chalcedony (Quartz) - SiO2
Mineral/Sedimentary
Galena
Lead(II) sulfide (PbS)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Blue Chalcedony
Silicon Dioxide (SiO2)
mineral
Botryoidal Chalcedony
Silicon Dioxide (SiO2)
mineral
Blue Kyanite
Kyanite (Al2SiO5)
metamorphic