Chalcopyrite
Copper iron sulfide (CuFeS2)
mineral
Category
Sedimentary (Fossiliferous)
Browse sedimentary (fossiliferous) specimens identified by the Rock Identifier community.
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Milky Quartz
Silicon Dioxide (SiO2)
mineral
Jasper with Purple Fluorite or Chalcedony
Silicon Dioxide (SiO2) with mineral inclusions
sedimentary
Quartz Crystal Cluster
Silicon Dioxide (SiO2)
mineral
Limonite Geode / Ironstone Nodule
Hydrated Iron Oxide Hydroxide (FeO(OH)·nH2O)
mineral
Agate
Silicon dioxide (Chalcedony), SiO2
sedimentary
Howlite
Ca2B5SiO9(OH)5
mineral
Blue Celestite
Celestine (SrSO4)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Yellow Calcite
Calcium Carbonate, CaCO3
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
Polished Tumbled Stone (Dark Chalcedony / Jasper)
Silicon Dioxide (SiO2)
mineral
Quartz (Pebble)
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Faceted)
SiO2 - Silicon Dioxide
gemstone
Bloodstone (Heliotrope)
SiO2 (Cryptocrystalline Quartz / Chalcedony)
mineral
Pyrite in Matrix (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Chalcedony (Carnelian / Agate)
Silicon Dioxide (SiO2)
mineral
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
Pyrite
Iron Disulfide (FeS2)
mineral
Jasper Pendant
Chalcedony (Quartz) - SiO2
Mineral/Sedimentary
Blue Chalcedony
Silicon Dioxide (SiO2)
mineral
Galena
Lead(II) sulfide (PbS)
mineral
Botryoidal Chalcedony
Silicon Dioxide (SiO2)
mineral
Blue Kyanite
Kyanite (Al2SiO5)
metamorphic
Greywacke (likely)
Greywacke (a type of sandstone)
Sedimentary
Gypsum (Desert Rose or Selenite variety)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
mineral
Weathered schist or phyllite
Mica schist/phyllite, likely quartz–mica-rich metamorphic rock
metamorphic
Polished orbicular stone, likely granite or diorite
Granite–diorite, composed mainly of feldspar, quartz, and dark amphibole/biotite
igneous
Greenstone
Metabasalt
metamorphic