Drill Core Sample
Cylindrical Rock Core (Specific mineralogy varies by extraction site)
Metamorphic (Likely Gneiss or Schist based on texture)
Category
Sedimentary (Primary) With Artificial Modification
Browse sedimentary (primary) with artificial modification specimens identified by the Rock Identifier community.
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Prasiolite
Silicon Dioxide (SiO2) with iron impurities
mineral
Chert (often called Flint)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Rainbow Hematite (Titanium-Coated Hematite)
Titanium-treated Hematite (Fe2O3)
mineral
Grooved Maun Ball (Maul/Hammerstone-like Concretion)
Calcareous/Ferruginous Concretion in Sandstone Matrix
sedimentary
Olivine (Peridot)
Magnesium Iron Silicate (Mg,Fe)2SiO4
mineral
Dyed Agate
Cryptocrystalline variety of Silica (SiO2)
gemstone
Ferrous Slag
Fused calcium-iron silicates (Industrial Slag)
Anthropogenic/Industrial byproduct
Concrete
Anthropogenic Sedimentary Conglomerate (Cement mixture: typically Ca2SiO4, Ca3SiO5, Ca3Al2O6)
sedimentary (artificial)
Metallic Ornament / Jewelry
N/A - This is an artificial object, not a geological specimen.
This appears to be a man-made metallic object, likely jewelry, not a natural rock, mineral, or geological specimen.
Painted Garden Rock
Coated Siltstone or Mudstone
sedimentary
Dyed Chalcedony (Agate)
Silicon Dioxide (SiO2)
mineral
Peridot (Olivine)
Magnesium Iron Silicate (Mg,Fe)2SiO4
mineral
Quartz Pebble (Chalcedony / Agate)
Silicon Dioxide (SiO2)
sedimentary
Asphalt Conglomerate
Artificial Bituminous Conglomerate
sedimentary
Bornite (Peacock Ore)
Bornite (Cu5FeS4)
mineral
Basalt
Basalt (Mafic volcanic rock)
igneous
Pet Rock (Quartzite/Sandstone River Rock)
Silicon Dioxide (SiO2) mixture
sedimentary
Sandstone with Liesegang Rings
Quartzose Sandstone with Iron Oxide Precipitation
sedimentary
Peacock Ore
Bornite (Cu5FeS4)
mineral
Dyed Blue Agate Geode Slice
Chalcedony (Silicon Dioxide, SiO2)
mineral
Likely chalcopyrite-bearing sulfide ore
Chalcopyrite (CuFeS₂), possibly with pyrite and/or sphalerite
mineral
Dyed Quartz Geode
Silicon Dioxide (SiO2) with artificial pigment
mineral
Dyed Agate
Silicon Dioxide (SiO2)
mineral
Dyed Crackle Quartz/Agate (resembling Watermelon Tourmaline)
SiO2 (Silicon Dioxide)
Mineral/Treated
Blue Dyed Agate
Chalcedony (Silicon Dioxide, SiO2)
mineral
Asphalt
Asphalt concrete
sedimentary
Blue Agate (Dyed)
Silicon Dioxide (SiO2)
mineral
Trilobite Fossil (Flexicalymene)
Flexicalymene ouzregui
sedimentary
Blue Howlite (Dyed)
Dyed Howlite (Calcium Borosilicate Hydroxide, Ca2B5SiO9(OH)5)
mineral
Dyed Agate
Silicon Dioxide (SiO2) - Chalcedony variety
sedimentary
Sphalerite in Matrix (Polished Point)
Zinc sulfide (Zn,Fe)S
mineral
Dyed Agate (Tumbled)
Silicon Dioxide (SiO2) - stained microcrystalline quartz
sedimentary
Peacock Ore (Treated Chalcopyrite)
Copper Iron Sulfide (CuFeS2) coated with oxides
mineral
Dyed Agate
Chalcedony (Silicon Dioxide, SiO2)
mineral
Dyed Quartz Geode
Silicon Dioxide (SiO2) with artificial pigment
mineral
Glass
Amorphous Silicon Dioxide (SiO2)
mineraloid
Dyed Blue Agate
Silicon dioxide (SiO2) with artificial pigment
mineral
Dyed Agate
SiO2
mineral
Dyed Quartz Geode
Silicon Dioxide (SiO2) with artificial pigment
mineral
Asphalt Chunk (Bituminous Concrete)
Aggregated Bitumen / Artificial Breccia
sedimentary
Small rounded pebble, likely weathered sandstone or iron-stained sedimentary rock
Indeterminate; probable quartz-rich sandstone (SiO₂ with clay/iron-oxide cement)
sedimentary