Carnelian and Dyed Agate
Chalcedony (Silicon Dioxide, SiO2)
mineral
Category
Sedimentary (Base), Then Artificial
Browse sedimentary (base), then artificial specimens identified by the Rock Identifier community.
Learn about Sedimentary (Base), Then Artificial in the encyclopedia
View all →
Dyed blue tumbled stone, likely howlite or magnesite
Howlite (Ca₂B₅SiO₉(OH)₅) or magnesite (MgCO₃), artificially dyed blue
mineral
Peacock ore
Iridescent chalcopyrite, commonly bornite-coated or artificially treated copper sulfide
mineral
Leopard skin jasper (orbicular jasper)
Microcrystalline quartz (SiO₂), commonly with iron-oxide and other silicate inclusions
metamorphic
Likely vertebra fossil or bone fragment
Indeterminate fossilized vertebra; mineralized hydroxyapatite, commonly Ca₅(PO₄)₃(OH)
fossil
Dyed Agate
Silicon Dioxide (SiO2)
mineral
Blue resin-coated or dyed stone cabochon
Likely dyed chalcedony/agate (microcrystalline quartz, SiO₂); exact material is uncertain from the image
mineral
Quartz Geodes and Crystal Clusters
Silicon Dioxide (SiO2)
mineral
Dalmation Stone (Dyed)
Peralkaline rhyolite
igneous
Sandstone (Nut-stone / Cup-stone artifact)
Quartz Arenite / Worked Sedimentary Rock
sedimentary
Pink Anthracite Coal (dyed)
Anthracite Coal (Artificially Colored)
Sedimentary Rock (Altered)
Dyed Blue Agate
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral
Banded Agate (Dyed Purple)
Agate (Variety of Chalcedony/Quartz), SiO2
mineral
Rainbow Hematite (Titanium-Coated Hematite)
Titanium-treated Hematite (Fe2O3)
mineral
Tumbled yellow calcite
Calcite (CaCO₃), likely honey/yellow calcite
mineral
Bismuth
Bismuth (Bi)
mineral
Carnelian
Carnelian (Silicon Dioxide - SiO2 with Hematite impurities)
Mineral
Rounded brown pebble
Indeterminate lithic clast; possibly weathered sandstone or iron-stained quartzite
sedimentary
Weathered concrete or cementitious slab (not natural rock)
Artificial calcium-silicate cement composite; likely Portland cement concrete
sedimentary
Weathered metamorphic rock, likely schist or slate
Foliated pelitic metamorphic rock; commonly muscovite–chlorite schist or phyllite
metamorphic
Sandstone with Quartz Sphere
Arenite (SiO2-rich sedimentary rock) with Quartzite/Rose Quartz sphere
sedimentary
Blue Agate Slice
Chalcedony (SiO2)
gemstone
Yellow Quartz
SiO2 (Silicon Dioxide)
mineral
Basalt (likely vesicular basalt)
Basalt; predominantly plagioclase, clinopyroxene, and olivine, with possible volcanic glass
igneous
Banded Calcite (often sold as 'Mexican Onyx')
Calcite (Calcium Carbonate - CaCO3)
sedimentary
Tumbled jasper or chert
Microcrystalline quartz (SiO₂), likely jasper/chert
mineral
Blue Chalcedony (Agate)
Silicon Dioxide (SiO2)
mineral
Chert with Asphaltum (or Tar)
Silica (SiO2) with natural Bitumen/Asphaltum
sedimentary
Blue Banded Agate (Dyed)
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Dyed Agate Slice
Silicon Dioxide (SiO2)
mineral
Tumbled hematite-rich ironstone
Hematite (Fe₂O₃), likely mixed with magnetite and iron-bearing silicates
mineral
Blue Agate (Dyed Chalcedony)
Silicon Dioxide (SiO2)
sedimentary
Dyed Dalmatian Stone
Aplite (Alkali-feldspar granite) with Arfvedsonite
igneous
Terrazzo (Man-made Composite)
Cementitious or Resin-bound Lithic Composite
sedimentary (artificial)
Green Chalcedony (likely Green Agate or Chrysoprase)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Mineral
Pink Dyed Agate (Pink Agate Slice)
Silicon Dioxide (SiO2) - Chalcedony / Cryptocrystalline Quartz
mineral
Red jasper (tumbled)
Jasper, microcrystalline quartz/chalcedony (SiO₂) colored mainly by iron oxides
mineral
Tumbled carnelian/chalcedony
Carnelian, orange-red microcrystalline quartz (SiO₂), a variety of chalcedony
gemstone
Pink Satin Spar (Satin Spar Selenite Dyed)
Gypsum (CaSO4·2H2O)
mineral
Red Chalcedony (likely dyed)
Chalcedony (a variety of Quartz), SiO2
Mineral (Cryptocrystalline Quartz)
Concrete Paver (Artificial Cementitious Rock)
Hydrated Portland Cement Aggregate
Sedimentary (Synthetic)
Slag (Industrial Byproduct)
Ferrous/Non-ferrous Silicate
igneous (artificial/anthropogenic)