Moss-covered Limestone with Quartz/Calcite Pocket
Calcium Carbonate (CaCO3) rock with biological moss coating
sedimentary
Category
Sedimentary (If Natural Jasper) Or Artificial (If Slag)
Browse sedimentary (if natural jasper) or artificial (if slag) specimens identified by the Rock Identifier community.
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Red Jasper
Microcrystalline Quartz (SiO2 with Iron Oxide impurities)
sedimentary
Puddingstone (Jasper-Conglomerate)
Jasper Conglomerate (SiO2 matrix with Jasper clasts)
sedimentary
Likely weathered river pebble
Indeterminate lithology; possibly fine-grained sandstone, siltstone, or chert
sedimentary
Banded Sedimentary Rock
Stratified Siliciclastic / Arenite or Siltstone with Mineral Bands
sedimentary
River Pebble
Quartzite / Lithic Sandstone
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Black Onyx
Silicon Dioxide (SiO2) - Chalcedony
gemstone
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
sedimentary
Mixed River Pebbles (including Unakite and Jasper)
Polymineralic geological specimens
igneous and sedimentary
Mixed Gemstones and Minerals
Mixed Silicates and Oxides (Quartz/Amethyst, Aventurine, Sodalite, Chert, Jasper)
mineral
Sandstone
Arenite (SiO2 based)
sedimentary
Quartzite Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Jasper containing fossilized inclusions
Silicon Dioxide (SiO2) with trace impurities and biogenic inclusions
sedimentary
Shale
Shale (Argillaceous sedimentary rock)
sedimentary
Dragon Vein Agate
Chalcedony (cryptocrystalline Quartz), SiO2
mineral
Halite (Rock Salt)
Halite (Sodium Chloride, NaCl)
mineral
Shark Tooth Fossil
Vertebrate fossilized tooth
fossil
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Chert Breccia
Brecciated Chert (Sedimentary Rock)
sedimentary
Shale
Laminated Mudstone (Shale)
sedimentary
Fossiliferous Mudstone / River Pebble
Sedimentary rock with trace fossil or inclusion
sedimentary
Jasper (Banded Jasper / Chert)
Silicon Dioxide (SiO2 with iron oxide inclusions)
sedimentary
Sandstone (Grooved/Weathered)
Arenite (composed primarily of Quartz and Lithic fragments)
sedimentary
Jasper-Agate
Silicon Dioxide (SiO2)
sedimentary
Jasper Pebble
Microcrystalline Quartz (SiO2)
sedimentary
Jasper and Chalcedony
Silicon Dioxide (SiO2) microcrystalline quartz
sedimentary
Shale
Fissile Siliciclastic Sedimentary Rock
sedimentary
Dalmatian Jasper (Dalmatian Stone)
Dalmatian Stone (primarily Feldspar, Quartz, and Arfvedsonite/Tourmaline)
igneous
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Sandstone
Arenite (SiO2 principal)
sedimentary
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary (microcrystalline quartz)
Weathered iron-rich sandstone or ferruginous siltstone
Clastic sedimentary rock, likely quartz-rich sandstone cemented by iron oxides (Fe₂O₃/Fe₃O₄)
sedimentary
Banded Jasper (Mookaite / Chert)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Herkimer Diamond (Quartz)
Silicon Dioxide (SiO2)
mineral
Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
sedimentary
Leopard Skin Jasper or Ring Jasper
Microcrystalline Quartz (Chalcedony with impurities)
sedimentary
Gneiss (Banded Gneiss Cobble)
Gneiss
metamorphic
Polished Ocean Jasper (orbicular jasper)
Siliceous microcrystalline quartz/chalcedony, mainly SiO₂, with iron- and manganese-rich inclusions
sedimentary
Satin Spar (Gypsum)
Gypsum (Satin Spar variety) - CaSO4·2H2O
mineral
Agate (Carnelian / Chalcedony pebble)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral