Jasper (Mookaite style)
Silicon Dioxide (SiO2) with iron and manganese inclusions
sedimentary
Category
Man Made Composite (Lithified Equivalent Of Sedimentary)
Browse man made composite (lithified equivalent of sedimentary) specimens identified by the Rock Identifier community.
Quartz (Druzy Quartz)
Silicon Dioxide (SiO2)
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Chert (variations include Flint/Jasper)
Cryptocrystalline Silicon Dioxide (SiO2)
sedimentary
Red Jasper
Jasper (Silicon Dioxide: SiO2 with Iron oxide inclusions)
sedimentary
Coquina / Shelly Limestone
Bioclastic Limestone (composed of CaCO3)
sedimentary
Chalcedony or Chert/Jasper with secondary mineral staining
SiO2 (for chalcedony/quartz) with possible secondary copper minerals (e.g., CuSiO3·nH2O for chrysocolla, Cu2(CO3)(OH)2 for malachite) or iron oxides/hydroxides.
Mineral, potentially a rock with chalcedony/jasper.
Fossiliferous Limestone
Calcium Carbonate (CaCO3) with Bioclastic Inclusions
sedimentary
Chert (Jasper or Flint variant)
Chert (composed of microcrystalline quartz, SiO2)
sedimentary
Banded Agate (specifically Moss Agate or Plume Agate variety)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Coal (Anthracite)
Anthracite (Carbon-based organic sedimentary/metamorphic rock)
metamorphic
Petrified Wood
Silicified Wood (primarily Quartz / Chalcedony: SiO2)
metamorphic
Orange Satin Spar (Satin Spar Selenite)
Satin Spar - Hydrous Calcium Sulfate (CaSO4·2H2O)
mineral
Granite
Granite (Felsic intrusive igneous rock)
igneous
Red Sandstone
Arenite (primarily Quartz and Feldspar with Iron Oxide cement)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with goethite or iron oxide inclusions
sedimentary
Milky Quartz
Quartz (Silica / Silicon Dioxide), SiO2
mineral
Iron Meteorite
Iron-nickel alloy (primarily kamacite and taenite)
Mineral/Rock (Extraterrestrial Origin)
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Anthracite Coal
High-rank coal (primarily Carbon, C)
metamorphic
Red Jasper
Jasper (a variety of Chalcedony, SiO₂)
Mineraloid (cryptocrystalline quartz)
Quartz (Clear Quartz/Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Bumblebee Jasper
Calcite with Arsenic and Manganese oxides (technically a volcanic rock)
igneous
Dendritic Opal (Common Opal)
Amorphous Hydrated Silica (SiO2·nH2O) with Manganese or Iron Oxide inclusions
mineral
Celestite (Celestine)
Strontium sulfate (SrSO4)
mineral
Jasper
Jasper (Silica/Silicon Dioxide, SiO2)
sedimentary
Grooved Maun Ball (Maul/Hammerstone-like Concretion)
Calcareous/Ferruginous Concretion in Sandstone Matrix
sedimentary
Limestone (Cliff Formation)
Limestone (predominantly CaCO3 as calcite)
Sedimentary
Carnelian
Carnelian (a variety of Chalcedony, SiO2)
Mineral
Granite
Granite (Phaneritic Quartz-Feldspar Felsic Rock)
igneous
Quartz
Quartz (SiO2)
Mineral
Zebra Jasper
Silicon Dioxide (SiO2) - Macro-crystalline Quartz/Chert with impurities
sedimentary
Engineer Quartz/Quartzite
SiO2 (Silicon Dioxide with binders)
Sedimentary or metamorphic-derived
Chert (Brown Variety)
Silicon dioxide (SiO2)
sedimentary
Gold
Native Gold (Au)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
Mineral / Sedimentary occurrence
Quartz / Chert
Silicon Dioxide (SiO2)
Mineral / Sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz
Silicon Dioxide (SiO₂)
Mineral
Mixed Quartz and River Pebbles (Stone Collection)
Mixed assortment containing mainly Silicon Dioxide (SiO2)
igneous, sedimentary, metamorphic, and mineral
Chrysoprase
Chrysoprase (a variety of Chalcedony, SiO₂)
Mineral