Cubic Zirconia (CZ)
Cubic Zirconium Dioxide (ZrO2)
mineral (synthetic)
Category
Anthropogenic Specimen (Man Made)
Browse anthropogenic specimen (man made) specimens identified by the Rock Identifier community.
Chert (and Flint variant)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Sandstone (with Lichen)
Arenite (composed primarily of SiO2)
sedimentary
Quartzite with vugs/druzy quartz
Crystalline Silicon Dioxide (SiO2)
metamorphic
Rose Quartz (likely carved)
Rose Quartz (SiO2)
Mineral
Rose Quartz Carving
Quartum roseum (Variety of Quartz, SiO2)
Mineral
Chert (Iron-stained)
Microcrystalline Quartz (SiO2)
sedimentary
Green Onyx (Banded Calcite)
Banded Calcite / Aragonite (CaCO3)
mineral
Chert (Arrowhead Artifact)
Chert (SiO2)
sedimentary
Black Tourmaline in Quartz Matrix
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4) with Quartz (SiO2)
mineral
River Pebble (Siltstone/Mudstone)
Clastic sedimentary rock
sedimentary
Banded Agate (Carnelian type)
Agate (Cryptocrystalline Quartz, SiO2)
mineral
Quartz Geode / Druzy Quartz
Silicon Dioxide (SiO2)
mineral
Calcite on Limestone (or Fossil)
Calcium Carbonate (CaCO3)
sedimentary
Chert (Agatized Chert)
Microcrystalline Quartz (SiO2)
sedimentary
Quartzite (River Pebble)
Meta-quartzite (composed primarily of SiO2)
metamorphic
Quartz (Milky/Smoky variety)
Silicon Dioxide (SiO2)
mineral
Schist with Biotite and Quartz
Biotite-Quartz Schist (Fe,Mg,Al silicate mix)
metamorphic
Fossil Shark Tooth (Cretaceous white shark type)
Squalicorax (commonly known as Crow Shark)
Organic specimen (fossil)
Granite Cobble
Granite
igneous
Basalt (with Plagioclase Phenocrysts)
Porphyritic Basalt
igneous
Granite with Orthoclase and Hematite Staining
Phaneritic Felsic Igneous Rock (primarily SiO2 with KAlSi3O8)
igneous
Fossiliferous Limestone
Biogenic Calcium Carbonate (CaCO3)
sedimentary
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Basalt (River Rock pebble)
Basalt (a mafic extrusive igneous rock)
igneous
Basalt with Secondary Mineralization (Likely Zeolites or Calcite)
Aphanitic mafic volcanic rock with secondary mineral inclusions (e.g., CaAl2Si3O10·3H2O for Scolecite)
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Anthracite Coal
Anthracite
sedimentary
Quartz in Matrix (possibly with Biotite or Hornblende)
Quartz (Silicon Dioxide, SiO2) in Granitic Matrix
igneous
Dalmatian Stone (commonly Dyed)
Dalmatian Jasper (Peralkaline igneous rock)
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Kyanite in Quartz
Al2SiO5 in SiO2
metamorphic
Quartz with Mica Schist (Pegmatite Specimen)
SiO2 (Silicon Dioxide) and Phyllosilicates (Biotite/Muscovite)
Igneous/Metamorphic Hybrid
Jasper (Petrified Wood variant)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Gray variety)
Silicon Dioxide (SiO2)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Chert (Common Opal/Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Copper Ore with Malachite and Chrysocolla
Cu2CO3(OH)2 (Malachite) with Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Chrysocolla)
mineral
Blue Lace Agate (often dyed)
Silicon dioxide (SiO2) - variety of chalcedony
mineral
Agate (Chert/Chalcedony)
Silicon Dioxide (SiO2)
mineral
Chert (specifically Flint or Common Chert)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary