Jasper / Chert (Red)
Cryptocrystalline quartz (SiO2)
Sedimentary / Mineral
Category
Anthropogenic Specimen (Man Made Material)
Browse anthropogenic specimen (man made material) specimens identified by the Rock Identifier community.
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Chert (Flint)
Chert (Silicon Dioxide, SiO2)
sedimentary
Chert (Jasper/Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint / Jasper)
Silicon Dioxide (SiO2)
sedimentary
Flint / Chert Pebble
Microcrystalline Quartz (SiO2)
sedimentary
Diamond (as featured in jewelry)
Diamond (C - pure carbon)
mineral
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (often called Flint or River Stone)
Microcrystalline alpha-quartz (SiO2)
sedimentary
Chalcedony (likely blue agate) knapped into an arrowhead
Microcrystalline quartz, SiO₂ (chalcedony)
mineral
Likely flint (chert) fragment
Chert, microcrystalline quartz (SiO₂)
sedimentary
Chert (Jasper/Flint var.)
Silicon Dioxide (SiO2)
sedimentary
Chert (Chert / Flint Variety)
Microcrystalline / Cryptocrystalline Quartz (SiO2)
sedimentary
Colorless faceted gemstone, likely glass or cubic zirconia
Uncertain; possible cubic zirconia (ZrO₂) or quartz (SiO₂), but the image may show a man-made simulant
gemstone
Paper (Cellulose)
Cellulose (C6H10O5)n
Organic (Anthropogenic)
Asphalt aggregate (crushed stone in bitumen)
Artificial composite; predominantly crushed granite, basalt, limestone, and/or recycled aggregate bound by bitumen
sedimentary
Polished brown chalcedony (likely carnelian or jasper)
Microcrystalline quartz, SiO₂; iron oxides produce the brown coloration
mineral
Diamond Druzy (Crystalline Diamond)
Carbon (C)
mineral
Chert Arrowhead
Cryptocrystalline microcrystalline Quartz (SiO2)
sedimentary
Chert (flint) fragment
Microcrystalline quartz (SiO₂), commonly called chert or flint
sedimentary
Polished black stone carving, likely soapstone/steatite
Steatite (massive talc), Mg₃Si₄O₁₀(OH)₂; exact material cannot be confirmed from the image
metamorphic
Onyx (Black) and Mother of Pearl Inlay
Silicon Dioxide (SiO2) for Onyx; Aragonite (CaCO3) for Mother of Pearl
mineral
Sea Glass (Teal/Turquoise)
Amorphous Silica (SiO2) with trace metal oxides
Anthropogenic (Man-made material processed by nature)
Diamond ring
Diamond, crystalline carbon (C)
gemstone
Iron Slag
Anthropogenic Vitreous Silicate (Byproduct of Smelting)
Mineral-like byproduct
Iron-rich banded quartzite / jaspilite
Banded iron formation (BIF), chiefly quartz (SiO₂) and iron oxides (hematite, Fe₂O₃; magnetite, Fe₃O₄)
metamorphic
Chert (Cherty Shale / Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Chert / Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (varieties include Flint and Jasper)
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Rounded gray pebble, likely quartzite
Quartzite (predominantly crystalline quartz, SiO₂); identification is tentative from the image
metamorphic
Chert (Nodule)
Microcrystalline Quartz (SiO2)
sedimentary
Milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Mica Schist
Mica Schist (principally Biotite/Muscovite, Quartz, and Feldspar)
metamorphic
Banded agate pendant (likely carnelian or brown-and-white chalcedony agate)
Agate, a banded variety of chalcedony; microcrystalline quartz, SiO₂, with iron-oxide coloration
gemstone
Polished stone sphere, possibly agate or jasper
Likely microcrystalline quartz (SiO₂); exact variety cannot be confirmed from the image
mineral
White drusy quartz
Quartz, silicon dioxide (SiO₂), with a drusy coating of tiny crystals
mineral
Chert (often called Flint in archaeological contexts)
Silicon Dioxide (SiO2)
sedimentary
Rough Diamond
Pure Carbon (C)
mineral
Chert (specifically Flint)
Chert (SiO2)
sedimentary
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Red agate bead (likely dyed or treated)
Agate, a microcrystalline variety of quartz; SiO₂
gemstone
US Penny
Cuprum (Copper: Cu) and Zincum (Zinc: Zn) Alloy
Man-made object (metal alloy)