Man Made Rock Like Material

Chert / Jasper

Silicon Dioxide (SiO₂)

Desert Rose (Baryte or Gypsum Rose)

Baryte (BaSO4) or Gypsum (CaSO4·2H2O)

Chert (Nodule)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Sandstone

Sedimentary Clastic Rock (Quartzose Sandstone)

Fossilized Shark Tooth (Eroded)

Carcharodon sp. or Otodus sp. fragment (likely)

Amethyst crystal fragment

Quartz, silicon dioxide (SiO₂), purple variety colored mainly by iron and irradiation

Chert (Flint)

Chert (SiO2)

Siltstone Pebble

Siltstone (composed of microscopic quartz and clay minerals)

Granodiorite

Granodiorite

Asphalt (Bituminous Concrete)

Composite material (bitumen binder with mineral aggregate)

Dyed Crackle Quartz

Silicon Dioxide (SiO2) with synthetic dye

Chert (Flint)

Silicon Dioxide (SiO2)

Granite

Granitoid (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8 + SiO2)

Turquoise cabochon ring

Turquoise — hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O

Flint (chert), likely a worked stone flake

Microcrystalline quartz (SiO₂); cryptocrystalline variety of quartz

Faience and Carnelian in Egyptian Revival Jewelry

Faience (quartz frit) and Carnelian (chalcedony, SiO2)

Goldstone

N/A (Synthetic Glass with Copper Inclusions)

Likely tumbled epidote-bearing rock or green jasper

Epidote-group silicate, possibly in a jasper or serpentinite matrix

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Green Glass Cullet / Recycled Glass

Amorphous Silicon Dioxide (SiO2) with various metal oxides

Slate

Metamorphic pelitic rock

Asphalt aggregate

Human-made bituminous asphalt containing crushed silicate rock aggregate

Bituminous Coal (with Anthracite or Vitrinite inclusion)

Organic-rich Sedimentary Rock (Carboniferous classification)

Chert (and/or Flint)

Microcrystalline Quartz (SiO2)

Dyed Dragon Vein Agate

Silicon Dioxide (SiO2) with artificial pigment

Green Quartzite

Metamorphic Quartzite (often colored by chromium-bearing minerals or fuchsite)

Green-and-white terrazzo (likely serpentine/marble aggregate)

Composite decorative stone; probable serpentinite (Mg₃Si₂O₅(OH)₄) with white calcite marble fragments in cementitious matrix

Paving-concrete aggregate with a rounded stone

Polymictic gravel aggregate; the central clast appears to be weathered sandstone or volcanic rock

Chert (possibly a worked stone flake)

Microcrystalline quartz, SiO₂

Crinoid Fossil in Limestone

Crinoid columnal (Class Crinoidea) in biomicrite

Chert (Nodule)

Microcrystalline Quartz (SiO2)

Chert (Flint)

Microcrystalline Quartz (SiO2)

Clay (as a rock-forming material)

Clay minerals (e.g., Kaolinite group, Smectite group, Illite group, Chlorite group)

Pink Granite

Phaneritic Felsic Intrusive Igneous Rock

Pink Granite

Intrusive Igneous Rock (high K-feldspar content)

Pink Granite

Phaneritic Felsic Intrusive Igneous Rock

Carnelian cabochon pendant

Carnelian, orange-red chalcedony (microcrystalline quartz, SiO₂)

Red jasper (likely)

Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored by iron oxides

Granite

Granite (Plutonic Igneous Rock)

Goldstone (Synthetic Aventurescence Glass)

Cuprous Aventurescent Glass (Silicon Dioxide with Copper inclusions)

Tumbled aqua glassy mineral specimen, likely chrysocolla or turquoise imitation

Uncertain from image; possible chrysocolla (hydrated copper aluminosilicate, variable composition) or dyed/man-made glass

Sandstone (Pebble)

Arenite