Anthropogenic Material (Man Made Sedimentary Mimic)

Anthracite Coal

Anthracite (Carbon-based organic sedimentary rock transitioned to metamorphic)

Chert (Jasper-like)

SiO2 (Cryptocrystalline Quartz)

Calcite

Calcite (CaCO3)

Quartz (in a rock matrix)

Quartz (SiO2)

Yellow Jade (often Serpentine or Dolomite)

Primarily Serpentine (Mg3Si2O5(OH)4) or Dolomite (CaMg(CO3)2), though the term 'yellow jade' is also sometimes applied to varieties of true nephrite or jadeite.

Red Jasper

Jasper (a variety of Quartz, SiO2)

Sandstone

Sandstone (arenite is a more specific geological term for a clean sandstone, while wacke refers to a dirty sandstone with significant matrix)

Clear Quartz (Rock Crystal)

Quartz (SiO₂)

Calcite

Calcite (CaCO3)

Quartz (likely a weathered/tumbled piece)

Quartz (SiO₂)

Quartz

Quartz (SiO₂)

Clear Quartz (or Rock Crystal)

Quartz (SiO₂ - Silicon Dioxide)

Chert (Flint)

Chert (predominantly SiO₂ - silicon dioxide)

Quartz (likely Milky Quartz or Chalcedony)

Quartz (SiO2 - Silicon Dioxide)

Quartz (Float/Abraded)

Quartz (SiO₂)

Turquoise

Hydrated phosphate of copper and aluminium - CuAl6(PO4)4(OH)8·4H2O

Quartz (Rock Crystal) with minor impurities

Quartz (SiO2)

Marble

Marbles are primarily composed of calcite (calcium carbonate, CaCO3) or dolomite (calcium magnesium carbonate, CaMg(CO3)2).

Shale

Shale

Chalcedony (Banded/Mottled Variety)

Chalcedony (a cryptocrystalline variety of Quartz, SiO2)

Black Chert

Chert (microcrystalline quartz)

Quartz

Quartz (SiO₂ - Silicon Dioxide)

Jasper

Silicon Dioxide (SiO2) - a variety of Chalcedony (Cryptocrystalline Quartz)

Banded Chert

Chert (a microcrystalline variety of quartz, SiO2 with minor impurities)

Quartz (Milky Quartz)

Quartz (SiO2 - Silicon Dioxide)

Quartz (likely)

Quartz (SiO2 - Silicon Dioxide)

Quartz with Iron Stains

Quartz (SiO2) with iron oxide/hydroxide staining

Quartz

Quartz (SiO₂)

Quartz (possibly milky quartz or quartz with inclusions)

SiO2 (Silicon Dioxide)

Red Jasper

Jasper (a cryptocrystalline variety of Quartz, SiO₂)

Pink Stained Rock (Likely Quartzite or Sandstone with Iron Oxide Staining)

Quartzite (metamorphic) or Sandstone (sedimentary); coloration likely due to hematite or other iron oxides.

Quartzite

Quartzite (primarily SiO2)

Petrified Wood

Silicified Wood (SiO2 - primarily Quartz/Chalcedony/Opal)

Quartz (chalcedony variety) or Limestone with Quartz Veins

SiO2 (for Quartz/Chalcedony); CaCO3 (for Limestone)

Quartz

Quartz (SiO₂)

Quartz (possibly milky quartz)

Quartz (Silica; SiO₂)

Banded Jasper (Chert)

Silicon Dioxide (SiO2) - variety of Chalcedony

Fuchsite Quartzite

Fuchsite-bearing Quartzite

Muscovite Mica

Muscovite (KAl₂(AlSi₃O₁₀)(F,OH)₂))

Mookaite Jasper

Siliceous sedimentary rock (variety of Jasper/Chert)

Quartz

Quartz (Silicon Dioxide - SiO2)

Quartz Geode/Druzy Quartz

Quartz (SiO₂)