Sedimentary (Man Made)

Orange Calcite

Calcite (Calcium Carbonate - CaCO3)

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz Veined Rock (Likely Graywacke or Quartzite)

Silicon Dioxide (SiO2) veins in Metasedimentary matrix

Red Jasper

Silicon Dioxide (SiO2) with Hematite impurities

Shiva Lingam

Cryptocrystalline Quartz (Jasperiod Silicate with Iron Oxide inclusions)

Hematite

Iron(III) oxide (Fe2O3)

Yellow Quartz (Citrine/Yellow Jasper mix)

Silicon Dioxide (SiO2)

Marble

Metamorphosed Limestone (calcite formulation CaCO3)

Chert / Flint (with quartz or calcite inclusion)

Silicon dioxide (SiO2)

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Chert (and/or Flint)

Silicon Dioxide (SiO2)

Chert (Tan/Buff Chert)

Microcrystalline Quartz (SiO2)

Sandstone

Arenite (SiO2 based)

Chert (often called Flint in this variation)

Silicon dioxide (SiO2) - Microcrystalline quartz

Chert (often called Flint when dark)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Fossiliferous Limestone (Coquina / Shell Limestone)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Sandstone (Ferruginous)

Arenite (primarily SiO2 with iron oxide staining/cementing)

Chert (often called Flint or Jasper)

Microcrystalline or Cryptocrystalline Silicon Dioxide (SiO2)

Chert (Flint variety)

Silicon Dioxide (SiO2)

Bauxite

Bauxite (Al(OH)3 mixed with Fe2O3 and clay minerals)

Sandstone

Arenite (primarily SiO2)

Chert (Flint)

Chert (Silicon Dioxide, SiO2)

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Sandstone (with Iron Oxide)

Arenite with Limonite/Hematite staining

Chert (Iron-rich)

Silicon Dioxide (SiO2) with Hematite (Fe2O3)

Fossiliferous Limestone (with Crinoids)

CaCO3 (Calcium Carbonate)

Fossiliferous Limestone (Coquina)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Coquina or Fossiliferous Limestone

Fossiliferous Calcarenite (CaCO3)

Red Sandstone

Arenite (with Iron Oxide pigmentation)

Quartz River Cobble

Silicon Dioxide (SiO2)

Chert (Nodule)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Chert (variations include Flint/Jasper)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Moqui Marble (Shaman Stone)

Ironstone Concretion (Fe2O3 with a sandstone core)

Sandstone (Wonderstone)

Silicified Sandstone / Orthoquartzite with Liesegang rings

River Stone (Chert/Siltstone)

Cryptocrystalline Quartz (SiO2) with trace impurities

Chert (Lake Superior Agate variant)

Microcrystalline Quartz (SiO2)

Chert (often called Flint for dark varieties)

Chert (SiO2)

Red Sandstone

Arenite (primarily Quartz with Hematite cement)

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Red Jasper (River Siltstone)

Silicon Dioxide (SiO2) with iron oxide inclusions

Travertine (Calcareous Tufa)

Calcium Carbonate (CaCO3)

Chert (Flint)

Chert (Cryptocrystalline variety of Quartz, SiO2)