Organic (If Resin) Or Synthetic (If Glass); Simulating Sedimentary Or Metamorphic (For Natural Stones)

Pyrite

Iron Sulfide (FeS2)

Milky Quartz (Water-worn Pebble)

Quartz (Silicon Dioxide) - SiO2

Red Jasper

Jasper (SiO2) - Silicon Dioxide with Hematic impurities

Wishing Stone (Gneiss or Basalt with Quartz Vein)

Gneiss or Metabasalt (with a Quartz or Calcite intrusion)

Aragonite Star Cluster (or Aragonite Sputnik)

Aragonite (Orthorhombic Calcium Carbonate, CaCO3)

River Jasper (Chert/Chalcedony mix)

Silicon Dioxide (SiO2) with iron oxide and chlorite inclusions

Banded Chert or Agate

Silicon Dioxide (SiO2)

Jasper with Quartz inclusion

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Pyrite

Iron Sulfide (FeS2)

Dragon Stone

Ohko Stone (Argillaceous sedimentary rock)

Sandstone Concretion

Sandstone (Sedimentary Rock) with silica or calcite cement

Sandstone (Quartzose Sandstone)

Arenite (primarily SiO2)

Sandstone (River Pebble)

Arenite (SiO2 based)

Sandstone (Banded)

Clastic Sedimentary Rock (primarily SiO2)

Wishing Stone (Sandstone with Quartz Vein)

Arenite with Quartzite intrusion (SiO₂)

Chert (Black Chert/Flint)

Silicon Dioxide (SiO2)

Sulfur (in host rock)

Native Sulfur (S8)

Yellow Quartz (Chalcedony/Agate)

Silicon Dioxide (SiO2)

Shale or Siltstone

Sedimentary Clastic Rock (Variable mineral composition including quartz and clay minerals)

Wishing Stone (Basalt/Greywacke with Quartz Vein)

Basalt or Siltstone with SiO2 (Quartz) hydrothermal intrusion

Hag Stone (Piddock bored rock)

Calcareous sedimentary rock featuring Pholadidae borings

Sandy Ironstone

Ferruginous Sandstone

Sandstone (Quartzite-rich Cobble)

Clastic sedimentary rock (primarily SiO2)

Quartzite Cobble

Quartzite (primarily SiO2)

Pink Chalcedony (Agate/Jasper blend)

Silicon Dioxide (SiO₂)

Limonite Concretion

Goethite-rich Concretion (FeO(OH))

Amber

Fossilized Tree Resin (Generic formula: C10H16O)

Conglomerate

Conglomerate (clastic sedimentary rock)

Sandstone with Magnetite and Iron Staining

Clastic Sedimentary Rock (contains Fe3O4 and Limonite/Hematite)

Smoky Quartz (with Druzy/Polished Edge)

Smoky Quartz (Silicon Dioxide, SiO2)

Siltstone

Siltstone (primarily SiO2, Al2O3)

Quartzite Pebble (River Rock)

Metamorphic Quartzite (predominantly SiO2)

Quartzite Pebble

Quartzite (primarily SiO2)

Chert (Jasper nodule)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Cubic Zirconia

Cubic Zirconium Dioxide (ZrO2)

Basalt with Quartz Veins

Vesicular or aphanitic Basalt with SiO2 (Quartz) intrusions

Fossilized Gastropod (Snail)

Class Gastropoda (internal mold or 'steinkern')

Chert (Iron-stained)

Chert (Microcrystalline and Cryptocrystalline Quartz, SiO2)

Red Jasper

Jasper (Silicon Dioxide, SiO2)

Quartzite with Hematite staining

Quartzite (SiO2) with iron oxide inclusions

Quartzite Pebbles

Quartzite (SiO2)

Sandstone (likely Arkose or Quartz Sandstone)

Arenite (SiO2 + varied clasts)