Mineral (Synthetic Paper And Ink Polymorph)

Banded Iron Formation (BIF) / Jaspilite

Banded Iron Formation (predominantly Hematite, Magnetite, and Quartz/Jasper)

Tumbled agate (likely Botswana or fortification agate)

Microcrystalline quartz, SiO₂ (chalcedony with banded impurities)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Amber

Succinite (with approximate formula C10H16O)

Petoskey Stone

Hexagonaria percarinata (Silicified/Calcitic)

Banded Agate

Cryptocrystalline Quartz (SiO2)

Diorite

Phaneritic intermediate plutonic rock

Polished agate geode

Chalcedony (microcrystalline quartz, SiO₂) with quartz druse crystals

Dark river pebble, likely basalt or fine-grained volcanic rock

Basalt (probable); mostly plagioclase and pyroxene, with possible magnetite

Dyed Quartz Geode

Silicon Dioxide (SiO2) with artificial pigment

Painted Sandstone Cobble

Clastic Sedimentary Rock (Sandstone base)

Banded Sandstone (Zebra Stone)

Arenite with Iron Oxide Banding (Liesegang rings)

Petrified Wood

Silicified Wood (SiO2)

Bauxite

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

Faceted blue gemstone, likely blue topaz or synthetic spinel

Topaz (Al₂SiO₄(F,OH)₂) or synthetic spinel (MgAl₂O₄); image insufficient for certainty

Tumbled orbicular granite or granitic gneiss

Granite, chiefly quartz–feldspar–biotite/amphibole; exact variety uncertain from the image

Jasper (specifically Owyhee or Picture Jasper variety)

Jasper (Silicon Dioxide, SiO2)

Polished orbicular stone, likely granite or diorite

Granite–diorite, composed mainly of feldspar, quartz, and dark amphibole/biotite

Faceted Clear Quartz or Diamond Simulant

Silicon Dioxide (SiO2) if Quartz or Cubic Zirconia (ZrO2) if Synthetic

Sandstone with Quartz Vein

Arenite with Quartz (SiO2) Infilling

Opalite

Man-made Glass (SiO2 + additives)

Sandstone (Wonderstone)

Arenite (composed primarily of SiO2 with Fe2O3 impurities)

Petoskey Stone

Hexagonaria percarinata (Fossilized Rugose Coral)

Opalite

Synthetic glass / Opalized glass

Opalite

Synthetic Opalised Glass

Agate

Silicon Dioxide (SiO2)

Orange cabochon gemstone, likely amber or amber-like resin

Natural amber: fossilized plant resin (organic mineraloid), commonly succinite; exact identification requires testing

Amber

Succinite (fossilized resin); C10H16O

Chalcedony Nodule (Carnelian/Agate)

Chalcedony (Silicon Dioxide, SiO2)

Painted Garden Rock (likely Granite or Limestone base)

Silicon Dioxide (SiO2) / Calcium Carbonate (CaCO3) based substrate with Acrylic/Enamel pigments

Banded Calcite (often sold as 'Travertine' or 'Mexican Onyx')

Calcium Carbonate (CaCO3)

Blue Opal Inlay (Simulated/Lab-created)

Hydrated Amorphous Silica (SiO2·nH2O) with polymer resin

Cubic Zirconia and Synthetic Ruby Jewelry

Cubic Zirconia (ZrO2) and Synthetic Corundum (Al2O3)

Banded Agate

Cryptocrystalline Quartz (SiO2)

Banded Sandstone

Arenite with Liesegang banding (primarily SiO2 with FeO(OH) impurities)

Dendritic Limestone

Calcite with Manganese Oxide (Manganese Dendrites)

Banded Gneiss

Gneiss (quartz-feldspar-biotite metamorphic rock)

Agate Geode / Thunderegg

Chalcedony (cryptocrystalline variety of Quartz), SiO2

Fossil Rugose Coral (Horn Coral)

Order Rugosa (likely Grewingkia or Heliophyllum species); Calcium Carbonate (CaCO3)

Goldstone (Brown)

Aventurine Glass (Silicon Dioxide infused with Copper crystals)

Sandstone with Iron Banding

Arenite with Hematite or Limonite staining (SiO2 with Fe2O3)

Petoskey Stone

Hexagonaria percarinata (Fossilized Rugose Coral)