Mineral Based Composite

Sunstone

Plagioclase Feldspar (Na,Ca)(Al,Si)4O8

Polished orbicular granite (likely larvikite or orbicular diorite)

Quartz/feldspar-bearing granitoid with dark amphibole–biotite minerals; exact variety requires testing

Synthetic Zinc/Polycarbonate Composite (Bey-specimen)

Zinc Alloy (Zamak 3) with Polycarbonate (C15H16O2)n Overlay

Sandstone Cobble

Arenite (Secondary classification based on grain size)

Tumbled carnelian agate with dark mineral inclusions

Carnelian, an orange variety of microcrystalline quartz (chalcedony), SiO₂; dark inclusions are likely iron oxides/hydroxides, possibly hematite, goethite, or a basaltic/matrix fragment

Banded Agate

Sedimentary Cryptocrystalline Quartz (SiO2)

Sandstone (likely Graywacke or Lithic Sandstone)

Arenite / Wacke (SiO2 based with lithic fragments)

Yellow Jasper

Chalcedony (SiO2) with iron oxide inclusions

Water and Silt (Sedimentary Environment)

Suspended Sediment / H2O (dihydrogen monoxide)

Turquoise

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

Blue Aventurine

Silicon Dioxide (SiO2) with inclusions of Dumortierite

Scoria (Vesicular Basalt)

Vesicular Basalt

Gold Nugget

Native Gold (Au)

Amethyst Geode

Silicon Dioxide (SiO2) with iron impurities

Native Gold

Gold (Au)

Gold Nugget

Native Gold (Au)

Faceted Peach Morganite (Beryl)

Morganite (Be3Al2Si6O18 with trace Manganese)

Gold Nugget

Native Gold (Au)

Bloodstone (also known as Heliotrope)

Silicon Dioxide (SiO2) - variety of Chalcedony

Native Copper

Native Copper (Cu)

Pyrite

Iron Pyrite (FeS2)

Dalmatian jasper

Orbicular rhyolite, commonly marketed as Dalmatian jasper; quartz–feldspar volcanic rock with dark aegirine/arfvedsonite-like inclusions

Asphalt

Asphalt concrete (engineered material, not a naturally occurring rock/mineral in this form)

Sandstone

Arenite (SiO2 based with quartz, feldspar, or lithic fragments)

Sea Glass

Man-made vitreous material (silica-based glass)

Sea Glass

Man-made vitreous material (silica-based glass)

Dyed Blue Agate

Silicon Dioxide (SiO2) with artificial cobalt-based dye

Gold Nugget

Gold (Au)

Diamond

Carbon (C)

Gold Ore / Native Gold

Native Gold (Au)

Gold

Native Gold (Au)

Gold

Gold (Au)

Sandstone

Sandstone (composed primarily of sand-sized minerals or rock grains)

Blue opalite (often sold as synthetic opal)

Opalite glass; amorphous hydrated silica if natural opal (SiO₂·nH₂O)

Clear quartz sphere or polished quartz cabochon (tentative)

Quartz, silicon dioxide (SiO₂); appearance may also be consistent with ordinary glass, which cannot be ruled out from the image alone

Basalt

Basalt

Fluorite

Fluorite (Calcium Fluoride, CaF2)

Red Sandstone (Siltstone pebble)

Arenite / Siltstone (Silicon dioxide based with hematite impurities)

Bauxite

Alumina-rich rock (consisting of Gibbsite, Boehmite, and Diaspore)

Granite

Phaneritic Granitoid

Wallboard/Drywall (Gypsum-based)

Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O

Turquenite (Dyed Howlite)

Dyed Ca2B5SiO9(OH)5 (Calcium Borosilicate Hydroxide)