Mineraloid (Man Made Glass)

Granite

Phaneritic Plutonic Felsic Rock

Crackled Quartz (Blue Dyed)

Silicon Dioxide (SiO2) with anthropogenic dye

Fossiliferous Limestone (Coquina)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Native Silver

Silver (Ag)

Pyrite

Iron Sulfide (FeS2)

Pyrite

Iron Disulfide (FeS2)

Turquoise

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

Common Marble

Calcium Carbonate (CaCO3)

Chalcanthite (Likely Synthetic/Lab-Grown)

Hydrated copper(II) sulfate (CuSO4·5H2O)

Dyed Quartz (often sold as 'Blue Quartz' or 'Blue Agate')

Silicon Dioxide (SiO2) with artificial pigment

Lapis Lazuli

Lapis Lazuli (a rock type, not a single mineral, composed primarily of lazurite, calcite, and pyrite)

Granite

Granite (felsic intrusive igneous rock)

Granite

Granite (a common rock type, not a single mineral with a formula. Composed primarily of quartz, feldspar, and mica/amphibole).

Rose Quartz Carving

Quartum roseum (Variety of Quartz, SiO2)

Rough Diamond

Diamond (Pure Carbon: C)

Carnelian

Chalcedony (cryptocrystalline quartz), SiO2

Mixed Gemstone Beaded Jewelry

Various minerals (e.g., Quartz varieties like Rose Quartz, Amethyst; Peridot; Garnet; etc.)

Smoky Quartz

Smoky Quartz (SiO2)

Pyrite

Iron Disulfide (FeS2)

White Marble

Recrystallized Calcite (CaCO3)

Limonite (Iron Ore)

Hydrous Iron Oxide (goethite, lepidocrocite)

BROWN GRANITE (likely 'Tan Brown' or similar)

Granite (specifically a variety rich in orthoclase feldspar, often with biotite and possibly hornblende)

Crushed Limestone

Calcium Carbonate (CaCO3)

Metal Alloy (Jewelry)

Not a naturally occurring rock or mineral; likely a metal alloy for jewelry. Possible compositions include sterling silver (92.5% silver, 7.5% copper), or other silver/gold alloys.

United States Quarter Dollar

Cupronickel Clad Alloy (75% Copper, 25% Nickel over a 100% Copper core)

Asphalt (Bituminous Concrete)

Bituminous mix / Anthropogenic conglomerate

Quartz

Silicon Dioxide (SiO₂)

Marble

Marble (metamorphosed limestone/dolostone). Predominantly composed of Calcite (CaCO3) for marble derived from limestone, or Dolomite (CaMg(CO3)2) for marble derived from dolostone.

Chert (or possibly Flint)

Chert (variant: Flint)

Aventurine (likely Green Aventurine)

Silicon Dioxide (SiO2) with mineral inclusions

Granite Cobble/Pebble

Granite

Serpentinite

Serpentinite (composed primarily of serpentine-group minerals like antigorite, chrysotile, and lizardite; chemical formula varies but generally Mg3Si2O5(OH)4)

Marble

Marble (metamorphosed limestone or dolostone), primarily composed of calcite (CaCO3) or dolomite (CaMg(CO3)2)

Titanium Aura Quartz

Titanium-coated Silicon Dioxide (SiO2)

Cat's Eye Shell (Shiva Shell)

Operculum of the Turbo petholatus (Tapestry Turban Snail), predominantly Calcium Carbonate (Aragonite)

Amber

Succinite (specifically for Baltic amber); Approximate formula: C10H16O

Amber

Succinite (Resinite)

Red Jasper

Jasper (a variety of Chalcedony, SiO₂)

Baltic Amber (Butterscotch variety)

Succinite

Jade (likely Nephrite Jade based on appearance)

Nephrite (a variety of actinolite, Ca2(Mg,Fe)5Si8O22(OH)2)

Red Coral

Corallium rubrum (Calcium Carbonate, CaCO3 with Carotenoid pigments)

Shell Cameo

Cypraecassis rufa (Bullmouth Queen Helmet Shell)