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

Yellow Calcite

Calcium Carbonate (CaCO3)

Amber

Amber (C10H16O)

Green Aventurine

Quartzite with Fuchsite (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)

Green Aventurine

Silicon Dioxide (Quartz) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)

Green Aventurine

Aventurine Quartz (SiO2 with inclusions of Fuchsite)

Polished Tumbled Stone (Dark Chalcedony / Jasper)

Silicon Dioxide (SiO2)

Sandstone Concretion

Arenaceous concretion (primarily SiO2 with Fe2O3 staining)

Star ruby cabochon ring

Corundum, Al₂O₃ (ruby variety), displaying asterism

Graphite

Graphite (Carbon, C)

Green-and-white terrazzo (likely serpentine/marble aggregate)

Composite decorative stone; probable serpentinite (Mg₃Si₂O₅(OH)₄) with white calcite marble fragments in cementitious matrix

Blue chalcedony (likely dyed or coated)

Microcrystalline quartz, SiO₂ (chalcedony)

Dyed, polished stone—possibly rhodonite or pink jasper

Likely rhodonite (MnSiO₃) or manganese-rich jasper; exact identification requires testing

Blue glassy mineral fragment, possibly sodalite or dyed/cobalt glass

Uncertain; likely sodalite (Na₈Al₆Si₆O₂₄Cl₂) if natural, but vivid blue color may indicate cobalt-colored glass

Yellow Quartz (Citrine Quartzite)

Silicon Dioxide (SiO2)

Green Aventurine

Silicon Dioxide with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)

Amber (Rough)

Amber (Fossilized Tree Resin, succinite)

Amber

Succinite (fossilized tree resin)

Amber

Succinite (fossilized tree resin)

Smoky Quartz

Silicon Dioxide (SiO2)

Amber

Succinicum (Organic compound, primarily C10H16O)

Smoky Quartz

Silicon Dioxide (SiO2)

Citrine and Quartz

Silicon Dioxide (SiO2)

Blue lace agate (tumbled)

Microcrystalline quartz, SiO₂ (chalcedony variety)

Amber

Succinite (C10H16O)

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite

Tumbled yellow quartz (likely citrine or iron-stained quartz)

Quartz, SiO₂; yellow color from trace iron or irradiation/heat-related coloration

Moonstone ring

Moonstone, a feldspar variety (typically orthoclase or adularia; KAlSi₃O₈)

Red Jasper Pebble

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Chert / Flint

Cryptocrystalline quartz (SiO2)

Mixed mineral and gemstone specimens

Likely amethyst (quartz), malachite, blue calcite or dyed chalcedony, red jasper, and green aventurine/serpentine

Blue Quartzite (likely dyed)

Silicon dioxide (SiO2) with likely color treatment

Tumbled jasper or chalcedony

Microcrystalline quartz, SiO₂; likely opaque jasper with chalcedonic zones

Painted River Rock

Painted Quartzite or Smooth Siltstone

Rough Corundum (likely Sapphire or Common Corundum)

Aluminum oxide (Al2O3)

Goldstone (blue-goldstone–style glass) beads

Artificial aventurine glass, typically silica glass with copper inclusions; not a natural mineral

Pyrite

Iron Sulfide (FeS2)

Emerald

Beryl (Be3Al2(SiO3)6)

Green Aventurine

Quartzite with Fuchsite inclusions (SiO2)

Green glass cabochon or tumbled stone

Indeterminate; likely man-made glass, possibly aventurine glass rather than a natural mineral

Red jasper pebble

Jasper, microcrystalline quartz (SiO₂) colored by iron oxides

Multi-stone gemstone ring

Likely faceted blue topaz or synthetic blue stone with clear stones, possibly cubic zirconia or diamond; metal setting appears silver-colored alloy

Tumbled amethyst

Quartz, crystalline silicon dioxide (SiO₂), purple variety colored mainly by iron impurities and irradiation