Organic Gemstone (Not A Rock)

Chert / Flint

Cryptocrystalline Quartz (SiO2)

Fossil bivalve shell

Likely an extinct or modern-like ribbed cockle/scallop; exact genus requires locality and diagnostic hinge features

Lapis Lazuli

Sodium aluminum silicate with sulfur (main component: Lazurite [(Na,Ca)8(AlSiO4)6(SO4,S,Cl)2])

Amber

Succinicum (Organic compound, primarily C10H16O)

Bauxite

Bauxite (mixture of Hydrous Aluminum Oxides)

Lapis Lazuli

Complex rock primarily containing Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2

Note: Item is not a geological specimen

Guitar Components (Steel, Nickel, Plastic, Wood)

Lapis Lazuli (Raw)

Lazurite-rich metamorphic rock; Na3Ca(Al3Si3O12)S

Petrified Wood

Silicified Wood (primarily SiO2 - Silicon Dioxide / Chalcedony)

Precious Coral

Corallium rubrum (Calcium Carbonate, CaCO3)

Precious Coral

Corallium rubrum (Calcium carbonate with trace carotene)

Chert (Yellow Jasper/Flint)

Silicon Dioxide (SiO2)

Chert (Iron-stained)

Microcrystalline Quartz (SiO2)

Metallic Ornament / Jewelry

N/A - This is an artificial object, not a geological specimen.

Bauxite

Bauxite (Al(OH)3, γ-AlO(OH), and α-AlO(OH))

Bauxite (Pisolitic Bauxite)

Bauxite (mixture of Hydrous Aluminum Oxides)

Bauxite

Alumina ore (Mixture of Gibbsite, Boehmite, and Diaspore)

Amber (in Matrix/Shale)

Amber (Fossilized Tree Resin)

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Moss agate bracelet

Chalcedony (microcrystalline quartz, SiO₂) with chlorite/amphibole inclusions

Chert (Arrowhead/Artifact Fragment)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Pearl

Calcium carbonate (CaCO3) + organic conchiolin

Amber

Succinite (Fossilized Tree Resin)

Turquoise and Red Coral (with Grizzly Bear Claw)

Turquoise (CuAl6(PO4)4(OH)8·4H2O) and Precious Coral (Corallium rubrum)

Sea Shell (Mollusk Shell)

Calcium Carbonate (Aragonite/Calcite)

Amber

Fossilized tree resin (Amorphous organic polymer)

Pearl (Pendant)

Calcium Carbonate (Aragonite/Calcite) - CaCO3

Freshwater Pearl

Aragonite / Biogenic Calcium Carbonate (CaCO3)

Lapis Lazuli (polished cabochon)

Lazurite-rich metamorphic rock (approx. Na6Ca2Al6Si6O24(SO4,S,Cl)2)

Chert (Jasper/Flint variant)

Microcrystalline quartz (SiO2)

Lapis Lazuli

Lapis Lazuli (Primary mineral: Lazurite (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2)

Amber

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

Chert (Iron-stained)

Chert (SiO2)

Chert (Yellow Jasper/Flint)

Silicon dioxide (SiO2) - Cryptocrystalline Quartz

Chert (specifically Flint or Jasper variant)

Cryptocrystalline Quartz (SiO2)

Red Coral

Corallium rubrum

Moss Agate

Silicon Dioxide (SiO2) with inclusions of manganese or iron oxides

Chert (Jasper/Agate Peat)

Microcrystalline Quartz (SiO2)

Lapis Lazuli

Na8(Al6Si6O24)S2 (composed primarily of Lazurite, Calcite, and Pyrite)

Note: This is a Man-Made Object (Costume/Prop Patch)

Synthetic fiber and pigments (Cellulose/Plastic-based composite)

Bauxite

Bauxite (Mixture including Gibbsite Al(OH)3, Boehmite γ-AlO(OH), and Diaspore α-AlO(OH))

Man-made Synthetic Material (Plastic/Composite)

Acrylonitrile Butadiene Styrene (ABS) or High-Impact Polystyrene (HIPS)