Man Made Material (Jewelry, Metal Alloy)

Probable metallic meteorite fragment

Unclassified iron meteorite candidate, chiefly kamacite (α-Fe–Ni alloy)

Fossiliferous limestone with colonial coral

Calcite (CaCO₃) limestone containing fossil tabulate or rugose coral colonies

Iron Meteorite

Iron-nickel alloy (e.g., Kamacite, Taenite)

Tumbled Clear Quartz/Rock Crystal

Silicon Dioxide (SiO2)

Amber cabochon pendant

Amber (fossilized plant resin), chiefly polymerized diterpenoid resin

Bauxite

Bauxite (Al(OH)3, AlO(OH))

Blue glassy-looking specimen, possibly dyed or coated mineral

Not identifiable from the photograph; possibilities include dyed quartz or glassy slag, but composition cannot be established visually.

Goldstone (Red)

Aventurine Glass (Cupriferous glass)

Gem-set gold ring

Likely a faceted diamond (carbon, C) set in a gold-alloy ring; the surrounding stones are not identifiable from the image.

Cultured Marble (Synthetic)

Polymer-matrix composite (typically calcium carbonate in polyester resin)

Ferro-slag (Leland Blue/Slag Glass)

Anthropogenic Vitreous Silica (Industrial Slag)

Red-orange cabochon, likely carnelian or glass imitation

Carnelian: chalcedony (microcrystalline SiO₂), commonly iron-colored

Asphalt Chunk

Asphalt concrete

Sulfide Ore (likely Galena and Sphalerite in Quartz)

Lead-Zinc Ore (PbS and ZnS)

Goldstone (brown goldstone)

Man-made aventurine glass, typically copper-bearing silica glass

Concrete with Aggregate

Composite construction material; primary matrix is Calcium Silicate Hydrate (C-S-H)

Opalite (Synthetic Moonstone/Opal)

Synthetic Silica Glass

Opalite

Man-made Glass (Synthetic Opalized Glass)

Diamond Druzy (Crystalline Diamond)

Carbon (C)

Painted River Rock

Artificially Coated Sedimentary Rock

Chalcopyrite in Matrix

CuFeS2

Faceted transparent gemstone pendant

Uncertain from image; likely faceted quartz (SiO₂), cubic zirconia (ZrO₂), or glass imitation

Quartz pebble (Quartztite fragment)

Silicon Dioxide (SiO2)

Sea Glass

Amorphous silicon dioxide (man-made glass weathered by nature)

Native copper (probable copper-rich mineral specimen)

Copper, Cu; possibly mixed with cuprite, malachite, and iron-oxide alteration minerals

Sea Glass

Man-made silicate glass (Amorphous silicon dioxide)

Pearls (likely freshwater cultured pearls)

Pearl: nacre, primarily aragonite (CaCO₃) with conchiolin

Concrete

Anthropogenic Sedimentary Rock (Hydrated Calcium Silicate)

Sandstone (with concrete/human-made layer)

Clastic Sedimentary Rock (primarily Quartz/Feldspar grains)

Silver (S925)

Native Silver (Ag)

Titanium-Coated Hematite (Aura Hematite)

Titanium-bonded Hematite (Fe2O3 with a Ti coating)

Titanium Aura Quartz

Silicon Dioxide (SiO2) coated with Titanium and Niobium

Tumbled milky quartz pebble

Quartz (silicon dioxide, SiO₂), likely milky quartz

Tumbled clear quartz (rock crystal)

Quartz, silicon dioxide (SiO₂)

Likely tumbled or cut quartz/chalcedony fragment

Silicon dioxide (SiO₂), probably microcrystalline quartz or quartz

Blue Slag Glass

Anthropogenic Amorphous Silicon Dioxide

Opalite Egg

Synthetic Glass (Simulated Opal)

Cullet (Slag Glass)

Amorphous Silica (Industrial byproduct)

Iron meteorite (probable, possibly industrial iron slag)

Fe–Ni metallic alloy, commonly kamacite and taenite

Polished labradorite sphere

Labradorite, calcic plagioclase feldspar ((Ca,Na)(Al,Si)₄O₈)

Sea Glass

Man-made silicate glass weathering product

Aura Quartz

Silicon Dioxide (SiO2) with metallic vapor coating