Mineral (Man Enhanced)

Dyed mineral cluster, likely calcite or aragonite

Calcite (CaCO₃) or aragonite (CaCO₃), artificially color-enhanced

Polished serpentine-rich stone (likely serpentine jasper or “rainforest jasper”)

Serpentine-group minerals, chiefly antigorite/lizardite, with iron oxides and silica-rich rock matrix

Polished ocean jasper (orbicular jasper), possibly brecciated jasper

Microcrystalline quartz/chalcedony (SiO₂) with iron-oxide pigments and minor volcanic inclusions

Blue lace agate (likely dyed or color-enhanced)

Microcrystalline quartz (chalcedony), SiO₂

Carborundum (Silicon Carbide)

Silicon Carbide (SiC)

Concretion with Geode Cavity

Ferruginous Sandstone Concretion with Quartz Center

Dyed Agate Slice

Silicon Dioxide (SiO2) - Chalcedony variety

Chrome Diopside

Magnesium Calcium Silicate (MgCaSi2O6) containing Chromium impurities

Shiva Lingam

Cryptocrystalline Quartz (Jasproid/Jasper)

Milky quartz (likely)

Quartz, silicon dioxide (SiO₂)

Small rounded mineral pebble, possibly quartz

Uncertain; likely microcrystalline or crystalline SiO₂ (quartz), potentially with iron-oxide staining

Titanium Aura Quartz

Silicon Dioxide (SiO2) coated with Titanium and Niobium

Diamond

Carbon (C)

Diamond (in a jewelry setting)

Carbon (C)

Peacock Ore (Bornite or Iridescent Chalcopyrite)

Bornite (Cu5FeS4) or Chalcopyrite (CuFeS2) with oxidation

Tumbled milky quartz

Quartz, silicon dioxide (SiO₂)

Clear Quartz Sphere (Rock Crystal)

Silicon Dioxide (SiO2)

Red Chalcedony (likely dyed)

Chalcedony (a variety of Quartz), SiO2

Dyed Pink Agate Slice

Silicon Dioxide (SiO2) - Chalcedony variety Agate

Iron-stained quartz-rich rock (possibly ironstone or ochre-coated quartz)

Undetermined ferruginous rock; yellow-brown coloration likely from goethite and/or limonite (hydrated iron oxides)

Iridescent chalcopyrite (“peacock ore”)

Chalcopyrite, CuFeS₂, commonly surface-oxidized to covellite and related copper sulfides

Opalite

Synthetic Opalite (Man-made glass)

Asphalt Chunk (Bituminous Concrete)

Aggregated Bitumen / Artificial Breccia

Blue chalcedony crystal pendant

Chalcedony, microcrystalline quartz (SiO₂), likely blue chalcedony or dyed quartz

Concrete with Aggregate

Artificial Conglomerate (Cement and Aggregate)

Likely clear quartz pebble or glassy quartz fragment

Quartz (silicon dioxide, SiO₂)

Diamond (Cut jewelry specimen)

Diamond (pure Carbon, C)

Aura Amethyst (Dyed/Coated)

Titanium-treated Silicon Dioxide (SiO2)

Clear Quartz (Faceted Crystal)

Silicon Dioxide (SiO2)

Peacock Ore

Bornite (Cu5FeS4) or Acid-Treated Chalcopyrite (CuFeS2)

Amethyst bead bracelet

Amethyst, purple quartz (SiO₂), with likely dyed or heat-treated agate/carnelian beads

Aventurine Quartz

Silicon Dioxide (SiO2) with Fuchsite inclusions

Iron-rich slag or ironstone; appearance is not diagnostic

Likely iron-oxide-rich material (hematite, Fe₂O₃, and/or magnetite, Fe₃O₄); possibly smelting slag

Opalite Egg

Synthetic Glass (Simulated Opal)

Rainbow Hematite Ring

Iron(III) oxide (Fe2O3) with thin-film coating

Tumbled milky quartz

Quartz — silicon dioxide (SiO₂), cryptocrystalline or microcrystalline variety possible

Polished banded agate

Agate, a banded variety of chalcedony (microcrystalline SiO₂)

Blue-green glassy mineral specimen, likely turquoise-colored fluorite or dyed material

Uncertain; possible fluorite (CaF₂), chrysocolla, or dyed calcite/glass

Aura Quartz (Titanium/Rainbow Quartz)

SiO2 (Silicon Dioxide) with metallic coating

Silicon Carbide (Carborundum)

Silicon Carbide (SiC)

Blue Slag Glass

Man-made Silicon Dioxide (Amorphous)

Green Agate

Silicon Dioxide (SiO2) - Variety of Chalcedony