Mineral With Artificial Coating

Dyed blue chalcedony (likely dyed agate or quartzite)

Chalcedony, microcrystalline SiO₂; blue color likely artificial dye

Dyed pink agate slice

Agate (microcrystalline quartz, SiO₂), commonly chalcedony with artificial dye

Polished malachite

Malachite, Cu₂CO₃(OH)₂

Fire Quartz (Hematoid Quartz)

Quartz with Hematite inclusions (SiO2 + Fe2O3)

Basalt with an orange mineral vein

Fine-grained basalt, likely containing iron-stained calcite or zeolite; exact identification requires testing

Titanium Coated Kyanite (Aura Kyanite)

Aluminosilicate (Al2SiO5) with a Titanium-Niobium vacuum-deposited coating

Limonite (Iron Ore)

Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)

Blue quartz crystal (likely synthetic or coated quartz)

Quartz, silicon dioxide (SiO₂); possible aqua-aura quartz

Weathered granite or granitic rock

Granite; chiefly quartz, feldspar, and mica

Quartz Druzy

Silicon Dioxide (SiO2)

Tumbled goldstone-like quartz pebble

Likely iron-stained quartz or jasper; exact identification requires testing

Quartz Pebble (Iron-Stained)

Silicon Dioxide (SiO2)

Red Sandstone

Sedimentary Clastic Rock (Quartz Arenite / Arkose)

Amethyst (Hematoid Quartz)

Silicon Dioxide (SiO2) with Ferric Iron inclusions

Iron-Stained Quartz

Silicon Dioxide with Iron Oxide (SiO2)

Likely tumbled sandstone or limestone

Quartz-rich sandstone (possibly calcarenite/limestone)

Tumbled serpentine

Serpentinite; chiefly serpentine-group minerals (antigorite, lizardite, chrysotile), commonly with magnetite and carbonate

Chrysocolla-bearing rock (likely chrysocolla in a host rock)

Chrysocolla, hydrated copper aluminosilicate: approximately (Cu,Al)₂H₂Si₂O₅(OH)₄·nH₂O

Unakite (likely)

Epidote–K-feldspar–quartz aggregate; commonly derived from altered granite

Weathered sandstone or iron-rich quartzite fragment

Quartz-dominated siliciclastic rock; likely ferruginous sandstone (SiO₂-rich)

Vesicular basalt

Basalt, predominantly plagioclase + pyroxene ± olivine; vesicles formed by trapped volcanic gas

Red Sandstone

Ferruginous Sandstone (SiO2 with Iron Oxide impurities)

Chert with Quartz Druzy

Microcrystalline Quartz (SiO2) with Drusy Quartz Coating

Blue Dyed Agate Geode

Chalcedony (cryptocrystalline Quartz), SiO2

Botryoidal Quartz Cluster (Druzy Stalactitic Quartz)

Silicon Dioxide (SiO2)

Weathered Pyrite Nodule

Iron Sulfide (FeS2) undergoing oxidation to limonite/goethite

Red Sandstone

Ferruginous Sandstone (SiO2 with Iron Oxide)

Green Chalcedony (Batu Akik)

Silicon Dioxide (SiO2)

Purple Dyed Dalmatian Stone

Dyed Peralkaline Trachyte

Druzy Quartz on Limestone

Silicon Dioxide (SiO2)

Limonite with Goethite

Iron Hydroxide Mixture (FeO(OH)·nH2O)

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Manganese-coated Sandstone

Clastic sedimentary rock with Manganese Oxide (often Pyrolusite or Psilomelane)

Weathered vesicular basalt (likely amygdaloidal basalt)

Basalt, chiefly plagioclase + pyroxene ± olivine; cavities may contain secondary zeolites, calcite, or chlorite

Peacock Ore (Bournite/Chalcopyrite)

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

Banded Agate (Dyed)

SiO2 (Silicon Dioxide / Microcrystalline Quartz)

Bornite (Peacock Ore) / Acid-treated Chalcopyrite

Bornite (Cu5FeS4) or Chalcopyrite (CuFeS2)

Tumbled milky quartz

Quartz, silicon dioxide (SiO₂)

Goldstone (blue-goldstone–style glass) beads

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

Iron-rich brown rock, possibly limonite/goethite

Limonite (hydrated iron oxides; commonly goethite, FeO(OH), with hematite)

Chrysocolla-bearing copper ore

Chrysocolla (hydrated copper aluminosilicate), likely mixed with malachite, limonite, and quartz

Quartz geode or drusy quartz cluster

Quartz (silicon dioxide, SiO₂), likely a quartz-lined cavity in host rock