Mineral With Artificial Coating

Golden Healer Quartz

Silicon Dioxide (SiO2) with Ferruginous (Iron Oxide) inclusions

Limonite-stained Granite

Felsic Plutonic Rock with Hydrated Iron Oxides

Synthetic Resin (Artificial Specimen)

Polyurethane or Polyester Resin

White Coral

Corallium rubrum (biocarbonate calcium) / CaCO3

Chalcedony on Matrix

Silicon Dioxide (SiO2)

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Agate (Polished Slice)

Banded Chalcedony (SiO2)

Carnelian (a variety of Chalcedony)

Cryptocrystalline Quartz (SiO2) with iron oxide inclusions

Bornite (Peacock Ore)

Bornite (Cu5FeS4)

Amethyst (Agate/Chalcedony variety)

Silicon Dioxide (SiO2) with iron impurities

Citrine (Iron-stained Quartz)

Silicon Dioxide (SiO2)

Carnelian and Dyed Agate

Chalcedony (Silicon Dioxide, SiO2)

Blue Dyed Quartzite

Silicon Dioxide (SiO2) with artificial pigment

Coprolite

Coprolite (fossilized feces)

Chert Nodules

Chert (Silicon Dioxide, SiO2)

Heat-Treated Citrine

Silicon Dioxide (SiO2) with iron impurities

Heat-Treated Citrine (Amethyst)

Silicon Dioxide (SiO2) with iron impurities

Quartz with Hematite Inclusions

Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3)

Native Copper with Malachite and Chrysocolla

Native Copper (Cu) with Malachite [Cu2CO3(OH)2] and Chrysocolla [(Cu,Al)2H2Si2O5(OH)4·nH2O]

Hematite / Ironstone

Iron Oxide (Fe2O3)

Dyed Blue Quartzite

SiO2 (Silicon Dioxide) with artificial colorants

Titanium Aura Quartz

Titanium-coated Silicon Dioxide (SiO2)

Epidote in Matrix

Epidote; Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)

Chert (Jasper-bearing)

Microcrystalline silica (SiO2) with iron oxide inclusions

Fluorite

Calcium Fluoride (CaF2)

Synthetic Blue Aura Quartz

Silicon Dioxide (SiO2) with Metallic Infusion

Dyed Blue Agate (Dragon Vein Agate)

Silicon Dioxide (SiO2) with artificial cobalt/organic dyes

Dyed Agate (Tumbled)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Dyed Dalmatian Jasper (Dalmatian Stone)

Perthitic Feldspar with Arfvedsonite inclusions

Malachite or Chrysocolla on Host Rock

Cu2(CO3)(OH)2 (Malachite) or (Cu,Al)2H2Si2O5(OH)4 (Chrysocolla)

Blue Dyed Agate

Chalcedony (cryptocrystalline variety of Quartz), SiO2

Dyed Blue Agate (Slab)

Agate (Variety of Chalcedony/Microcrystalline Quartz), SiO2

Smoky Quartz

SiO2 (Silicon Dioxide with aluminum impurities)

Fluorite

Calcium Fluoride (CaF2)

Green Druzy Quartz (Prasiolite)

Silicon Dioxide (SiO2) with inclusions (typically Chlorite or Actinolite)

Chert (Jasper-like Silicate)

Microcrystalline quartz (SiO2)

Heat-Treated Citrine

Quartz (Silicon Dioxide, SiO2)

Blue Agate (likely dyed)

Silicon Dioxide (SiO2)

Aura Quartz (Titanium or Angel Aura coated)

Silicon Dioxide (SiO2) with metallic vapor coating

Aqua Aura Quartz

Silicon Dioxide (SiO2) bonded with Gold (Au)

Sandstone (Red Sandstone)

Arenite (SiO2 based with Fe2O3 staining)