Mineral With Artificial Coating

Aura Quartz Bead

Silicon dioxide (SiO2) with metal coating

Painted Rock / Geode Specimen

Silicon Dioxide with artificial pigment coating

Likely polished black-and-white stone fragment

Indeterminate from image; possibly tourmalinated quartz, black-and-white jasper, or coated stone

Aura Quartz

Silicon Dioxide (SiO2) treated with metal vapor

Red Painted Rock

Artificial Coated Lithic Fragment

Rainbow-coated amethyst (likely treated quartz)

Quartz, SiO₂; purple color from iron-related defects. The iridescent surface appears artificially coated, often with a titanium-based film.

Iridescent red crystal cluster, likely aura-coated quartz

Quartz (SiO₂), possibly metal-coated; exact identification is uncertain from the photo

Aqua Aura Quartz

Titanium/Gold-coated Silicon Dioxide (SiO2)

Polished druzy quartz specimen

Quartz (SiO₂), likely druzy quartz with possible blue chalcedony or inclusions

Aura Quartz

Titanium-coated Silicon Dioxide (SiO2)

Iridescent polished/tumbled stone (likely coated quartz or glassy synthetic material)

Indeterminate; possibly quartz (SiO₂) with an artificial iridescent coating

Aura Quartz

Silicon Dioxide (SiO2) with Titanium/Metal vapor coating

Tumbled chalcedony/agate (likely botryoidal variety)

Microcrystalline quartz, SiO₂; possibly druzy chalcedony or common agate

Bismuth

Native Bismuth (Bi)

Titanium Coated Agate Geode

Silicon Dioxide (SiO2) with metallic vapor coating

Rainbow aura quartz (treated quartz crystal)

Quartz, SiO₂, with a thin artificial metal-oxide coating

Mystic Topaz

Al2SiO4(F,OH)2 (Coated)

Blue quartz (likely tumbled dyed or coated quartz)

Quartz, silicon dioxide (SiO₂)

Dyed and Metallic Coated Agate Geode

Silicon Dioxide (SiO2) with titanium/gold vapor deposition coating

Titanium-Coated Hematite (Aura Hematite)

Titanium-bonded Hematite (Fe2O3 with a Ti coating)

Painted River Rock

Artificially Coated Sedimentary Rock

Polished black stone, possibly basalt or black obsidian

Likely fine-grained basalt (plagioclase and pyroxene) or volcanic glass (obsidian; rhyolitic composition)

Yellow quartz-bearing rock, possibly sulfur-stained quartz or calcite

Indeterminate; likely quartz (SiO₂) and/or calcite (CaCO₃) with yellow iron/sulfur staining

Blue chalcedony (likely dyed or coated)

Chalcedony, microcrystalline quartz (SiO₂)

Dyed or coated quartz/amethyst specimen (likely)

Quartz, SiO₂; purple portion may be amethyst, iron-bearing quartz

Unidentified polished dark stone with a possible quartz fragment

Indeterminate; appearance may reflect polished basalt, obsidian, or iron-rich rock, with a pale quartz/feldspar inclusion

Aura Quartz (Coated Quartz)

Silicon Dioxide (SiO2) treated with metallic vapor

Man-made Dyed Aura Quartz

Silicon Dioxide (SiO2) with metallic coating/dye

Dyed mineral cluster, likely calcite or aragonite

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

Rainbow Hematite / Magnetic Hematite

Iron oxide (Fe2O3) - often synthetic/coated for beads

Dyed Aura Quartz

Silicon Dioxide (SiO2) with metallic coating

Aura Druzy Agate (Star Shape)

Silicon Dioxide (SiO2) with Titanium/Metal Vapor Coating

Tumbled blue-dyed stone, likely basalt or blue aventurine

Likely fine-grained basalt (plagioclase and pyroxene), possibly coated or dyed; exact identification requires testing

Obsidian (likely blue-sheen or coated obsidian)

Volcanic glass; primarily rhyolitic silica glass (SiO₂-rich, noncrystalline)

Blue slag-like mineral specimen, possibly bornite or chalcopyrite

Tentatively bornite (Cu5FeS4) or iridescent chalcopyrite (CuFeS2)

Blue metallic mineral specimen, possibly bornite or chalcopyrite

Bornite (Cu₅FeS₄) or chalcopyrite (CuFeS₂); exact identification requires testing

Tumbled polymetallic mineral specimen, likely chalcopyrite-bearing ore

Probable chalcopyrite (CuFeS₂) with quartz and iron-oxide minerals; exact identification is uncertain from the photograph

Painted River Pebble (likely Basalt or Greywacke)

Aphanitic Lithic Clast with Anthropogenic Pigment coating

Painted Garden Rock (likely Granite or Limestone base)

Silicon Dioxide (SiO2) / Calcium Carbonate (CaCO3) based substrate with Acrylic/Enamel pigments

Dyed Agate / Painted Stone

Silicon Dioxide (SiO2) with artificial pigment

Titanium Quartz (Aura Quartz)

Silicon Dioxide (SiO2) treated with Titanium

Painted Sandstone

Sandstone (clastic sedimentary rock) with acrylic/artistic coating