Mineral With Artificial Coating

Green agate/geode slab

Cryptocrystalline quartz (chalcedony), SiO₂, likely agate with druzy quartz

Quartz (Tumbled)

SiO2 (Silicon Dioxide)

Epidote Quartzite

Metamorphic quartz rock with epidote (SiO2 + Ca2Al2(Fe3+,Al)(SiO43)(Si2O7)O(OH))

Dyed Quartz (imitating Emerald/Green Quartz)

Silicon Dioxide (SiO2) with artificial pigment

Dyed Blue Agate

Silicon dioxide (SiO2) with artificial pigment

Dyed Quartz Geode

Silicon Dioxide (SiO2) with artificial pigment

Quartz-rich river pebble

Likely quartz-rich granitic rock; mainly quartz (SiO₂), with possible feldspar and mica

Sandstone with Liesegang Rings

Quartzose Sandstone with Iron Oxide Precipitation

Dyed Blue Quartz

Silicon Dioxide (SiO2) with artificial pigment

Pink Dyed Agate Geode Slice

Silicon Dioxide (SiO2) with artificial pigment

Blue Dyed Agate

Silicon Dioxide (SiO2) with artificial pigment

Blue Dyed Agate Slice

Silicon Dioxide (SiO2) with artificial pigment

Blue Quartz (Dyed)

Silicon Dioxide (SiO2) with artificial pigment

Dyed Agate Slice

Microcrystalline Quartz (SiO2) with artificial pigment

Blue Onyx (Dyed Agate)

Cryptocrystalline Quartz (SiO2) with artificial pigment

Blue Onyx (Dyed Agate/Chalky Chalcedony)

Silicon Dioxide (SiO2) with artificial pigment

Dyed Tumbled Quartz (Dragon's Vein Agate/Quartz)

Silicon Dioxide (SiO2) with artificial dye

Dyed Agate

Silicon Dioxide (SiO2) with artificial pigment

Blue Agate (Dyed)

Silicon Dioxide (SiO2) with artificial pigment

Man-made Green Quartz (Lab-grown or Treated)

Silicon Dioxide (SiO2) with artificial coloration

Dyed Agate

Silicon Dioxide (SiO2) with artificial colorants

Pink Tumbled Agate (Dyed)

Silicon Dioxide (SiO2) with artificial dyes

Dyed Dragon Vein Agate

Silicon Dioxide (SiO2) with artificial pigment

Dyed Quartz (often sold as 'Blue Quartz' or 'Blue Agate')

Silicon Dioxide (SiO2) with artificial pigment

Dyed Quartz Geode

Silicon Dioxide (SiO2) with artificial pigment

Dyed Quartz Geode

Silicon Dioxide (SiO2) with artificial pigment

Dyed Quartz / Rose Quartz Imitation

Silicon Dioxide (SiO2) with artificial pigment

Dyed Agate

Silicon Dioxide (SiO2) - Chalcedony variety

White druzy quartz pendant with a blue crystal accent

Quartz (SiO₂); the blue material is not identifiable from the image

Polished white/gray stone, possibly quartz or marble

Indeterminate; likely quartz (SiO₂) or calcite-rich marble (CaCO₃)

Red Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with Fe2O3 inclusions)

Dyed Dragon Vein Agate

Silicon Dioxide (SiO2) with artificial pigment

Gold Leaf in Glass Vial

Gold (Au)

Orange Quartz (or Citrine Quartz)

Silicon Dioxide (SiO2)

Dyed Agate

SiO2 (Silicon Dioxide)

Quartz Druzy on Matrix

Silicon Dioxide (SiO2)

Dyed Blue Agate Slice

Silicon Dioxide (SiO2)

Blue Agate Geode (Dyed)

Cryptocrystalline Quartz (SiO2)

Dyed Blue Agate

Silicon Dioxide (SiO2) with artificial pigment

Blue aventurine quartz (likely dyed or tumbled quartzite)

Quartz, silicon dioxide (SiO₂), with blue coloration from inclusions or dye

Peacock Ore (Treated Chalcopyrite)

Copper Iron Sulfide (CuFeS2) coated with oxides

Conglomeratic gravel / polymictic breccia

Polymictic rudite, likely anthropogenic or beach/stream gravel; composition varies