Mineral With Artificial Coating

Conglomeratic gravel / polymictic breccia

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

Green Aura Quartz (Titanium treated Kyanite or Quartz)

Silicon Dioxide (SiO2) or Aluminum Silicate (Al2SiO5) with Titanium/Metal Oxide coating

Quartz (Druzy / Crystalline)

Silicon Dioxide (SiO2)

Dyed Blue Agate

Silicon Dioxide (SiO2) with artificial pigment

Olivine (Peridot)

Magnesium Iron Silicate (Mg,Fe)2SiO4

Tangerine Quartz

Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)

Dyed Purple Agate Sliced

Silicon Dioxide (SiO2) with artificial pigment

Dyed Pink Agate Slice

Silicon Dioxide (SiO2) - Chalcedony variety Agate

Blue Agate (Dyed)

Silicon Dioxide (SiO2) - Variety of Chalcedony

Concrete

Anthropogenic Sedimentary Rock (Hydrated Calcium Silicate)

Dyed Pink Agate

Silicon Dioxide (SiO2) - variety Chalcedony

Dyed turquoise-colored howlite or magnesite (likely imitation turquoise)

Howlite: Ca₂B₅SiO₉(OH)₅; magnesite: MgCO₃

Iron-stained quartz

Quartz (SiO₂), with limonite/goethite coatings

Small rounded brown stone, likely weathered iron-rich rock

Indeterminate; possibly ferruginous sandstone, ironstone, or weathered basalt

Yellow Quartz (Citrine type/Tumbled Quartz)

Silicon Dioxide (SiO2)

Blue goldstone beads

Man-made aventurine glass (silica glass with metallic copper inclusions), not natural lapis lazuli

Tumbled Quartz

Silicon Dioxide (SiO2)

Dyed Dragon Vein Agate

Silicon Dioxide (SiO2) with artificial pigment

Polished chrysocolla-matrix stone (probable)

Chrysocolla, hydrated copper aluminosilicate; likely mixed with quartz, turquoise, or copper minerals

Small translucent tumbled crystal or gemstone

Indeterminate; likely quartz (SiO₂), possibly citrine or glass-like chalcedony

Polished dark pebble, possibly basalt or chert

Uncertain; likely fine-grained basalt (plagioclase–pyroxene) or microcrystalline silica (chert)

Limonite / Ironstone Concretion

Hydrated Iron Oxide (FeO(OH)%C2%B7nH2O)

Amethyst (Cabochon)

Silicon Dioxide (SiO2) with iron impurities

Dyed blue tumbled stone, likely howlite or magnesite

Howlite (Ca₂B₅SiO₉(OH)₅) or magnesite (MgCO₃), artificially dyed blue

Turquoise (Blue Howlite / Magnesite imitation)

CuAl6(PO4)4(OH)8·4H2O (for natural Turquoise); Ca2B5SiO9(OH)5 (for Howlite)

Clear Quartz Crystal

Silicon Dioxide (SiO2)

Dyed blue howlite or magnesite (tumbled stone)

Howlite: Ca₂B₅SiO₉(OH)₅; commonly sold dyed blue to imitate turquoise

Dalmatian Stone (commonly Dyed)

Dalmatian Jasper (Peralkaline igneous rock)

Desert Varnish on Sandstone

Ferromanganese coating on Quartz Arenite

Smoky Quartz

Silicon Dioxide (SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Polished chrysocolla cabochon

Chrysocolla, hydrated copper aluminum silicate; commonly mixed with malachite, quartz, or turquoise

Peacock ore (iridescent bornite/chalcopyrite)

Bornite (Cu₅FeS₄), commonly sold as heat-treated chalcopyrite (CuFeS₂)

Prasiolite

Silicon Dioxide (SiO2)

Rough Quartz (var. Citrine or Yellow Quartz)

Silicon Dioxide (SiO2)

Unidentified dark rock fragment

Likely fine-grained mafic mineral aggregate; exact identification requires testing

Pink Dyed Agate

Silicon Dioxide (SiO2) - Variety Agate

Red Tigers Eye (Bull's Eye)

SiO2

Dyed Blue Agate Slice

Silicon Dioxide (SiO2) with artificial dye

Dyed Agate

Chalcedony (SiO2)

Orange Calcite point

Calcite (Calcium Carbonate, CaCO3)

Quartz Druzy (Geode Fragment)

Silicon Dioxide (SiO2)