Sedimentary (If Natural Jasper) Or Artificial (If Slag)

Dyed Agate / Quartz (Tumbled)

Silicon Dioxide (SiO2) with artificial dye

Dyed Quartz Cube

Silicon Dioxide (SiO2)

Dyed Pink Agate Slice

Cryptocrystalline variety of Quartz (SiO2)

Dragon Vein Agate

Silicon dioxide / Chalcedony (with heat/dye treatment) SiO2

Blue Quartz (Dyed)

Silicon Dioxide (SiO2) with artificial pigment

Rainbow Hematite (Titanium-Coated Hematite)

Titanium-treated Hematite (Fe2O3)

Titanium Coated Agate Geode

Silicon Dioxide (SiO2) with metallic vapor coating

Tumbled blue stone, likely blue aventurine or dyed chalcedony

Aventurine quartz (SiO₂) or chalcedony (microcrystalline SiO₂); exact identification requires testing

Dyed Quartzite

Tumbled Metamorphosed Quartz (SiO2) with artificial pigment

Polished jasper (likely brecciated or iron-rich jasper)

Microcrystalline quartz (SiO₂), colored by iron oxides/hydroxides and possibly sulfide minerals

Red Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with Fe2O3 inclusions)

Slag

Ferrous Slag (Amorphous calcium-magnesium-aluminum silicates)

Likely vertebra fossil or bone fragment

Indeterminate fossilized vertebra; mineralized hydroxyapatite, commonly Ca₅(PO₄)₃(OH)

Dyed Purple Agate

Silicon Dioxide (Chalcedony with artificial dye)

Dyed Blue Agate Slice

Silicon Dioxide (SiO2)

Iron-rich concretion or slag-like rock

Goethite–hematite limonite concretion, possibly iron slag

Aqua Aura Quartz

Titanium/Gold-coated Silicon Dioxide (SiO2)

Blue Agate

Chalcedony (SiO2)

Dyed pink howlite (tumbled stone)

Howlite, Ca₂B₅SiO₉(OH)₅; likely dyed to imitate pink turquoise or rhodonite

Pink Dyed Agate

Silicon Dioxide (SiO2) with synthetic pigment

Aura Quartz

Silicon Dioxide (SiO2) with Titanium/Metal vapor coating

Polished druzy quartz specimen

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

Tiger's Eye Beads

Silicon dioxide with crocidolite inclusions (SiO2)

Iron-rich slag or limonite-bearing rock

Hydrated iron oxides, chiefly limonite/goethite (FeO(OH)·nH₂O); possibly industrial iron slag

Beads (likely glass or man-made material)

N/A (artificial material)

Blue Dyed Agate Slice

Silicon Dioxide (SiO2) with artificial pigment

Dyed Quartz Crystals

Silicon Dioxide (SiO2) with artificial pigment

Dyed Crackle Quartz

Silicon Dioxide (SiO2) with artificial dye

Slag Glass

Silicon dioxide with impurities

Blue Diamond

Carbon with Boron impurities (C)

Tumbled basalt (likely)

Basalt; fine-grained mafic volcanic rock composed mainly of plagioclase feldspar and pyroxene, often with minor olivine and iron oxides

Concrete Paver (Artificial Cementitious Rock)

Hydrated Portland Cement Aggregate

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

Silicon Dioxide (SiO2) with artificial pigment

Man-made Dyed Aura Quartz

Silicon Dioxide (SiO2) with metallic coating/dye

Purple Tiger's Eye

Silicon dioxide with crocidolite inclusions (SiO2)

Dyed Quartz (Candy Quartz / Aura Quartz Imitation)

Silicon Dioxide (SiO2)

Red Slag Glass

Amorphous Silica (Industrial byproduct with metallic oxide dopants)

Dyed Pink Agate

Silicon Dioxide (SiO2) - variety Chalcedony

Blue Dyed Quartzite

Silicon Dioxide (SiO2) with artificial pigment

Tumbled chalcedony or quartz fragment

Microcrystalline quartz, SiO₂ (probable chalcedony)

Dyed Quartz Geode

Silicon Dioxide (SiO2) with artificial pigment

Iron-rich chert or jasper

Microcrystalline quartz (SiO₂), colored by hematite/goethite inclusions