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

Dyed Agate (Tumbled)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Fossiliferous limestone

Calcitic limestone, predominantly CaCO₃ (calcite), with possible shell or coral fossils

Rounded metallic-looking pebble, likely iron-rich rock or slag

Uncertain; possible limonite/goethite-rich ironstone, hematite-bearing material, or industrial slag

Rainbow Hematite (Titanium-Coated Hematite)

Titanium-treated Hematite (Fe2O3)

Dalmation Stone (Dyed)

Peralkaline rhyolite

Dyed Agate Slice

Microcrystalline Quartz (SiO2) with artificial pigment

Dragon Vein Agate

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

Painted River Pebble (likely Basalt or Greywacke)

Aphanitic Lithic Clast with Anthropogenic Pigment coating

Orange Quartz (or Citrine Quartz)

Silicon Dioxide (SiO2)

Dyed Agate

SiO2 (Silicon Dioxide)

Tumbled iron-rich stone, possibly jasper or weathered basalt

Indeterminate; likely iron-stained microcrystalline quartz (jasper) or altered basalt

Red Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with Fe2O3 inclusions)

Pink Anthracite Coal (dyed)

Anthracite Coal (Artificially Colored)

Dyed Quartz (imitating Emerald/Green Quartz)

Silicon Dioxide (SiO2) with artificial pigment

Weathered concrete or cementitious slab (not natural rock)

Artificial calcium-silicate cement composite; likely Portland cement concrete

Tumbled blue stone, likely blue aventurine or dyed chalcedony

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

Dyed Chalcedony (Agate)

Silicon Dioxide (SiO2) with artificial pigment

Likely vertebra fossil or bone fragment

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

Dyed Agate / Quartz (Tumbled)

Silicon Dioxide (SiO2) with artificial dye

Dyed Blue Agate Slice

Silicon Dioxide (SiO2)

Blue Quartz (Dyed)

Silicon Dioxide (SiO2) with artificial pigment

Dyed Quartzite

Tumbled Metamorphosed Quartz (SiO2) with artificial pigment

Aqua Aura Quartz

Titanium/Gold-coated Silicon Dioxide (SiO2)

Pink Dyed Agate

Silicon Dioxide (SiO2) with synthetic pigment

Polished druzy quartz specimen

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

Polished jasper (likely brecciated or iron-rich jasper)

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

Man-made Dyed Aura Quartz

Silicon Dioxide (SiO2) with metallic coating/dye

Aura Quartz

Silicon Dioxide (SiO2) with Titanium/Metal vapor coating

Iron-rich concretion or slag-like rock

Goethite–hematite limonite concretion, possibly iron slag

Iron-rich slag or limonite-bearing rock

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

Dyed Quartz Crystals

Silicon Dioxide (SiO2) with artificial pigment

Beads (likely glass or man-made material)

N/A (artificial material)

Blue Dyed Agate Slice

Silicon Dioxide (SiO2) with artificial pigment

Tumbled basalt (likely)

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

Dyed Pink Agate

Silicon Dioxide (SiO2) - variety Chalcedony

Yellow Quartz

SiO2 (Silicon Dioxide)

Slag

Ferrous Slag (Amorphous calcium-magnesium-aluminum silicates)

Dyed Crackle Quartz

Silicon Dioxide (SiO2) with artificial dye

Blue-dyed tumbled stone, likely calcite or quartz

Uncertain; commonly dyed quartz (SiO₂) or calcite (CaCO₃)

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

Red Tigers Eye (Bull's Eye)

SiO2