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

Dyed Agate

SiO2 (Silicon Dioxide)

Magenta Tiger's Eye

Silicon dioxide with crocidolite inclusions (SiO2), dyed

Clear Quartz Sphere

Crystalline Silicon Dioxide (SiO2)

Pink Tumbled Agate

Silicon Dioxide (SiO2) with dye

Blue Agate Geode (Dyed)

Cryptocrystalline Quartz (SiO2)

Botryoidal hematite-rich iron ore (probable)

Hematite, Fe₂O₃, possibly mixed with goethite/limonite

Dragon Vein Agate

Silicon Dioxide (SiO2) - Chalcedony variety

Iridescent coated quartz (likely synthetic/display gemstone)

Quartz, silicon dioxide (SiO₂), likely faceted and surface-coated; exact material cannot be confirmed visually

Dyed Agate

Silicon Dioxide (SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Dyed Blue Agate

Silicon dioxide (SiO2)

Red jasper (possible polished or dyed stone)

Jasper, an opaque microcrystalline variety of quartz (SiO₂)

Polished picture jasper heart pendant

Picture jasper (microcrystalline quartz, SiO₂, with iron-oxide and clay inclusions)

Tumbled blue glassy mineral, possibly sodalite or blue aventurine

Identification uncertain; likely sodalite (Na₈Al₆Si₆O₂₄Cl₂) or blue-dyed quartz/slag-like material

Weathered dark mineral/rock fragment

Indeterminate; possibly iron-rich basalt, slag, or a sulfide-bearing mineral

Sandstone with Liesegang Rings

Quartzose Sandstone with Iron Oxide Precipitation

Amethyst geode slices

Amethyst, purple quartz (SiO₂)

Slag Glass

Amorphous Silicate (Man-made)

Blue Crackle Quartz (Dyed Fire Agate/Quartz)

Silicon Dioxide (SiO2) with artificial dye treatment

Hag Stone (Quartz Pebble with Natural Hole)

Quartz (Silicon Dioxide - SiO2)

Quartz (Tumbled)

SiO2 (Silicon Dioxide)

Dyed Agate

Silicon Dioxide (SiO2) with artificial pigment

Dyed and polished agate slice

Agate, a banded microcrystalline variety of chalcedony (SiO₂), commonly quartz with minor impurities

Likely iron-rich chert or jasper

Microcrystalline quartz (SiO₂), variably stained by iron oxides/hydroxides

Blue Howlite

Dyed Howlite (Ca2B5SiO9(OH)5)

Smoky Quartz

Silicon Dioxide (SiO2)

Black onyx or black agate bead necklace

Microcrystalline quartz, SiO₂ (likely chalcedony/black agate; possibly dyed)

Tumbled milky quartz pebble

Quartz (silicon dioxide, SiO₂), opaque-to-translucent milky variety

Pink Dyed Agate

Silicon Dioxide (SiO2) - Variety Agate

Limonite and Goethite (Ironstone)

Hydrous Iron Oxide Mixture (FeO(OH)·nH2O)

Red Tiger's Eye

Silicified Crocidolite (Quartz pseudo-morph after Crocidolite), SiO2

Red sandstone pebble

Quartz-rich sandstone, commonly ferruginous sandstone (SiO₂-dominated)

Possible weathered iron-rich rock or slag fragment

Indeterminate; likely limonite/goethite-bearing material, possibly iron slag

Tumbled yellow calcite

Calcite (CaCO₃), likely honey/yellow calcite

Possible basalt or industrial iron-rich slag

Basalt (plagioclase–pyroxene rock); identification uncertain from image

Rainbow Quartz (Dyed/Coated Quartz)

Silicon Dioxide (SiO2) with artificial color enhancement

Iron-rich chert or jasper

Microcrystalline quartz (SiO₂), colored by iron oxides/hydroxides

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

Silicon Dioxide (SiO2) with artificial dye

Vesicular basalt (likely weathered lava rock)

Basalt; fine-grained mafic volcanic rock composed chiefly of plagioclase, pyroxene, and commonly olivine

Mixed rock and mineral collection

Multiple specimens; visible pieces may include quartz, calcite, agate/chalcedony, jasper, and dyed or coated materials

Smoky Quartz

Silicon Dioxide (SiO2)

Chert (likely flint-bearing chert)

Microcrystalline quartz, SiO₂ (chalcedony/quartz aggregate)