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

Dyed Howlite (Dyed Red)

Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)

Tumbled yellow jasper

Microcrystalline quartz (chalcedony), SiO₂, colored by iron oxides

Orbicular jasper (likely ocean jasper)

Silica-rich chert/jasper, primarily microcrystalline quartz (SiO₂)

Polished carnelian or red jasper

Cryptocrystalline quartz (chalcedony), SiO₂; possibly iron-rich jasper

Obsidian (likely black obsidian)

Volcanic glass; chiefly silica-rich rhyolitic composition, approximately SiO₂ 70–75%

Dyed or coated quartz/amethyst specimen (likely)

Quartz, SiO₂; purple portion may be amethyst, iron-bearing quartz

Weathered vesicular volcanic rock, likely scoria

Scoria; composition commonly basaltic to andesitic

Smoky Quartz

SiO2 (Silicon Dioxide)

Dyed Agate / Painted Stone

Silicon Dioxide (SiO2) with artificial pigment

Jasper Breccia

Brecciated Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)

Purple Agate (Dyed Chalcedony)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Slag Glass (Cullet)

Amorphous Silica / Glass residue

Red Jade (Dyed Quartzite)

Silicon Dioxide (SiO2) - variety Quartzite

Leopard jasper (orbicular jasper)

Silicified volcanic tuff/chert; predominantly microcrystalline quartz (SiO₂) with iron oxides and volcanic minerals

Ruby in Zoisite (Anyolite) or possibly a dyed stone/agate

Anyolite (Ruby in green zoisite) or artificially altered chalcedony

Tumbled brown chert or jasper

Microcrystalline quartz (SiO₂), likely iron-stained chert/jasper

Blue Goldstone

Synthetic Avanturine Glass (or Aventurine Glass)

Black Agate

Chalcedony (SiO2)

Red Swirl Beads (Likely Resin or Glass, simulating Red Jasper or Agate)

N/A (for the beads as pictured); Red Jasper: SiO2 (Chert variety); Red Agate: SiO2 (Chalcedony variety)

Polished black stone, likely black jasper or basalt

Microcrystalline quartz (SiO₂) if jasper; alternatively fine-grained basalt

Small tumbled brown stone, likely iron-stained quartz or jasper

Quartz (SiO₂) or microcrystalline quartz (chalcedony/jasper), identification uncertain from the image

Blue chalcedony crystal pendant

Chalcedony, microcrystalline quartz (SiO₂), likely blue chalcedony or dyed quartz

Small rounded pebble, likely weathered sandstone or iron-stained sedimentary rock

Indeterminate; probable quartz-rich sandstone (SiO₂ with clay/iron-oxide cement)

Pink Quartz (likely dyed)

Silicon Dioxide (SiO2)

Possible basalt or volcanic scoria fragment

Mafic volcanic rock, likely basalt; exact identification is uncertain from the photograph

Chert (specifically Blue Chert/Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Possible chalcopyrite-bearing sulfide fragment

Likely chalcopyrite (CuFeS₂), possibly with pyrite or bornite

Polychrome Jasper

Silicon Dioxide (SiO2) with iron and other mineral inclusions

Likely tumbled yellow jasper or iron-rich chert

Microcrystalline quartz (SiO₂), colored by iron oxides

Tumbled quartz crystal (likely smoky or iron-stained quartz)

Quartz, silicon dioxide (SiO₂)

Bornite (Peacock Ore)

Bornite (Cu5FeS4)

Likely vesicular basalt

Basalt, a fine-grained mafic volcanic rock composed mainly of plagioclase, pyroxene, and sometimes olivine

Blue Agate (likely dyed)

Silicon Dioxide (SiO2)

Unidentified purple mineral fragment

Possibly amethyst (quartz), but the image is insufficient for confident identification

Crackle Agate / Dyed Agate

Agate (Silicon dioxide / SiO2)

Dyed Agate

Microcrystalline Quartz (SiO2) with artificial pigment

Tumbled jasper (likely brecciated or leopard jasper)

Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide inclusions

Smoky Quartz

SiO2 (Silicon Dioxide with aluminum impurities)

Dyed Dalmatian Jasper (Dalmatian Stone)

Perthitic Feldspar with Arfvedsonite inclusions

Smoky quartz

Quartz, silicon dioxide (SiO₂), brown to gray variety

Blue-green peacock chalcopyrite

Chalcopyrite, CuFeS₂, artificially oxidized/iridescent-coated

Brecciated jasper with quartz/chalcedony

Jasper (microcrystalline quartz, SiO₂), with chalcedony and iron-oxide matrix