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

Polished orbicular jasper or rhyolitic jasper

Silica-rich microcrystalline quartz/chalcedony (SiO₂), likely jasper with contrasting mineral veins

Jasper and Quartz Breccia

Silicon dioxide with iron oxide inclusions (SiO2)

Trilobite Fossil (Flexicalymene)

Flexicalymene ouzregui

Blue Topaz

Al2SiO4(F,OH)2

Dark rounded pebble, possibly basalt

Basalt (fine-grained mafic volcanic rock; identification tentative from photograph)

Iron-rich basalt or weathered ironstone

Basalt, likely variolitic/vesicular and coated with iron oxides; composition mainly plagioclase, pyroxene, and magnetite/hematite

Iron-rich vesicular rock, possibly weathered scoria or ironstone

Likely oxidized basaltic scoria (Fe-oxide-bearing volcanic rock); exact identification requires testing

Dyed Blue Agate

Silicon dioxide (SiO2) with artificial pigment

Crackled Quartz (Dyed)

Silicon Dioxide (SiO2)

Tumbled dark green stone, likely serpentine or greenstone

Serpentinite (hydrated magnesium silicate minerals, chiefly antigorite/lizardite); possible chlorite-rich greenstone

Blue tumbled glass-like specimen; likely blue slag glass

Likely man-made glass (silicate glass), not a natural mineral; exact material cannot be confirmed from the image

Jasper

Microcrystalline Quartz (SiO2)

Tumbled gabbro or basalt

Dark mafic igneous rock, likely gabbro (plutonic) or basalt (volcanic), composed mainly of plagioclase and pyroxene

Weathered vesicular volcanic rock (likely pumice/tuff)

Porous volcanic pyroclastic rock, probably pumiceous tuff; exact identification requires testing

Vesicular basalt (scoriaceous basalt)

Basalt, chiefly plagioclase feldspar and pyroxene with minor olivine; vesicles formed by trapped volcanic gas

Likely basaltic rock fragment

Fine-grained mafic igneous rock, probably basalt (plagioclase–pyroxene ± olivine)

Carved smoky quartz (likely)

Quartz, silicon dioxide (SiO₂), smoky variety

Picture jasper pendant

Silicified sedimentary jasper, chiefly microcrystalline quartz (SiO₂) with iron-oxide and other mineral inclusions

Red jasper (likely brecciated or iron-stained jasper)

Jasper, microcrystalline quartz (SiO₂), colored chiefly by iron oxides

Iron-rich slag or weathered ironstone fragments

Probably hematite–goethite material; possibly industrial iron slag (Fe₂O₃/FeO(OH))

Slag Glass (Cullet)

Amorphous Silica / Glass residue

Tumbled jasper (likely picture jasper or iron-rich jasper)

Microcrystalline quartz/chalcedony, SiO₂, colored by iron oxides

Possible weathered basalt or iron-rich slag

Basalt, tentatively; composition likely plagioclase and pyroxene with possible magnetite

Synthetic Resin (Artificial Specimen)

Polyurethane or Polyester Resin

Blue-green glassy mineral specimen, possibly chalcedony or slag glass

Uncertain; candidate minerals include chrysocolla-bearing chalcedony or copper-bearing glassy slag

Citrine (Iron-stained Quartz)

Silicon Dioxide (SiO2)

Peacock Ore

Bornite (Cu5FeS4) with artificially induced tarnish

Orbicular jasper (likely ocean jasper)

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

Scoria (vesicular volcanic rock)

Basaltic scoria; chiefly plagioclase, pyroxene, olivine, and volcanic glass

Jasper / Chert (river tumbled)

Microcrystalline Quartz (SiO2)

Dyed Agate / Painted Stone

Silicon Dioxide (SiO2) with artificial pigment

Polished brown jasper pebble

Jasper, an opaque microcrystalline variety of chalcedony (SiO₂), colored by iron oxides

Dyed Agate

Silicon Dioxide (SiO2) - Chalcedony variety

Mystic Topaz

Al2SiO4(F,OH)2 (Coated)

Dyed Howlite

Borosilicate hydroxide (Ca2B5SiO9(OH)5)

Dyed Agate Slice

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Smoky Quartz

Smoky Quartz (SiO2)

Mixed polished river stones

Likely quartz, quartzite, chert/jasper, and possibly limestone or marble

Heat-Treated Amethyst (Commercial Citrine)

Silicon Dioxide (SiO2) with iron impurities

Jasper Breccia

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

Peacock ore

Iridescent chalcopyrite, commonly marketed as bornite

Leopard jasper (orbicular jasper)

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