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

Polished brecciated jasper

Microcrystalline quartz (SiO₂) with hematite/goethite and pale chalcedony or feldspar inclusions

Tumbled orange chalcedony or jasper

Microcrystalline quartz, SiO₂; likely iron-stained chalcedony/jasper

Iridescent chalcopyrite (“peacock ore”)

Chalcopyrite, CuFeS₂, commonly surface-oxidized to covellite and related copper sulfides

Tumbled hematite-rich ironstone

Hematite (Fe₂O₃), likely mixed with magnetite and iron-bearing silicates

Red jasper pebble

Jasper, microcrystalline quartz (SiO₂) colored by iron oxides

Likely polished black stone, possibly obsidian

Obsidian (volcanic glass; primarily SiO₂), tentative identification

Tumbled smoky quartz

Quartz, silicon dioxide (SiO₂), brown variety colored by irradiation and trace aluminum

Polished brecciated jasper (likely ribbon jasper)

Microcrystalline quartz/chalcedony (SiO₂) with iron-oxide inclusions

Iron-stained jasper (likely orbicular/brecciated jasper)

Microcrystalline quartz, SiO₂, colored by iron oxides/hydroxides

Iron-rich chert or jasper

Microcrystalline quartz (SiO₂), stained by hematite/goethite

Polished tiger iron

Tiger iron; interlayered hematite, jasper, and crocidolite-quartz (often riebeckite)

Polished jasper pebble

Microcrystalline quartz (SiO₂), commonly with iron-oxide inclusions

Tumbled jasper (likely ocean/picture jasper)

Microcrystalline quartz/chalcedony (SiO₂) with iron-oxide inclusions

Chalcedony (Jasper/Agate mix)

Quartz (microcrystalline SiO2)

Tumbled red jasper

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

Polished brown chalcedony (likely carnelian or jasper)

Microcrystalline quartz, SiO₂; iron oxides produce the brown coloration

Tumbled chalcopyrite (likely)

Chalcopyrite, CuFeS₂

Tumbled yellow jasper or serpentine

Jasper: microcrystalline quartz (SiO₂); possible serpentine: Mg₃Si₂O₅(OH)₄

Likely polished red-and-blue jasper (identification uncertain from the image)

Jasper, an opaque, microcrystalline variety of quartz (SiO₂)

Dyed druzy quartz geode

Quartz, silicon dioxide (SiO₂), likely artificially dyed

Dark river-worn cobble, possibly basalt or fine-grained volcanic rock

Likely basaltic rock; exact identification requires a fresh surface and tests

Tumbled jasper or chalcedony pebble

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

Small tumbled jasper or chert pebbles

Microcrystalline quartz (SiO₂), likely iron-oxide-bearing jasper/chalcedony

Chalcedony Geode Fragment

Silicon Dioxide (SiO2)

Vesicular basalt (likely scoria)

Basaltic scoria; predominantly plagioclase, pyroxene, and olivine in a mafic volcanic glass/microcrystalline matrix

Bornite (Peacock Ore)

Bornite (Cu5FeS4)

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Weathered copper-bearing rock, likely malachite-bearing matrix

Malachite (Cu₂CO₃(OH)₂) with iron-oxide-stained host rock; exact identification requires testing

Red Jasper

Silicon dioxide (SiO2) with iron oxide inclusions

Polished iron-rich meteorite (probable Sikhote-Alin-type iron meteorite)

Fe–Ni kamacite/taenite alloy, with possible troilite inclusions

Tumbled carnelian/chalcedony

Carnelian, orange-red microcrystalline quartz (SiO₂), a variety of chalcedony

Rainbow carborundum (silicon carbide)

Silicon carbide, SiC; commonly synthetic moissanite/carborundum specimen

Ceramic or Polished Stone Heart (Anthropogenic Material)

Glazed Ceramic (Silicon Dioxide based coating on Alumina Silicate body) or Polished Limestone/Marble (Calcium Carbonate, CaCO3)

Red Jasper

Jasper (Silicon Dioxide, SiO2)

Obsidian (likely black volcanic glass)

Obsidian; naturally occurring rhyolitic glass, primarily SiO₂

Polished iron-stained chert or jasper pebble

Microcrystalline quartz (SiO₂), likely ferruginous chert/jasper

Rounded gray stone, likely weathered chert or quartz-rich river pebble

Chert (microcrystalline SiO₂), tentative

Tumbled brown jasper (probable ocean jasper or iron-rich chert)

Microcrystalline quartz, SiO₂, with iron-oxide inclusions

Red jasper pebble

Microcrystalline quartz (SiO₂), colored chiefly by iron oxides

Tumbled yellow jasper

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

Riverstone Jasper (Chalcedony)

Silicon Dioxide (SiO2)

Polished brecciated jasper

Microcrystalline quartz (SiO₂), commonly with hematite/goethite and iron-rich alteration minerals