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

Iron-rich jasper or weathered hematite-bearing rock

Ferruginous jasper, primarily microcrystalline quartz (SiO₂) with iron oxides such as hematite (Fe₂O₃) and goethite (FeO(OH))

Banded Chert

Silicon Dioxide (SiO2)

Chert (Jasper)

Microcrystalline Quartz (SiO2)

Red Jasper

Red Jasper (SiO2 with Hematite inclusions)

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Tumbled jasper or iron-stained chert

Microcrystalline quartz (SiO₂), likely jasper/chert with iron-oxide staining

Blue sea glass or blue glassy mineral fragment

Uncertain; likely man-made soda-lime glass, not a natural mineral

Polished red jasper beads

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

Polished ocean jasper (orbicular jasper)

Microcrystalline quartz/chalcedony with iron oxides and accessory minerals; SiO₂-dominant

Rounded limestone pebble

Micritic limestone, primarily calcite (CaCO₃)

Jasper River Stone

Silicon Dioxide (SiO2) with iron oxide inclusions

Blue Dyed Agate

Chalcedony (cryptocrystalline variety of Quartz), SiO2

Black tumbled stone, likely basalt or black jasper

Most consistent with fine-grained basalt (mainly plagioclase and pyroxene); exact identification requires testing

Brecciated Red Jasper

Microcrystalline Quartz (Chalcedony), SiO2

Dark fine-grained rock, likely basalt

Basalt; chiefly plagioclase feldspar and pyroxene, commonly with olivine and iron oxides

Vesicular volcanic rock, likely pumice or scoria

Pumice (highly vesicular rhyolitic–andesitic volcanic glass) or scoria (vesicular basaltic–andesitic rock)

Polished dendritic jasper or agate

Microcrystalline quartz (chalcedony), SiO₂, with iron/manganese oxide dendrites and earthy inclusions

Slag (Industrial Glassy Byproduct)

Ferro-silicate Slag

Chert (Jasper)

Silicon Dioxide (SiO2)

Tumbled blue chalcedony (likely blue agate)

Microcrystalline quartz, SiO₂; chalcedony/agate variety

Chert (Jasper)

Microcrystalline Quartz (SiO2)

Banded Jasper

Silicon Dioxide with Iron Oxide Inclusions (SiO2)

Jasper Pebble

Microcrystalline Quartz (Chalcedony), SiO2

Chert (Jasper)

Silicon Dioxide (SiO2)

Agate (Dyed Blue)

SiO2 (Silicon Dioxide)

Tumbled green stone, likely serpentine or green jasper

Probable serpentine-group mineral (Mg₃Si₂O₅(OH)₄) or microcrystalline quartz/chalcedony

Yellow Quartz (possibly dyed)

Silicon Dioxide (SiO2)

Polished native copper

Native copper (Cu), likely with cuprite/tenorite oxidation products

Likely rough garnet-bearing metamorphic rock

Garnet schist or garnet amphibolite; reddish areas may be almandine garnet (Fe₃Al₂Si₃O₁₂)

Tumbled red-brown jasper

Jasper, microcrystalline quartz (SiO₂) with iron-oxide impurities

Magnetic Hematite

Magnetized Hematite (an iron oxide mineral, Fe2O3, that has undergone magnetization)

Tumbled jasper or chert

Microcrystalline quartz (SiO₂), likely iron-stained jasper

Tumbled red jasper

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

Cullet (Slag Glass)

Amorphous Silica (SiO2) with various metal oxide colorants

Red jasper pebble

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

Snowflake obsidian cabochon

Obsidian (volcanic glass), SiO₂-rich; white areas are cristobalite/spherulitic devitrification

Chert (Yellow Jasper)

Silicon dioxide (SiO2) with iron oxide inclusions

Jasper Pebble

Silicon dioxide (SiO2) with iron oxide impurities

Tumbled brown stone, likely chert or jasper

Microcrystalline quartz (SiO₂), probable chert/jasper

Red Jasper with Quartz Veining

Jasper (Silicon Dioxide, SiO2)

Tumbled chert or jasper pebble

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

Red jasper pebble

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