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

Water-worn brown chert or jasper pebble

Microcrystalline quartz (SiO₂), likely ferruginous chert/jasper

Smoky quartz

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

Smoky Quartz

SiO2 (Silicon Dioxide with aluminum impurities)

Rounded limestone pebble

Micritic limestone, primarily calcite (CaCO₃)

Tumbled reddish jasper

Microcrystalline quartz (SiO₂), commonly colored by iron oxides

Moqui Marble (Shaman Stone)

Iron Oxide Concretion (Hematite/Goethite shell with Sandstone core)

Chert (Jasper)

Microcrystalline Quartz (SiO2)

Chert (Jasper)

Silicon Dioxide (SiO2)

Banded Jasper

Silicon Dioxide with Iron Oxide Inclusions (SiO2)

Jasper Pebble

Microcrystalline Quartz (Chalcedony), SiO2

Chert (Jasper)

Silicon Dioxide (SiO2)

Turquoise

Turquoise (CuAl6(PO4)4(OH)8·4H2O)

Cullet (Slag Glass)

Amorphous Silica (SiO2) with various metal oxide colorants

Red Jasper

Red Jasper (SiO2 with Hematite inclusions)

Banded Chert

Silicon Dioxide (SiO2)

Tumbled jasper or iron-stained chert

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

Dark fine-grained rock, likely basalt

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

Blue sea glass or blue glassy mineral fragment

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

Dyed Chalcedony (Agate)

Silicon Dioxide (SiO2)

Cullet (Slag Glass)

Amorphous Silica (Industrial byproduct)

Tumbled quartz pebble

Quartz (silicon dioxide, SiO₂), likely milky or smoky quartz

Jasper River Stone

Silicon Dioxide (SiO2) with iron oxide inclusions

Tumbled blue chalcedony (likely blue agate)

Microcrystalline quartz, SiO₂; chalcedony/agate variety

Tumbled milky quartz pebble

Quartz (silicon dioxide, SiO₂)

Aura Quartz (Pink/Rose Aura Quartz)

Silicon Dioxide (SiO2) bonded with Platinum and/or Silver

Brecciated Red Jasper

Microcrystalline Quartz (Chalcedony), SiO2

Black tumbled stone, likely basalt or black jasper

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

Chert (Yellow Jasper)

Silicon dioxide (SiO2) with iron oxide inclusions

Polished native copper

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

Vesicular volcanic rock, likely pumice or scoria

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

Red Jasper with Quartz Veining

Jasper (Silicon Dioxide, SiO2)

Peacock Ore (Bornite or Chalcopyrite)

Bornite (Cu₅FeS₄) or iridescent Chalcopyrite (CuFeS₂)

Red jasper pebble

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

Heat-Treated Citrine

Quartz (Silicon Dioxide, SiO2)

Snowflake obsidian cabochon

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

Polished dendritic jasper or agate

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

Jasper Pebble

Silicon dioxide (SiO2) with iron oxide impurities

Tumbled jasper or brecciated jasper

Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide and dark mineral inclusions

Tumbled blue-green stone, likely dyed agate

Agate (microcrystalline quartz, SiO₂); blue coloration may be artificial

Tumbled red-brown jasper

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

Tumbled chert or jasper pebble

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

Polished red jasper beads

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