Sedimentary Rock (Technically A Variety Of Chalcedony)

Polished orange chalcedony or carnelian

Microcrystalline quartz (SiO₂), commonly called carnelian when orange-red

Dark gray flint or chert fragment

Microcrystalline quartz (SiO₂), commonly with minor chalcedony and impurities

Dalmatian jasper

Dalmatian stone; commonly a leucocratic alkali-feldspar-rich igneous rock with arfvedsonite or aegirine inclusions

Tumbled agate/chalcedony

Microcrystalline quartz (SiO₂), likely banded chalcedony or agate

Tumbled orange chalcedony (likely carnelian)

Microcrystalline quartz, SiO₂; iron-bearing variety commonly termed carnelian

Chert (Chalcedony/Agate variety)

Silicon Dioxide (SiO2)

Carnelian (reddish chalcedony) with iron-stained host rock

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

Chert (Chert Nodule)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Polished orbicular jasper (likely ocean jasper)

Silicified microcrystalline quartz (SiO₂), with iron-oxide and other mineral inclusions; exact variety cannot be confirmed from the image

Red Jasper (Polished)

SiO2 (Silicon Dioxide) with Iron Oxide inclusions

Jasper

Silicon Dioxide (SiO2)

Tumbled agate or chalcedony pebble

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

Bauxite

Bauxite (Aluminum Ore)

Jasper

Silicon dioxide (SiO2) with impurities

Tumbled carnelian

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

Tumbled pink chalcedony (likely pink agate)

Chalcedony, microcrystalline SiO₂; variety of quartz

Polished carnelian/chalcedony

Microcrystalline quartz (SiO₂), likely iron-stained chalcedony

Blue Lace Agate

Chalcedony (SiO2)

Kambaba Jasper (Crocodile Jasper)

Stromatolitic Rhyolite/Jasper (SiO2)

Tumbled jasper or iron-rich chert

Microcrystalline quartz (SiO₂) with iron-oxide inclusions

Carnelian

Carnelian (SiO2)

Fancy Jasper (Agate/Chert mix)

Silicon Dioxide (SiO2) with various inclusions

Red Jasper

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Jasper

Silicon Dioxide (SiO2)

Carnelian Ring

SiO2 (Variety of Chalcedony)

Bauxite (Laterite)

Hydrated aluminum oxides (Al2O3·nH2O)

Yellow Chalcedony (Carnelian / Agate Pebbles)

Silicon Dioxide (SiO2)

Jasper (specifically Polychrome or Desert Jasper)

Silicon Dioxide (SiO2) with iron oxide and other mineral impurities

Jasper (Zebra Jasper)

Silicon Dioxide (SiO2) with impurities

Tumbled carnelian (red-orange chalcedony)

Microcrystalline quartz, SiO₂; chalcedony colored mainly by iron oxides

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Dendritic agate or included chalcedony (likely tumbled)

Microcrystalline quartz, SiO₂; inclusions likely manganese-oxide dendrites or iron minerals

Ocean Jasper (Orbicular Jasper)

Silicon Dioxide (SiO2) with various inclusions

Weathered chert or chalcedony nodule

Microcrystalline quartz (SiO₂), possibly silicified limestone or agate-like chalcedony

Small polished white pebble, possibly quartz or chalcedony

Likely microcrystalline quartz (SiO₂), but the image is insufficient for confident identification

Tumbled blue-gray stone, likely quartzite or chalcedony

Quartz-rich rock; predominantly microcrystalline or granular SiO₂, identification uncertain from image

Yellow Quartz / Chalcedony

Silicon Dioxide (SiO2)

Polished brown agate/chalcedony

Microcrystalline quartz (SiO₂), likely brown chalcedony or agate

Chalcedony (Botryoidal)

Silicon Dioxide (SiO2)

Rainbow Moonstone

White Labradorite (Plagioclase Feldspar), (Na,Ca)(Al,Si)4O8

Jasper (with Agate/Chalcedony inclusions)

Silicon Dioxide (SiO2)

Tumbled brown chalcedony or agate

Microcrystalline quartz, SiO₂ (likely chalcedony; banding is not visible)