Mineral (Variety Of Chalcedony)

Tumbled dendritic agate (likely)

Chalcedony, microcrystalline SiO₂, with dark manganese/iron-oxide inclusions

Tumbled agate or chalcedony (probable)

Microcrystalline quartz, SiO₂

Polished banded agate (likely carnelian and black agate)

Chalcedony, microcrystalline quartz (SiO₂), with iron-oxide coloration

Chalcedony (probably agate or common quartz)

Microcrystalline quartz, SiO₂

Tumbled brown chalcedony (likely smoky quartz or agate)

Chalcedony, microcrystalline SiO₂; exact variety cannot be confirmed visually

Banded Calcite (often sold as Orange Onyx or Mexican Onyx)

Calcium Carbonate (CaCO3)

Tumbled pale-yellow chalcedony (possibly yellow jasper)

Microcrystalline quartz, SiO₂; chalcedony/jasper varieties

Agate (Chalcedony)

Silicon Dioxide (SiO2)

Carnelian (Chalcedony)

Silicon Dioxide (SiO2)

Tumbled red jasper

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

Blue Chalcedony

Silicon Dioxide (SiO2)

Tumbled orange-and-white chalcedony

Chalcedony, microcrystalline quartz (SiO₂), likely orange carnelian/white agate variety

Brecciated jasper

Iron-oxide-rich jasper (microcrystalline quartz, SiO₂), cut by a quartz- or calcite-rich vein

Red jasper (possible polished or dyed stone)

Jasper, an opaque microcrystalline variety of quartz (SiO₂)

Black Onyx

Silicon Dioxide (SiO2)

Blue Lace Agate

Chalcedony (Silicon Dioxide, SiO2)

Red/orange chalcedony (carnelian), possibly dyed or heat-treated

Chalcedony, cryptocrystalline SiO₂ (quartz variety)

Tumbled jasper (likely brown jasper)

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

Agate

Chalcedony (Microcrystalline Quartz) - SiO2

Tumbled chalcedony (likely agate or jasper)

Microcrystalline quartz, SiO₂ (chalcedony)

Agate (Carnelian-like)

Chalcedony (Silicon Dioxide, SiO2)

Tumbled orange-brown jasper (likely)

Microcrystalline quartz, SiO₂; jasper is an iron-oxide-colored variety of chalcedony

Tumbled honey-brown chalcedony (likely common quartz)

Microcrystalline quartz, SiO₂; possibly iron-stained chalcedony or low-grade agate

Polished agate/jasper pebble

Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide staining

Tumbled chalcedony (likely carnelian or common agate)

Microcrystalline quartz, SiO₂; chalcedony variety

Red Jasper

Jasper (Silicate mineral - SiO2)

Chalcedony (likely common agate)

Microcrystalline quartz, SiO₂; chalcedony variety, possibly agate

Jasper

Silicon dioxide (Microcrystalline Quartz, SiO2)

Tumbled agate or chalcedony pebble

Microcrystalline quartz (SiO₂), likely agate/chalcedony

Orange chalcedony (possibly carnelian)

Microcrystalline quartz, SiO₂; iron-oxide-bearing chalcedony

Honey/brown agate (chalcedony)

Microcrystalline quartz, SiO₂; likely translucent agate or chalcedony

Jasper and Agate (Polished Pebble)

Chalcedony (SiO2 with impurities)

Polished orange jasper

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

Chalcedony

Silicon Dioxide (SiO2)

Carnelian

Carnelian (SiO2)

Agate

Silicon Dioxide (SiO2)

Polished brown jasper (likely brecciated or orbicular jasper)

Microcrystalline quartz/chalcedony, SiO₂, colored by iron oxides and other inclusions

Chalcedony (Agate/Chert variety)

Silicon Dioxide (SiO2)

Agate

Agate (Silicon Dioxide, SiO2)

Banded Agate

Agate (Silicon Dioxide - SiO2)

Banded Agate (specifically Carnelian Agate color)

Silicon Dioxide (SiO2) - variety of Chalcedony

Carnelian

Chalcedony (SiO2)