Mineral (Variety Of Chalcedony)

Red Jasper

Silicon Dioxide with Iron Oxide inclusions (SiO2 + Fe2O3)

Chrysoprase

Chalcedony (Silicon Dioxide, SiO2), flavored by Nickel

Tumbled banded calcite (often sold as Mexican onyx or banded onyx)

Calcite, CaCO₃; banded travertine/calcite, not true onyx

Polished orbicular agate (likely ocean jasper)

Microcrystalline quartz, SiO₂; chalcedony with orbicular patterns and possible mineral inclusions

Likely brown rough agate (chalcedony)

Chalcedony, microcrystalline quartz (SiO₂); exact identification is uncertain from the photo

Polished brown jasper (likely iron-rich jasper)

Jasper, an opaque microcrystalline variety of quartz (SiO₂)

Water-worn agate (chalcedony) pebble

Microcrystalline quartz, SiO₂; likely agate/chalcedony

Yellow Jasper

Silicon dioxide (Microcrystalline quartz, SiO2)

Jasper with Quartz

Silicon dioxide (SiO2)

Jasper

Silicon dioxide (SiO2)

Tumbled chalcedony or quartz fragment

Microcrystalline quartz, SiO₂ (probable chalcedony)

Agate (or Quartz with Agate banding)

Silicon dioxide (SiO2)

Agate

SiO2

Yellow Jasper

Silicon dioxide, SiO2

Plume Agate or Moss Agate

Agate (SiO2)

Tumbled amber-colored quartz/chalcedony (likely carnelian or honey agate)

Microcrystalline quartz, SiO₂; coloration may derive from iron oxides

Tumbled brown jasper (likely brecciated jasper)

Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide and other mineral inclusions

Tumbled Dalmatian stone (Dalmatian jasper)

Trade name; commonly a leucocratic igneous rock with dark aegirine/arfvedsonite-group inclusions, often sold as “Dalmatian jasper”

Tumbled carnelian (orange chalcedony)

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

Tumbled brown chalcedony/jasper

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

Tumbled Yellow Chalcedony / Iron-Stained Quartz

Silicon Dioxide (SiO2)

Chalcedony

Silicon dioxide (SiO2) - Microcrystalline quartz

Red jasper (likely tumbled)

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

Yellow Jasper

Silicon dioxide (SiO2)

Ocean Jasper (Orbicular Jasper)

Silicon Dioxide (SiO2) with various inclusions

Likely tumbled brown agate

Microcrystalline quartz (SiO₂), variety chalcedony; identification is tentative from the image

Polished brown agate or chalcedony pendant

Microcrystalline quartz (SiO₂), likely brown chalcedony/agate

Banded calcite (possibly onyx marble)

Calcite, CaCO₃; banded decorative calcite commonly sold as “onyx”

Tumbled banded agate (likely carnelian agate)

Microcrystalline quartz, SiO₂; chalcedony with iron-oxide coloring

Polished agate pebble

Chalcedony (microcrystalline quartz, SiO₂), likely agate

Orange chalcedony (possibly carnelian)

Microcrystalline quartz, SiO₂; orange chalcedony is commonly called carnelian

Likely banded agate pebble

Microcrystalline quartz (chalcedony), SiO₂

Tumbled banded jasper (likely)

Microcrystalline quartz/chalcedony, SiO₂, colored by iron oxides; exact variety uncertain from the photo

Polished yellow-brown agate (likely carnelian or chalcedony)

Microcrystalline quartz, SiO₂; chalcedony with iron-oxide coloration

Agate

SiO2

Jasper

SiO2

Carnelian

Carnelian (Silicon Dioxide - SiO2)

Blue chalcedony (polished cabochon)

Microcrystalline quartz, SiO₂; chalcedony variety

Blue Lace Agate

Chalcedony (SiO2)

Banded agate (agate nodule slice)

Agate, a banded variety of microcrystalline quartz; SiO₂

Rough agate (chalcedony)

Microcrystalline quartz, SiO₂; likely translucent orange-brown chalcedony, possibly iron-stained

Yellow jasper (likely polished/tumbled)

Microcrystalline quartz, SiO₂, colored by iron oxides; identification is visual and not definitive.