Mineral, Variety Of Chalcedony (Microcrystalline Quartz)

Brecciated jasper

Jasper (microcrystalline quartz, SiO₂), likely iron-oxide-rich breccia

Jasper

Chalcedony (SiO2)

Jasper

Silicon dioxide (SiO2)

Yellow jasper carving

Jasper, an opaque microcrystalline variety of quartz (SiO₂), shaped as a butterfly

Polished yellow chalcedony (likely lemon agate or yellow jasper)

Microcrystalline quartz, SiO₂

Jasper

Chalcedony (SiO2)

Brown chalcedony (likely agate)

Microcrystalline quartz, SiO₂; chalcedony, possibly banded agate

Tumbled brown chalcedony (likely carnelian/agatesque material)

Microcrystalline quartz, SiO₂; chalcedony variety

Tumbled Yellow Chalcedony / Iron-Stained Quartz

Silicon Dioxide (SiO2)

Orange-red jasper pebble

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

Tumbled orange chalcedony (likely carnelian)

Cryptocrystalline quartz, SiO₂; orange variety commonly called carnelian

Tumbled jasper or jasper-rich chert

Microcrystalline quartz (SiO₂) with iron-oxide impurities

Tumbled jasper or iron-rich chert

Microcrystalline quartz (SiO₂), likely colored by iron oxides

Chalcedony

Chalcedony (a microcrystalline variety of Quartz, SiO2)

Chalcedony with Quartz

Silicon Dioxide (SiO2)

Tumbled jasper (likely brecciated or red jasper)

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

Polished orange agate or chalcedony

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

Polished orbicular jasper (likely ocean jasper)

Silicified microcrystalline quartz (SiO₂), commonly called orbicular jasper or ocean jasper

Tumbled dark reddish-brown stone, possibly red jasper

Jasper, microcrystalline quartz (SiO₂), likely iron-oxide colored

Tumbled chalcedony (likely moss or gray agate)

Microcrystalline quartz, SiO₂; chalcedony/agate variety

Likely banded agate pebble

Microcrystalline quartz (chalcedony), SiO₂

Yellow Agate

Silicon Dioxide (SiO2)

Tumbled brown jasper or chalcedony

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

Polished banded agate

Microcrystalline quartz (SiO₂), chiefly chalcedony

Red jasper (probable)

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

Polished brown jasper (probable ocean jasper or iron-rich jasper)

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

Tumbled brown jasper

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

Chalcedony (likely agate/chert fragment)

Microcrystalline quartz, SiO₂

Red jasper (tumbled)

Microcrystalline quartz/chalcedony, SiO₂, colored chiefly by iron oxides

Tumbled chalcedony or quartz-rich chert

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

Tumbled/rounded agate (likely mossy or brecciated chalcedony)

Microcrystalline quartz, SiO₂ (chalcedony/agate)

Tumbled yellow chalcedony (probable)

Chalcedony, microcrystalline quartz (SiO₂), possibly iron-stained jasper

Tumbled orange chalcedony

Chalcedony (microcrystalline quartz, SiO₂), likely orange carnelian

Polished agate pebble

Banded chalcedony, a microcrystalline variety of quartz (SiO₂)

Quartz (Agate/Chalcedony)

Silicon Dioxide (SiO2)

Tumbled chalcedony (likely brown agate)

Chalcedony, microcrystalline quartz (SiO₂); possibly agate

Orange-pink chalcedony (likely carnelian/chalcedony rough)

Microcrystalline quartz, SiO₂; iron-oxide-bearing chalcedony

Polished red jasper

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

Polished brecciated jasper

Silica-rich microcrystalline quartz/chalcedony (SiO₂), with iron-oxide staining and angular mineral fragments

Tumbled brown jasper

Microcrystalline quartz (SiO₂), commonly with iron-oxide impurities

Tumbled red-brown stone, likely jasper

Jasper, microcrystalline quartz (SiO₂), probably iron-oxide-bearing chert

Chalcedony (probably agate or common quartz)

Microcrystalline quartz, SiO₂