Mineral, Variety Of Chalcedony (Microcrystalline Quartz)

Polished pink-orange chalcedony (likely carnelian)

Microcrystalline quartz, SiO₂; carnelian is orange-red chalcedony

Polished jasper-like stone

Likely chalcedony (microcrystalline quartz, SiO₂), possibly brecciated jasper

Argetine Blue Agate (Chalcendony variant)

Silicon Dioxide (SiO₂)

Carnelian Agate

Silicon Dioxide (Chalcedony variety)

Polished brown jasper pebble

Microcrystalline quartz (SiO₂), commonly iron-oxide-rich jasper

Tumbled jasper

Microcrystalline quartz (SiO₂), colored by iron oxides and other impurities

Polished orbicular jasper (likely ocean jasper)

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

Rhyolitic jasper / brecciated jasper

Silica-rich volcanic rock, chiefly microcrystalline quartz (SiO₂), with iron-oxide and clay/mineral impurities

Bloodstone

Heliotrope

Polished orange agate (likely carnelian)

Chalcedony, microcrystalline quartz (SiO₂); orange-red variety commonly called carnelian

Chalcedony (likely agate)

Microcrystalline quartz, SiO₂; agate is banded chalcedony

Chrysoprase

Silicon dioxide with nickel impurities (SiO2 + Ni)

Green agate (polished bead)

Chalcedony, microcrystalline quartz (SiO₂)

Jasper

Chalcedony (SiO2)

Yellow chalcedony (likely tumbled quartz)

Chalcedony, cryptocrystalline SiO₂; possibly iron-stained quartz or yellow jasper

Tumbled jasper or chert

Microcrystalline quartz (SiO₂), likely iron-stained jasper

Tumbled yellow jasper or chert

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

Tumbled carnelian agate

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

Tumbled yellow quartz (likely citrine or yellow chalcedony)

Quartz, SiO₂; variety uncertain from image

Polished banded agate (likely carnelian agate)

Microcrystalline quartz, SiO₂ (chalcedony); iron-oxide coloring

Polished brown jasper

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

Chalcedony

Chalcedony (SiO2)

Tumbled jasper (likely brecciated or red jasper)

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

Red jasper (likely tumbled jasper/chert)

Microcrystalline quartz, SiO₂, colored red by iron oxides; exact identification from the photo is uncertain.

Polished red jasper beads

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

Tumbled orbicular jasper (probable)

Jasper, microcrystalline quartz (SiO₂), with iron- and clay-rich inclusions

Polished orbicular jasper (likely ocean jasper)

Jasper, a microcrystalline variety of quartz (SiO₂), with iron-oxide and other mineral inclusions

Gray chalcedony (microcrystalline quartz)

Chalcedony, SiO₂; likely common gray/blue-gray variety

Brecciated jasper/chert

Microcrystalline quartz (SiO₂), with iron-oxide and clay inclusions

Polished orbicular jasper (likely ocean jasper)

Silica-rich microcrystalline quartz/chalcedony, SiO₂; precise variety uncertain from the photo

Green tumbled agate (likely green chalcedony)

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

Carnelian

Chalcedony (SiO2)

Ocean Jasper

Spherulitic Chalcedony (SiO2)

Agate

Chalcedony (Microcrystalline Quartz) - SiO2

Tumbled chalcedony (likely agate or jasper)

Microcrystalline quartz, SiO₂ (chalcedony)

Jasper

Silicon dioxide (SiO2)

Polished orange jasper

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

Tumbled agate or chalcedony

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

Tumbled chalcedony or quartz pebble

Microcrystalline quartz, SiO₂ (likely chalcedony; exact identification requires testing)

Quartz (Chalcedony)

Silicon Dioxide (SiO2)

Polished agate (likely chalcedony)

Microcrystalline quartz, SiO₂; agate is banded chalcedony

Tumbled yellow jasper or iron-stained chert

Microcrystalline quartz (SiO₂), likely colored by iron oxides