Mineral, Variety Of Chalcedony (Microcrystalline Quartz)

Agate (Plume/Moss variety)

Cryptocrystalline Quartz (SiO2) with iron/manganese inclusions

Ocean Jasper

SiO2, highly silicified rhyolite or spherulitic chalcedony

Tumbled brown agate

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

Tumbled orange chalcedony or carnelian

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

Tumbled jasper (likely red/brown jasper)

Microcrystalline quartz/chalcedony, SiO₂, colored by iron oxides

Jasper River Stone

Silicon Dioxide (SiO2) with iron oxide inclusions

Tumbled carnelian (likely reddish chalcedony)

Chalcedony, microcrystalline quartz (SiO₂), iron-oxide colored

Milky quartz pebble

Quartz (SiO₂), cryptocrystalline to coarse microcrystalline variety

Chalcedony (Agate / Quartz Pebble)

Silicon Dioxide (SiO2)

Yellow Jasper

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Jasper and Quartz Pebble

Silicon dioxide (SiO2) microcrystalline quartz variety

Tumbled chalcedony (likely carnelian or brown agate)

Microcrystalline quartz, SiO₂; chalcedony with iron-oxide coloration

Leopard Skin Jasper or Ring Jasper

Microcrystalline Quartz (Chalcedony with impurities)

White chalcedony (possibly milky quartz) cabochon

Chalcedony, microcrystalline SiO₂; appearance may also represent milky quartz or synthetic imitation

Yellow Jasper

Jasper (Silicon Dioxide, SiO2)

Blue-gray chalcedony (banded agate fragment)

Chalcedony, microcrystalline quartz (SiO₂), likely agate variety

Polished agate pendant (likely carnelian or plume agate)

Microcrystalline quartz, SiO₂ (chalcedony); exact variety cannot be confirmed from the image

Carnelian (orange chalcedony)

Chalcedony, microcrystalline quartz (SiO₂), iron-oxide colored

Yellow Jasper

Silicon Dioxide (SiO2) with iron hydroxides

Polished ocean jasper (orbicular jasper)

Silicified rhyolite, composed mainly of microcrystalline quartz (SiO₂)

Polished jasper pebble

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

Carnelian

SiO2 (Variety of Chalcedony/Quartz)

Jasper (brecciated or orbicular variety)

Silicon dioxide (SiO2) with iron oxide inclusions

Agate Geode

Silicon Dioxide (SiO2) - Chalcedony / Quartz Variety

Quartz (Agate/Chalcedony variety)

Silicon Dioxide (SiO2)

Brown botryoidal chalcedony (likely carnelian/agate)

Microcrystalline quartz, SiO₂ (chalcedony; iron-stained variety)

Polished brown agate pebble

Microcrystalline quartz (SiO₂), likely chalcedony/agate

Tumbled jasper or chert

Microcrystalline quartz (SiO₂), possibly iron-bearing jasper

Polished/tumbled jasper

Jasper, microcrystalline quartz (SiO₂) with iron-oxide and other mineral impurities

Red jasper (tumbled)

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

Flint or chert nodule

Microcrystalline quartz (chalcedony), SiO₂

Tumbled chalcedony or agate pebble

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

Jasper

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Red Jasper

Jasper (a variety of Chalcedony, SiO₂ with impurities)

Fancy Jasper

Silicon Dioxide (SiO2) with iron and organic inclusions

Tumbled banded jasper (probable)

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

Yellow Jasper

Silicon dioxide (SiO2)

Tumbled jasper or chalcedony

Microcrystalline quartz, SiO₂; likely opaque jasper with chalcedonic zones

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Polished agate or chalcedony nodule

Microcrystalline quartz (SiO₂), likely agate/chalcedony

Tumbled reddish-brown stone, possibly jasper or quartzite

Uncertain; likely microcrystalline quartz (SiO₂), potentially iron-stained jasper

Jasper (Green)

Silicon Dioxide (SiO2) with impurities