Mineral (Variety Of Chalcedony)

Tumbled brown jasper

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

Orca Agate (Chalcedony)

Silicon Dioxide (SiO2) with inclusions

Tumbled carnelian (likely)

Carnelian, orange-red variety of cryptocrystalline silica (SiO₂), chalcedony

Chalcedony

Silicon Dioxide (SiO2)

Grey Chalcedony

Silicon Dioxide (SiO2)

Tumbled brown jasper

Microcrystalline quartz/chalcedony (SiO₂), commonly iron-stained

Tumbled brown jasper

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

Polished agate/jasper pebble (probable)

Microcrystalline quartz, SiO₂, with iron-oxide and other inclusions

Polished brown jasper (likely orbicular or brecciated jasper)

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

Tumbled jasper or iron-rich chert

Microcrystalline quartz (SiO₂) with iron-oxide inclusions

Polished red jasper pebble

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

Polished brown jasper (likely ocean or brecciated jasper)

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

Red jasper

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

Carnelian (orange chalcedony)

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

Tumbled carnelian (likely chalcedony)

Carnelian, orange-red cryptocrystalline quartz (SiO₂), a variety of chalcedony

Jasper (Iron-rich Chalcedony)

Jasper (Microcrystalline Silicon Dioxide, SiO2 plus iron oxide impurities)

Agate

Silicon dioxide (SiO2)

Tumbled blue chalcedony (probable)

Chalcedony, microcrystalline quartz (SiO₂), possibly blue quartz or dyed chalcedony

Polished jasper pebble, likely ocean or brecciated jasper

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

Tumbled brown jasper

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

Tumbled yellow-orange jasper

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

Tumbled yellow jasper (likely iron-stained chalcedony)

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

Red jasper (probable polished chalcedony/jasper)

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

Red jasper (likely brecciated or orbicular jasper)

Microcrystalline quartz, SiO₂, colored mainly by iron oxides

Brecciated jasper (likely ocean jasper or red jasper)

Microcrystalline quartz, SiO₂, with iron-oxide pigments and breccia cement

Polished blue banded agate slice

Chalcedony (microcrystalline quartz), SiO₂, commonly with trace iron and other coloring elements

Agate (Plume/Moss variety)

Cryptocrystalline Quartz (SiO2) with iron/manganese inclusions

Carnelian (orange-red chalcedony)

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

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide impurities

Polished carnelian/chalcedony

Microcrystalline quartz (SiO₂), likely iron-stained chalcedony

Tumbled carnelian

Cryptocrystalline quartz (chalcedony), SiO₂, colored mainly by iron oxides

Orange tumbled carnelian (likely)

Cryptocrystalline chalcedony, SiO₂; orange color commonly caused by iron oxides

Tumbled carnelian or orange chalcedony

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

Tumbled brown chalcedony or agate

Microcrystalline quartz, SiO₂ (likely chalcedony; banding is not visible)

Black Onyx

Silicon Dioxide (SiO2)

Yellow Jasper

Silicon Dioxide (SiO2) with iron hydroxides (Goethite/Limonite)

Tumbled brown jasper (likely orbicular or brecciated jasper)

Jasper, microcrystalline quartz/chalcedony; SiO₂

Red jasper

Microcrystalline quartz (SiO₂), commonly colored by iron oxides

Jasper

Silicon Dioxide (SiO2)

Bloodstone (Heliotrope)

SiO2 (Silicon Dioxide with Iron Oxide inclusions)

Polished River Jasper

Silicon Dioxide (SiO2) with iron and other mineral inclusions

Chalcedony

Silicon Dioxide (SiO2)