Mineralish (Variety Of Chalcedony)

Tumbled brown chalcedony (likely carnelian/agatesque material)

Microcrystalline quartz, SiO₂; chalcedony variety

Tumbled chalcedony (likely moss or gray agate)

Microcrystalline quartz, SiO₂; chalcedony/agate variety

Green chalcedony (possibly chrysoprase) cabochon

Chalcedony, microcrystalline quartz (SiO₂); chrysoprase is nickel-colored chalcedony

Agate Slab

Chalcedony (SiO2)

Tumbled agate or chalcedony

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

Polished carnelian/chalcedony

Chalcedony, microcrystalline quartz (SiO₂), with iron-oxide coloration

Polished carnelian/chalcedony

Microcrystalline quartz (SiO₂), likely iron-stained chalcedony

Tumbled yellow jasper or chalcedony

Microcrystalline quartz, SiO₂; likely iron-oxide-bearing jasper/chalcedony

Tumbled orange chalcedony (likely carnelian)

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

Tumbled amber-colored chalcedony or jasper

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

Carnelian (orange chalcedony)

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

Polished orange chalcedony or carnelian

Microcrystalline quartz (SiO₂), commonly called carnelian when orange-red

Tumbled orange chalcedony or carnelian

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

Tumbled agate/chalcedony

Microcrystalline quartz (SiO₂), likely banded chalcedony or agate

Tumbled carnelian (likely reddish chalcedony)

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

Agate Geode

Silicon Dioxide (SiO2)

Tumbled agate and chalcedony specimens

Microcrystalline quartz (SiO₂), chiefly chalcedony/agate

Tumbled orange chalcedony (likely carnelian)

Microcrystalline quartz, SiO₂; iron-bearing variety commonly termed carnelian

Chalcedony

Chalcedony (a microcrystalline variety of Quartz, SiO2)

Polished orbicular jasper (likely ocean jasper)

Silicified microcrystalline quartz (SiO₂), with iron-oxide and other mineral inclusions; exact variety cannot be confirmed from the image

Blue Lace Agate

Chalcedony (SiO2)

Chalcedony (Banded/Mottled Variety)

Chalcedony (a cryptocrystalline variety of Quartz, SiO2)

Chalcedony

Silicon Dioxide (SiO2)

Chalcedony (or a variety of Chalcedony, likely Agate or Jasper)

Chalcedony (SiO₂)

Chrysoprase

Chalcedony (Silicon Dioxide, SiO2), flavored by Nickel

Chrysoprase

Chalcedony (Silicon Dioxide, SiO2)

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

Microcrystalline quartz, SiO₂; coloration may derive from iron oxides

Yellow Chalcedony

Chalcedony (a cryptocrystalline variety of Quartz, SiO₂)

Black Onyx

Silicon dioxide (SiO2)

Tumbled chalcedony or agate

Microcrystalline quartz (SiO₂), likely pale agate/chalcedony

Tumbled orange chalcedony or carnelian

Microcrystalline quartz (SiO₂), likely iron-bearing chalcedony

Tumbled carnelian/chalcedony pebbles

Chalcedony, microcrystalline quartz (SiO₂), likely iron-colored carnelian

Honey-colored chalcedony (likely carnelian)

Microcrystalline quartz, SiO₂; orange chalcedony colored by iron oxides

Blue Chalcedony

Silicon Dioxide (SiO2)

Chalcedony (Agate)

Silicon Dioxide (SiO2)

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 brown chalcedony/jasper

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

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)

Tumbled Yellow Chalcedony / Iron-Stained Quartz

Silicon Dioxide (SiO2)