Mineral (Specifically A Variety Of Chalcedony, Which Is A Cryptocrystalline Quartz)

Unakite

Epidote-Feldspar rock (specifically, a variety of granite)

Banded Agate

Silicon Dioxide (SiO2) - Chalcedony

Banded agate (likely carnelian/chalcedony)

Microcrystalline quartz, SiO₂; chalcedony with iron-oxide coloration

Chrysoprase

Nickel-bearing Chalcedony (SiO2 with inclusions of Ni-compounds like kerolite or pimelite)

Quartz (specifically Milky or Clear Quartz fragment)

Silicon Dioxide (SiO2)

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Brown chalcedony (likely jasper or chert)

Microcrystalline quartz, SiO₂; opaque iron-oxide-rich variety

Agate (Slab)

Agate (Cryptocrystalline variety of Quartz, SiO2)

Tumbled red jasper

Jasper, microcrystalline quartz (SiO₂) colored by iron oxides

Chalcedony

Cryptocrystalline Quartz (SiO2)

Chalcedony (Common Opal variant or Agate)

Silicon Dioxide (SiO2)

Tumbled agate (likely banded/chalcedony agate)

Microcrystalline quartz, SiO₂; chalcedony with possible iron-oxide coloration

Banded agate (likely jasper/chalcedony nodule)

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

Chalcedony (Agate Pebble)

Microcrystalline Quartz (SiO2)

Tumbled green agate (likely moss or chalcedony agate)

Cryptocrystalline quartz, SiO₂; likely green chalcedony with possible chlorite or iron inclusions

Honey-colored chalcedony (likely carnelian)

Microcrystalline quartz, SiO₂; orange chalcedony colored by iron oxides

Tumbled carnelian (likely)

Carnelian, a chalcedony variety of microcrystalline quartz (SiO₂), colored mainly by iron oxides

Tumbled jasper, likely ocean or brecciated jasper

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

Green Chalcedony (likely Chrysoprase or Green Onyx)

Silicon Dioxide (SiO2) with trace nickel or chromium inclusions

Tumbled yellow chalcedony (likely yellow jasper or citrine-colored quartz)

Microcrystalline quartz, SiO₂; coloration may come from iron oxides or fine inclusions

Tumbled orange chalcedony or carnelian

Microcrystalline quartz (SiO₂), likely iron-stained chalcedony

Tumbled jasper pebble (likely ocean jasper or brecciated jasper)

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

Tumbled carnelian or orange chalcedony

Chalcedony (microcrystalline quartz), SiO₂; likely iron-stained variety

Polished brecciated jasper

Jasper, an opaque microcrystalline variety of quartz (SiO₂), with iron-oxide and possibly chlorite inclusions

Chert (Jasper variety)

Silicon Dioxide (SiO2)

Red jasper (likely)

Microcrystalline quartz, SiO₂, colored red by iron oxides

Tumbled amber-colored chalcedony and quartz

Chalcedony (microcrystalline SiO₂), quartz (SiO₂), possibly carnelian or citrine; one piece may be druzy chalcedony

Tumbled chalcedony/agate (likely iron-stained quartz)

Microcrystalline quartz, SiO₂; chalcedony with possible agate banding and iron-oxide inclusions

Flint (Chert)

Cryptocrystalline Quartz (SiO2)

Tumbled agate/chalcedony (likely moss or plume agate)

Microcrystalline quartz, SiO₂; chalcedony with iron-oxide or mineral inclusions

Polished agate/chalcedony slab

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

Chalcedony (Botryoidal)

Silicon Dioxide (SiO2)

Yellow Jasper / Chert

Silicon Dioxide (SiO2) with Goethite or Limonite inclusions

Tumbled carnelian/chalcedony

Chalcedony (microcrystalline quartz), SiO₂; reddish color from iron oxides

Tumbled orange chalcedony (likely carnelian)

Carnelian, a microcrystalline quartz variety; SiO₂, commonly colored by iron oxides

Yellow Jasper

Silicon Dioxide (SiO2) with goethite or iron oxide inclusions

Polished red jasper

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

Tumbled brown chalcedony (likely jasper or agate)

Microcrystalline quartz, SiO₂; chalcedony with iron-oxide staining

Tumbled chalcedony (likely blue-gray agate)

Cryptocrystalline quartz, SiO₂; chalcedony/agate variety

Tumbled red jasper

Microcrystalline quartz (SiO₂), commonly colored by iron oxides

Banded Agate (specifically Botryoidal/Orbicular Agate)

Silicon Dioxide (SiO2)

Carnelian Agate

Silicon Dioxide (SiO2)