Mineral_variety_of_chalcedony

Banded Agate

Chalcedony (SiO2) with impurities

Thunder Egg (Agate/Jasper filled)

Chalcedony variety Agate/Jasper in a Rhyolitic matrix

Polished brecciated jasper

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

Polished brecciated jasper (likely picture jasper)

Silica-rich microcrystalline quartz/chalcedony, SiO₂, with iron-oxide and clay inclusions

Polished orbicular jasper

Microcrystalline quartz (SiO₂) with iron-rich and altered volcanic inclusions

Tumbled carnelian

Carnelian, orange chalcedony (microcrystalline SiO₂)

Yellow Agate

Silicon Dioxide (SiO2)

Jasper (Iron-stained Quartzite/Chert)

Silicon Dioxide (SiO2) with iron oxide inclusions

Polished jasper pebble

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

Blue agate (likely dyed and polished)

Microcrystalline quartz, SiO₂ (chalcedony); blue color may be dye

Polished jasper pebble

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

Yellow jasper (likely polished/tumbled)

Microcrystalline quartz, SiO₂, colored by iron oxides; exact identification is uncertain from the image

Tumbled carnelian

Carnelian, orange-red chalcedony (microcrystalline SiO₂)

Tumbled brown agate (possible carnelian or chalcedony)

Microcrystalline quartz, SiO₂; agate is banded chalcedony

Jasper

Silicon dioxide (SiO2)

Polished carnelian agate

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

Jasper

Silicon dioxide (SiO2)

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Jasper

Silicon dioxide, SiO2

Fancy Jasper

Silicon Dioxide (SiO2)

Yellow Jasper

Silicon Dioxide (SiO2) with iron hydroxides

Ocean Jasper

Spherulitic Chalcedony (SiO2)

Tumbled brown agate/chalcedony (probable)

Microcrystalline quartz, SiO₂; likely iron-stained agate or jasper

Tumbled amber-colored chalcedony or jasper

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

Agate (Chalcedony)

Silicon Dioxide (SiO2)

Blue Chalcedony

Silicon Dioxide (SiO2)

Agate (or Chalcedony)

Silicon Dioxide (SiO2)

Red jasper (likely tumbled/polished chalcedony)

Jasper, an opaque variety of microcrystalline quartz (SiO₂)

Tumbled brown jasper

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

Green Chalcedony (Batu Akik)

Silicon Dioxide (SiO2)

Small tumbled stone, possibly moss agate

Likely chalcedony (microcrystalline SiO₂); exact identification is uncertain from the image

Polished pink chalcedony (possibly carnelian)

Microcrystalline quartz, SiO₂; chalcedony variety, with exact variety uncertain from the image

Likely polished agate beads

Agate, a banded variety of chalcedony (microcrystalline SiO₂); exact identification is uncertain from the image

Green agate/geode slab

Cryptocrystalline quartz (chalcedony), SiO₂, likely agate with druzy quartz

Polished banded agate

Banded chalcedony, microcrystalline quartz (SiO₂)

Tumbled carnelian and related stones

Carnelian: orange-red chalcedony, microcrystalline SiO₂; the dark central piece may be hematite- or jasper-rich material

Yellow Jasper

Silicon Dioxide (SiO2) with Goethite inclusions

Banded Jasper

Silicon Dioxide with Iron Oxide impurities (SiO2)

Chalcedony (Tumbled)

Cryptocrystalline Quartz (SiO2)

Yellow Jasper

Silicon Dioxide (SiO2) with iron inclusions

Chalcedony on Matrix

Silicon Dioxide (SiO2)

Carnelian (Tumbled)

Carnelian (variety of Chalcedony, SiO2)