Mineralish (Variety Of Chalcedony)

Polished jasper pebble

Microcrystalline quartz (chalcedony), usually with iron-oxide impurities

Agate and Jasper

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Crazy Lace Agate

Silicon Dioxide (SiO2) with iron and aluminum inclusions

Jasper

Jasper (Silicon Dioxide, SiO2)

Tumbled carnelian agate

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

Tumbled brown jasper

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

Polished jasper pebble

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

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Ocean Jasper or Orbicular Jasper

SiO2

Chalcedony (Agate)

Cryptocrystalline Quartz (SiO2)

Yellow Chalcedony

Cryptocrystalline Quartz (SiO2)

Tumbled blue chalcedony/agate (likely glassy silica material)

Microcrystalline quartz, SiO₂; possibly blue chalcedony or dyed agate

Chert and Chalcedony

Cryptocrystalline Quartz (SiO2)

Likely polished agate beads

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

Carnelian (Chalcedony)

Silicon Dioxide (SiO2) - variety of Chalcedony

Small tumbled stone, possibly moss agate

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

Yellow agate (likely dyed chalcedony) pendant

Chalcedony, microcrystalline quartz (SiO₂)

Agate

Silicon Dioxide (Chalcedony), SiO2

Dyed Agate (Dragon Vein Agate Bead)

Silicon dioxide (SiO2) variety Chalcedony

Geode (Unopened)

Quartz/Chalcedony concretion

Agate (or Chalcedony)

Silicon Dioxide (SiO2)

Polished brecciated jasper

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

Orange tumbled stone, possibly carnelian

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

Jasper or Agate Nodule

SiO2

Black cabochon gemstone, likely onyx or agate

Likely chalcedony (microcrystalline quartz, SiO₂); exact identification is not possible from the photo

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

Polished carnelian

Carnelian, a reddish-orange cryptocrystalline chalcedony (SiO₂), colored mainly by iron oxides.

Polished carnelian

Carnelian, orange-red chalcedony (microcrystalline quartz, SiO₂)

Orange-red jasper pebble

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

Tumbled orange chalcedony (likely carnelian)

Cryptocrystalline quartz, SiO₂; orange variety commonly called carnelian

Raw orange chalcedony (carnelian-like)

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

Polished carnelian (likely)

Carnelian, orange-red chalcedony; microcrystalline quartz (SiO₂)

Polished pink agate/chalcedony pebble

Chalcedony (microcrystalline quartz, SiO₂), likely iron-stained agate

Red Jasper

Silicon Dioxide (SiO2) with Hematite impurities

Red Jasper

Silicon Dioxide (SiO2) with Hematite (Fe2O3)

Tumbled yellow jasper

Jasper, microcrystalline quartz (SiO₂) colored by iron oxides

Tumbled carnelian (orange chalcedony)

Carnelian, a microcrystalline variety of quartz; silicon dioxide (SiO₂) colored mainly by iron oxides

Tumbled jasper or jasper-rich chert

Microcrystalline quartz (SiO₂) with iron-oxide impurities

Tumbled jasper (likely brecciated or orbicular jasper)

Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide inclusions

Tumbled carnelian

Carnelian, orange chalcedony (microcrystalline SiO₂)

Polished/tumbled agate (likely carnelian or iron-stained chalcedony)

Microcrystalline quartz, SiO₂; chalcedony with iron-oxide inclusions