Mineral, Variety Of Chalcedony (Microcrystalline Quartz)

Tumbled orange chalcedony or carnelian

Microcrystalline quartz (SiO₂), likely iron-stained chalcedony

Tumbled jasper (likely)

Microcrystalline quartz, SiO₂; likely jasper, a variety of chalcedony

Polished carnelian jasper / brecciated jasper

Microcrystalline quartz (SiO₂), chalcedony with iron-oxide pigments and opaque jasper fragments

Tumbled chalcedony/agate (likely iron-stained quartz)

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

Jasper (likely brecciated jasper)

Microcrystalline quartz, SiO₂, colored by iron oxides

Carnelian

Carnelian (a variety of Chalcedony, SiO2)

Polished chalcedony (likely moss or dendritic agate)

Microcrystalline quartz, SiO₂, with iron/manganese oxide inclusions

Tumbled amber-colored agate or chalcedony

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

Tumbled yellow-orange chalcedony (likely carnelian)

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

Tumbled chalcedony (likely agate or jasper fragment)

Microcrystalline quartz, SiO₂ (chalcedony)

Yellow-orange chalcedony (possibly carnelian)

Microcrystalline quartz, SiO₂; orange coloration commonly from iron oxides

Likely polished agate beads

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

Tumbled red-and-cream jasper

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

Tumbled jasper, likely red/brown jasper

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

Polished orange agate beads

Chalcedony, microcrystalline quartz (SiO₂), commonly sold as agate

Red jasper (likely tumbled)

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

Chalcedony (variations like Agate or Jasper)

Chalcedony (SiO₂ - microcrystalline quartz)

Tumbled purple agate (likely amethyst-bearing agate)

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

Banded Jasper

Silicate Mineral (Microcrystalline Quartz / SiO2)

Agate

Cryptocrystalline quartz (SiO2)

Banded agate (polished agate slice)

Agate, a variety of microcrystalline quartz (SiO₂; chalcedony)

Polished carnelian (likely)

Carnelian, a reddish-orange cryptocrystalline quartz variety; SiO₂

Iron-stained jasper/chert fragment

Microcrystalline quartz (SiO₂), likely hematite/goethite-bearing jasper

Chalcedony (Variety: Agate)

Silicon Dioxide (SiO2)

Blue Chalcedony

Silicon Dioxide (SiO2)

Jasper with Quartz

Silicon Dioxide (SiO2) - Chalcedony variety

Tumbled Agate and Chalcedony

Cryptocrystalline Quartz (SiO2)

Red jasper (likely iron-rich chert)

Microcrystalline quartz, SiO₂, colored mainly by hematite/goethite

Jasper Pendant

Silicon dioxide (SiO2) with impurities

Tumbled jasper

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

Tumbled pale-yellow chalcedony (possibly yellow jasper)

Microcrystalline quartz, SiO₂; chalcedony/jasper varieties

Jasper / Chert (polished)

Microcrystalline Quartz (SiO2)

Yellow chalcedony or quartz fragment

Microcrystalline quartz, SiO₂ (tentative; possibly iron-stained chalcedony)

Red/orange chalcedony (carnelian), possibly dyed or heat-treated

Chalcedony, cryptocrystalline SiO₂ (quartz variety)

Tumbled brown stone, likely jasper or chert

Microcrystalline quartz (SiO₂), probably iron-stained jasper/chert

Carnelian

Orange chalcedony, microcrystalline quartz (SiO₂)

Polished chrysoprase (likely)

Chalcedony, microcrystalline quartz (SiO₂), colored by nickel-bearing minerals

Orange chalcedony or tumbled carnelian fragment

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

Agate

Chalcedony (cryptocrystalline variety of Quartz, SiO2)

Red jasper (possible polished or dyed stone)

Jasper, an opaque microcrystalline variety of quartz (SiO₂)

Brown chalcedony (likely carnelian)

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

Light-colored agate (likely chalcedony)

Chalcedony, microcrystalline quartz (SiO₂); exact variety is uncertain from the image