Mineralish (Variety Of Chalcedony)

Chalcedony

Silicon Dioxide (SiO2)

Agate

Agate (Chalcedony), SiO2

Iron-rich jasper (likely rough jasper/chert)

Microcrystalline quartz (SiO₂), colored by iron oxides

Polished banded agate

Microcrystalline quartz (SiO₂), chiefly chalcedony

Brown chalcedony (likely agate)

Microcrystalline quartz, SiO₂; chalcedony, possibly banded agate

Small reddish-brown pebble, possibly jasper or iron-stained quartz

Unidentified silica-rich pebble; visual identification is insufficient to distinguish jasper, quartz, or another material

Green tumbled agate (likely green chalcedony)

Chalcedony, microcrystalline quartz (SiO₂); exact identification is uncertain from the photo

Tumbled chalcedony (likely brown agate)

Chalcedony, microcrystalline quartz (SiO₂); possibly agate

Polished pink-orange chalcedony (likely carnelian)

Microcrystalline quartz, SiO₂; carnelian is orange-red chalcedony

Tumbled carnelian

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

Jasper

Microcrystalline Quartz (SiO2)

Carnelian Agate

Silicon Dioxide (SiO2)

Chalcedony

Silicon Dioxide (SiO2)

Carnelian

SiO2 (Variety of Chalcedony)

Agate

Chalcedony (SiO2)

Carnelian Ring

SiO2 (Variety of Chalcedony)

Orange chalcedony or carnelian fragment

Microcrystalline quartz, SiO₂; carnelian is orange cryptocrystalline quartz colored mainly by iron oxides

Tumbled/rounded agate (likely mossy or brecciated chalcedony)

Microcrystalline quartz, SiO₂ (chalcedony/agate)

Tumbled carnelian/chalcedony

Cryptocrystalline quartz (SiO₂), likely iron-stained chalcedony

Agate (Puddingstone style)

Silicon Dioxide (SiO2) with impurities

Polished carnelian jasper / brecciated jasper

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

Red Chalcedony (likely dyed)

Chalcedony (a variety of Quartz), SiO2

Tumbled chalcedony/agate (likely iron-stained quartz)

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

Polished carnelian agate

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

Tumbled carnelian or orange chalcedony

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

Polished brecciated jasper (likely)

Microcrystalline quartz, SiO₂, with iron-oxide-rich brown fragments and pale silica

Red Jasper

Silicon Dioxide (SiO2) - variety Jasper

Yellow Jasper with Hematite

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions

Banded Calcite (Mexican Onyx)

Calcium Carbonate (CaCO3)

Tumbled jasper or chert

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

Red jasper (probable)

Jasper, an opaque microcrystalline variety of quartz; SiO₂, commonly colored by iron oxides

Polished orange jasper

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

Polished brecciated jasper

Silica-rich microcrystalline quartz (SiO₂), likely brecciated jasper with iron-oxide staining

Polished agate/geode slab

Banded chalcedony (microcrystalline quartz, SiO₂), likely with quartz crystals

Polished agate geode slice

Microcrystalline quartz (chalcedony), SiO₂

Tumbled blue-green stone, likely dyed agate

Agate (microcrystalline quartz, SiO₂); blue coloration may be artificial

Polished jasper pebble

Jasper (microcrystalline quartz, SiO₂)

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Polished jasper-like stone

Likely chalcedony (microcrystalline quartz, SiO₂), possibly brecciated jasper

Tumbled carnelian agate

Carnelian, a reddish-orange variety of chalcedony (microcrystalline quartz, SiO₂)

Jasper or Agate

Silicon dioxide (SiO2)

Likely tumbled carnelian or orange chalcedony

Microcrystalline quartz, SiO₂ (chalcedony variety)