Mineral, Variety Of Chalcedony (Microcrystalline Quartz)

Yellow Jasper

Silicon Dioxide with Limonite/Goethite inclusions (SiO2)

Agate geode fragment

Banded chalcedony (microcrystalline SiO₂), lining a geode cavity

Tumbled brown jasper

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

Chalcedony on Matrix (Botryoidal Agate)

Silicon Dioxide (SiO2)

Tumbled jasper, likely ocean or brecciated jasper

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

Tumbled jasper, likely picture or brecciated jasper

Microcrystalline quartz (SiO₂) with iron-oxide and other mineral impurities

Polished yellow jasper pebble

Jasper, microcrystalline quartz (SiO₂) with iron-oxide/clay impurities

Polished jasper (likely brecciated or orbicular jasper)

Jasper, microcrystalline quartz (SiO₂) with iron-oxide and other mineral impurities

Polished jasper pebble

Jasper, microcrystalline quartz (SiO₂) with iron-oxide impurities

Red-and-gray jasper (likely orbicular or brecciated jasper)

Jasper, microcrystalline quartz (SiO₂) with iron-oxide pigments

Dyed Agate Slice

Silicon Dioxide (SiO2) - variety of Chalcedony

Red jasper

Microcrystalline quartz (SiO₂), iron-oxide-rich chalcedony

Bloodstone

Chalcedony (Variety: Bloodstone / Heliotrope), SiO2

Tumbled banded agate (likely carnelian or sardonyx)

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

Likely red-and-green jasper (rough pebble)

Microcrystalline quartz (SiO₂), colored by iron oxides; exact identification requires testing

Tumbled reddish jasper

Microcrystalline quartz (SiO₂), commonly colored by iron oxides

Tumbled red jasper

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

Red jasper (likely rough jasper/chert)

Microcrystalline quartz (SiO₂), commonly colored by iron oxides

Red jasper pebble

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

Tumbled carnelian/chalcedony

Cryptocrystalline quartz (SiO₂), likely iron-stained chalcedony

Tumbled banded jasper, likely brecciated jasper

Microcrystalline quartz (SiO₂) with iron-oxide and clay inclusions

Tumbled chalcedony (likely carnelian or orange agate)

Microcrystalline quartz, SiO₂; chalcedony variety, possibly Fe-bearing carnelian

Blue-green agate bead bracelet

Chalcedony (microcrystalline quartz, SiO₂), likely dyed blue-green

Agate Nodule / Weathered Agate

Silicon Dioxide (Chalcedony / Quartz, SiO2)

Orange chalcedony (carnelian)

Microcrystalline quartz, SiO₂; orange variety of chalcedony

Polished/tumbled agate or chert

Microcrystalline quartz (SiO₂), likely chalcedony with opaque impurities

Dendritic agate or included chalcedony (likely tumbled)

Microcrystalline quartz, SiO₂; inclusions likely manganese-oxide dendrites or iron minerals

Raw carnelian/chalcedony

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

Tumbled red jasper

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

Polished agate slice

Agate, a banded variety of chalcedony (microcrystalline SiO₂)

Blue Chalcedony

Silicon Dioxide (SiO2)

Jasper (specifically Fancy or Polychrome Jasper)

Silicon Dioxide (SiO2) - Chalcedony

Agate

Silicon Dioxide (SiO2) - variety of Chalcedony

Red jasper pebble

Microcrystalline quartz (SiO₂), colored chiefly by iron oxides

Likely weathered jasper or iron-rich chert

Microcrystalline quartz (SiO₂), with iron-oxide staining

Chalcedony / Quartz Pebble

Silicon Dioxide (SiO2)

Jasper with Quartz inclusions

Silicon Dioxide (SiO2) with varying mineral impurities

Tumbled agate/chalcedony

Microcrystalline quartz (SiO₂), likely mossy or dendritic agate with iron-oxide inclusions

Quartz (Chert/Chalcedony variety)

Silicon Dioxide (SiO2)

Polished agate/jasper nodule

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

Tumbled blue chalcedony (likely blue lace agate)

Microcrystalline quartz, SiO₂; chalcedony with possible agate banding

Yellow jasper (likely iron-stained chert)

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