Mineral (Specifically A Variety Of Chalcedony, Which Is A Cryptocrystalline Quartz)

Carnelian Agate

Silicon Dioxide (SiO2)

Plume Agate or Moss Agate

Agate (SiO2)

Banded Agate (specifically Lake Superior Agate style)

Agate (Cryptocrystalline Quartz, SiO2)

Polished brecciated jasper bracelet

Jasper, microcrystalline quartz (SiO₂), commonly with hematite and iron-oxide inclusions

Red jasper (likely rough jasper/chert)

Microcrystalline quartz (SiO₂), commonly colored by iron oxides

Dragon Blood Jasper

Epidote-rich Quartzite (SiO2 with Ca2(Al,Fe)3(SiO4)3(OH))

Polished blue chalcedony (likely seam agate)

Microcrystalline quartz, SiO₂; chalcedony with iron-oxide inclusions

Tumbled banded jasper, likely brecciated jasper

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

Chrysoprase

Silicon Dioxide (Chalcedony variety), SiO2

Chalcedony

Silicon Dioxide (SiO2)

Tumbled chalcedony (likely gray/brown agate)

Microcrystalline quartz, SiO₂ (chalcedony; possible agate variety)

Tumbled carnelian

Carnelian, a red-orange cryptocrystalline chalcedony (SiO₂)

Polished banded agate

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

Tumbled orange-and-white chalcedony (likely carnelian or orange agate)

Microcrystalline quartz, SiO₂; chalcedony variety, possibly iron-colored carnelian

Ocean Jasper

Spherulitic Chalcedony (SiO2)

Yellow Jasper

Silicon Dioxide (SiO2) with Goethite or Limonite inclusions

Chert (Iron-stained)

Chert (Microcrystalline Quartz, SiO2)

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Red jasper pebble

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

Yellow Jasper

Silicon Dioxide (SiO2) with iron inclusions

Tumbled chalcedony (likely moss or dendritic agate)

Microcrystalline quartz, SiO₂, with iron-oxide inclusions

Polished brown jasper (likely brecciated or orbicular jasper)

Microcrystalline quartz/chalcedony, SiO₂, colored by iron oxides and other inclusions

Red Jasper

Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)

Yellow Chalcedony (Agate)

Silicon Dioxide (SiO2)

Quartz (Chalcedony/Agate nodule)

Silicon dioxide (SiO2)

Chert (Flint)

Chert (Silicon Dioxide, SiO2)

Chalcedony (Agate / Jasper Specimen)

Silicon Dioxide (SiO2)

Polished pink banded agate

Banded chalcedony (microcrystalline quartz, SiO₂), likely dyed or naturally vivid pink

Red Jasper

Silicon Dioxide (SiO2)

Tumbled chalcedony (likely jasper/chert variety)

Microcrystalline quartz, SiO₂ (chalcedony; opaque varieties commonly called jasper or chert)

Blue Lace Agate (Polished Point)

Silicon Dioxide (SiO2)

Chert (often called Flint)

Chert (Microcrystalline or Cryptocrystalline Quartz, SiO2)

Tumbled red jasper

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

Orbicular Jasper (Ocean Jasper tendency)

Silicon Dioxide (SiO2) with impurities

Milky Quartz

Silicon Dioxide (SiO2)

Tumbled red jasper

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

Tumbled jasper (likely ocean jasper or brecciated jasper)

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

Polished agate (likely Botswana or plume agate)

Microcrystalline quartz, mainly chalcedony (SiO₂), with iron-oxide inclusions

Tumbled orange chalcedony or carnelian

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

Dyed pink agate slice

Agate (microcrystalline quartz, SiO₂), commonly chalcedony with artificial dye

Tumbled brown chalcedony or jasper

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

Agate (specifically, a slice of a Blue Lace or Chalcedony Agate nodule)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz