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

Chalcedony (Quartz variety)

Silicon Dioxide (SiO2)

Carnelian

Carnelian (Silicon Dioxide, SiO2)

Tumbled yellow chalcedony (likely yellow jasper)

Microcrystalline quartz, SiO₂; chalcedony/jasper variety

Polished jasper pebble

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

Likely tumbled quartz/chalcedony

Quartz (SiO₂), possibly milky quartz or pale chalcedony

Tumbled agate or chalcedony

Microcrystalline quartz (SiO₂), likely brown/orange chalcedony or agate

Polished carnelian (red-orange chalcedony)

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

Tumbled red/orange jasper

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

Agate

SiO2

Tumbled jasper (likely brown jasper)

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

Tumbled orange chalcedony or carnelian

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

Zebra Jasper

Jasper (variety of Quartz/Chalcedony), SiO2

Red jasper pebble

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

Iron-rich jasper (likely brecciated jasper)

Jasper, microcrystalline quartz (SiO₂) colored by hematite/goethite and iron oxides

Tumbled pale chalcedony (likely quartz)

Microcrystalline quartz, SiO₂; possibly pale agate or quartz

Tumbled yellow-brown agate

Agate, a banded variety of microcrystalline quartz (SiO₂)

Orange chalcedony geode

Microcrystalline quartz (SiO₂), commonly called carnelian or orange agate when strongly colored

Gray chalcedony or quartz fragment

Microcrystalline quartz, SiO₂ (tentative)

Quartz (specifically Milky/White Quartz)

Silicon Dioxide (SiO2)

Chalcedony Nodule (Commonly known as Agate or Chert)

Microcrystalline Quartz (SiO2)

Tumbled orange-and-white chalcedony

Chalcedony, microcrystalline quartz (SiO₂), likely orange carnelian/white agate variety

Tumbled chalcedony (likely moss or dendritic agate)

Microcrystalline quartz, SiO₂, with iron-oxide inclusions

Tumbled blue chalcedony (likely blue agate)

Microcrystalline quartz, SiO₂; chalcedony/agate variety

Red jasper with druzy quartz

Jasper (microcrystalline quartz, SiO₂), locally coated or veined with crystalline quartz

Chert (Jasper variety)

Microcrystalline Quartz (SiO2)

Tumbled red jasper (probable)

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

Chalcedony (Agate/Carnelian pebbles)

Cryptocrystalline Quartz (SiO2)

Orange chalcedony (possibly carnelian)

Microcrystalline quartz, SiO₂; iron-oxide-bearing chalcedony

Chert

Chert (Microcrystalline Quartz, SiO2)

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Tumbled jasper (likely picture jasper or iron-rich jasper)

Microcrystalline quartz/chalcedony, SiO₂, colored by iron oxides

Tumbled milky quartz

Quartz (silicon dioxide, SiO₂)

Polished orange agate/jasper cabochon

Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide coloration; exact variety uncertain

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

Microcrystalline quartz, SiO₂; chalcedony with iron-oxide inclusions

Polished banded agate

Banded chalcedony, microcrystalline quartz (SiO₂)

Seam Agate

Agate (Banded variety of Chalcedony, SiO2)

Polished pink agate/chalcedony pebble

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

Yellow Quartz

SiO2 (Crystalline Silicon Dioxide)

Ocean Jasper

Spherulitic Chalcedony (SiO2 with impurities)

Polished jasper pebble

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

Jasper

Silicon dioxide (SiO2)

Polished red jasper

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