Mineral, Variety Of Chalcedony (Microcrystalline Quartz)

Chalcedony Pebble / Rough Agate

Silicon Dioxide (SiO2)

Polished brown jasper pebble

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

Tumbled red jasper

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

Raw orange chalcedony (carnelian-like)

Chalcedony, microcrystalline quartz (SiO₂), colored by iron oxides

Jasper with Chalcedony

Silicon Dioxide (SiO2)

Agate (within host rock)

Agate (Quartz variety SiO2)

Tumbled honey-brown chalcedony or agate

Microcrystalline quartz (SiO₂), likely chalcedony; exact identification requires testing

Agate (Chalcedony)

Silicon Dioxide (SiO2)

Green Banded Agate

Agate (Variety of Chalcedony/Quartz), SiO2

Polished agate/geode fragment

Microcrystalline quartz (chalcedony), SiO₂, with possible calcite or quartz cavity lining

Quartz (Chert/Chalcedony variety)

Silicon Dioxide (SiO2)

Ocean Jasper (Orbicular Jasper)

Silicon Dioxide (SiO2) with iron and other mineral inclusions

Banded agate tower (likely onyx/chalcedony)

Microcrystalline quartz, SiO₂; commonly called banded agate or black-and-white onyx

Carnelian (orange chalcedony)

Cryptocrystalline quartz, SiO₂; orange variety of chalcedony

Chalcedony (likely agate/chert variety)

Microcrystalline quartz, SiO₂

Tumbled jasper (likely picture jasper)

Jasper, an opaque microcrystalline variety of quartz (SiO₂); exact variety uncertain from the photo

Agate

Silicon Dioxide (Chalcedony), SiO2

Red jasper-like chalcedony pebble

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

Orange cabochon ring

Possibly carnelian (microcrystalline quartz, SiO₂); identification from the photograph is uncertain.

Tumbled red jasper

Jasper, microcrystalline quartz (SiO₂) colored by iron oxides

Polished brecciated jasper

Jasper; microcrystalline quartz (SiO₂) with iron-oxide staining and dark mineral fragments

Tumbled brown chalcedony (likely chert or agate)

Microcrystalline quartz, SiO₂ (chalcedony); exact variety is uncertain from the image

Carved jasper bear figurine

Jasper, microcrystalline quartz (SiO₂), likely brecciated or orbicular jasper

Red jasper (likely brecciated jasper)

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

Bloodstone

Chalcedony quartz variety (SiO2) with inclusions

Blue Lace Agate

Chalcedony (cryptocrystalline variety of Quartz), SiO2

Tumbled yellow jasper (probable)

Microcrystalline quartz/chalcedony, SiO₂, colored by iron oxides

Tumbled jasper (likely red/brown jasper)

Microcrystalline quartz/chalcedony, SiO₂, colored by iron oxides

Red Jasper (Chalcedony)

Silicon Dioxide (SiO2) with iron oxide inclusions

Tumbled yellow chalcedony (likely yellow jasper or quartz)

Microcrystalline quartz, SiO₂; probable chalcedony/jasper variety

Polished red jasper beads

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

Red jasper

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

Polished carnelian agate

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

Chalcedony

Cryptocrystalline Quartz (SiO2)

Banded Agate

Chalcedony (cryptocrystalline variety of Quartz), SiO2

Carnelian

Silicon dioxide (SiO2) - variety of Chalcedony

Banded Agate

Silicon Dioxide (SiO2) - variety Chalcedony

Yellow Jasper

Silicon dioxide (SiO2)

Tumbled carnelian (red chalcedony)

Carnelian, a microcrystalline variety of quartz (SiO₂)

Tumbled brown jasper (likely common jasper or chert)

Microcrystalline quartz, SiO₂, chiefly chalcedony/quartz with iron-oxide impurities

Tumbled agate/chalcedony (likely moss or plume agate)

Microcrystalline quartz, SiO₂, chiefly chalcedony with possible iron-oxide inclusions

Tumbled reddish-brown stone, likely jasper

Jasper (microcrystalline quartz, SiO₂), possibly red jasper or jasper-rich chert