Mineral (Variety Of Chalcedony)

Agate (specifically Carnelian Agate or Sardagate)

Silicon dioxide (SiO2) - variety of chalcedony

Agate

Silicon Dioxide (SiO2) - variety of Chalcedony

Carnelian Agate

Silicon dioxide (SiO2) - Chalcedony variety

Banded Agate

Silicon Dioxide (SiO2) - variety Chalcedony

Blue Lace Agate

Chalcedony (cryptocrystalline variety of Quartz), SiO2

Carnelian Agate

Silicon dioxide (SiO2) - variety of chalcedony

Yellow jasper (likely iron-rich chert)

Microcrystalline quartz, SiO₂, colored by iron oxides/hydroxides

Tumbled brown jasper

Microcrystalline quartz/chalcedony (SiO₂), iron-oxide colored

Polished brown jasper

Jasper, microcrystalline quartz (SiO₂), commonly containing iron-oxide and clay inclusions

Tumbled red/orange jasper

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

Polished brecciated jasper (likely ocean jasper or red jasper)

Microcrystalline quartz/chalcedony (SiO₂) with iron-oxide hematite/goethite and dark volcanic or manganese-rich inclusions

Tumbled jasper

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

Tumbled jasper (likely red/brown jasper)

Microcrystalline quartz/chalcedony, SiO₂, colored by iron oxides

Tumbled brown jasper

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

Red jasper (likely brecciated jasper)

Microcrystalline quartz, SiO₂, colored mainly by iron oxides

Tumbled agate/chalcedony (likely moss or plume agate)

Microcrystalline quartz, SiO₂; chalcedony with iron-oxide or mineral inclusions

Tumbled banded agate

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

Yellow Jasper

Silicon dioxide (SiO2) with iron oxide inclusions

Jasper

Silicon Dioxide (SiO2) with iron oxide impurities

Polished red jasper

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

Red Jasper

Jasper (Silicon Dioxide, SiO2)

Tumbled jasper, likely ocean or brecciated jasper

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

Tumbled chalcedony or quartz pebble

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

Polished white agate or chalcedony bead

Microcrystalline quartz (SiO₂), likely chalcedony/agate with iron-oxide staining or a brown mineral inclusion

Carnelian Agate

Silicon Dioxide (SiO2) - Variety of Chalcedony

Tumbled banded agate

Chalcedony (microcrystalline quartz), SiO₂

Banded Agate (specifically Sardonyx Agate)

Silicon Dioxide (SiO2) - Chalcedony variety

Flower Agate

Silicon Dioxide (SiO2) - Variety of Chalcedony

Agate (Geode nodule fragment)

Chalcedony (cryptocrystalline variety of Quartz), SiO2

Agate Geode

Silicon Dioxide (SiO2) - Chalcedony variety

Blue Lace Agate

Silicon Dioxide (SiO2) - Variety of Chalcedony

Polished banded agate

Agate, a banded variety of chalcedony (microcrystalline SiO₂)

Carnelian

SiO2 (Silicon Dioxide), a variety of Chalcedony

Yellow chalcedony or quartz fragment

Microcrystalline quartz, SiO₂ (tentative; possibly iron-stained chalcedony)

Red jasper (likely polished/chipped fragment)

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

Black Onyx

Silicon Dioxide (SiO2) with cryptocrystalline structure

Red jasper (likely brecciated jasper)

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

Red jasper pebble

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

Tumbled brown jasper

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

Banded Agate (Chert / Chalcedony)

Silicon Dioxide (SiO2)

Iron-rich chert or jasper

Microcrystalline quartz (SiO₂), commonly colored by hematite/goethite

Likely tumbled carnelian or orange chalcedony

Microcrystalline quartz, SiO₂ (chalcedony variety)