Mineral (Chalcedony Variety)

Jasper with Iron Oxides

Silicon Dioxide (SiO2) with Fe2O3 inclusions

Small orange-red tumbled gemstones, likely carnelian

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

Jasper

Jasper (Silicon Dioxide, SiO2)

Red Jasper (Chert)

Silicon Dioxide (SiO2) with iron inclusions

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Tumbled orange-and-white jasper or brecciated chalcedony

Microcrystalline quartz (SiO₂), likely iron-oxide-stained jasper; exact variety cannot be confirmed from the image

Agate

Chalcedony (Microcrystalline Quartz) - SiO2

Tumbled chalcedony (likely agate or jasper)

Microcrystalline quartz, SiO₂ (chalcedony)

Agate (Carnelian-like)

Chalcedony (Silicon Dioxide, SiO2)

Tumbled honey-brown chalcedony (likely common quartz)

Microcrystalline quartz, SiO₂; possibly iron-stained chalcedony or low-grade agate

Polished agate/jasper pebble

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

Tumbled jasper, likely brecciated or brown-green jasper

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

Banded Agate

Agate (Silicon Dioxide, SiO2)

Mixed Chalcedony and Jasper Bracelet (possibly 'Ocean Jasper' or similar banded variety for brown beads, and blue/grey Chalcedony for the translucent beads)

Chalcedony (SiO2), Jasper (SiO2 with impurities)

Polished brown-and-cream jasper

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

Yellow-brown jasper (likely iron-stained chert)

Microcrystalline quartz (SiO₂), varieties of chalcedony/chert colored by iron oxides

Red-and-blue jasper (likely ocean jasper or dyed/polished jasper)

Microcrystalline quartz, chiefly SiO₂; jasper is an opaque chalcedony variety colored by iron oxides and other impurities

Chert Pebble (Jasper variety)

Silicon Dioxide (SiO2)

Yellow Jasper

Silicon Dioxide (SiO2) with goethite or iron oxide inclusions

Polished brecciated jasper pebble

Microcrystalline quartz (SiO₂), with iron-oxide inclusions

Yellow Jasper

Cryptocrystalline Quartz (SiO2 with Iron Hydroxide inclusions)

Blue Lace Agate

Chalcedony (Silicon Dioxide, SiO2)

Chalcedony (Agate/Chert variety)

Silicon Dioxide (SiO2)

Red jasper (likely brecciated jasper)

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

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Chalcedony on Matrix

Silicon Dioxide (SiO2)

Polished jasper pebble

Jasper, an opaque microcrystalline variety of quartz (SiO₂), often chalcedony with iron-oxide inclusions

Chalcedony

Silicon Dioxide (SiO2)

Yellow Jasper

Silicon dioxide (SiO2)

Banded Agate (specifically Carnelian Agate color)

Silicon Dioxide (SiO2) - variety of Chalcedony

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

Polished agate pebble

Banded chalcedony, a microcrystalline variety of quartz (SiO₂)

Eye Agate (Sulemani Agate)

Banded Chalcedony (SiO2)

Blue Chalcedony

Silicon Dioxide (SiO2)

Chalcedony Pebble

Cryptocrystalline Quartz (SiO2)

Polished jasper pendant

Jasper, an opaque microcrystalline variety of quartz (SiO₂); exact variety cannot be confirmed from the image

Carnelian

Chalcedony (SiO2)

Banded Agate

Chalcedony (SiO2 with impurities)

Jasper and Agate (Polished Pebble)

Chalcedony (SiO2 with impurities)

Tumbled banded jasper, likely brecciated jasper

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

Tumbled agate (likely moss or scenic agate)

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