Mineral (Specifically A Cryptocrystalline Variety Of Quartz)

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)

Banded Carnelian

Carnelian (Silicon Dioxide / SiO2)

Fancy Jasper

Silicon Dioxide (SiO₂)

Blue Lace Agate

Cryptocrystalline variety of Quartz (SiO2)

Yellow Jasper (Chert)

Silicon Dioxide (SiO2) with iron oxide inclusions

Red Jasper (with Quartz)

Silicon Dioxide (SiO2) with Hematite inclusions

Agate Nodules

Cryptocrystalline Quartz (SiO2)

Chert (Nodule fragment)

Silicon Dioxide (SiO2)

Banded Agate (specifically Carnelian Agate)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Quartz (Agate/Chalcedony variety)

Silicon Dioxide (SiO2)

Chert (Flint)

Microcrystalline Quartz (SiO2)

Chert

Microcrystalline quartz (SiO2)

Red Agate

Agate (Cryptocrystalline variety of Quartz, SiO2)

Chert / Jasper

Microcrystalline Quartz (SiO2)

Chalcedony (specifically Agate or Carnelian variety)

Cryptocrystalline Silica (SiO2)

Banded Agate

Chalcedony (cryptocrystalline variety of Quartz), SiO2

Sardonyx Cameo

Silicon Dioxide (SiO2) - variety Cryptocrystalline Quartz

Chert / Flint

Cryptocrystalline Quartz (SiO2)

Banded Agate (specifically Carnelian Agate slice)

Chalcedony (cryptocrystalline variety of Quartz), SiO2

Mixed collection of minerals and rocks (Jasper, Carnelian, Granite, and Quartz)

Silicon Dioxide (SiO2) with varying impurities for silicates and igneous aggregates

Agate (specifically a small Chalcedony nodule)

Agate (Cryptocrystalline variety of Quartz, SiO2)

Chalcedony (Agate/Carnelian)

Cryptocrystalline Silicon Dioxide (SiO2)

Leopard Skin Jasper

Chalcedony (cryptocrystalline Quartz)

Chert (Flint Nodules)

Microcrystalline Quartz (SiO2)

Jasper (or possibly Agate/Chalcedony) beads

SiO2 (Silicon Dioxide)

Banded Agate (specifically Botswana Agate or Water-line Agate)

Chalcedony (cryptocrystalline variety of Quartz), SiO2

Chert (Jasper variety)

Chert (SiO2)

Flint

SiO2 (Cryptocrystalline Quartz)

Ocean Jasper (Orbicular Jasper)

Silicon Dioxide (SiO2) - Variety of Chalcedony/Quartz

Flint

SiO2 (Cryptocrystalline Quartz / Chert)

Chert (Tripolitic Chert / Flint Nodules)

Microcrystalline Quartz (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Agate (Carnelian / Chalcedony)

Silicon Dioxide (SiO2)

Chert / Jasper

Microcrystalline Quartz (SiO2)

Chert (and Flint)

Silicon Dioxide (SiO2)

Chalcedony (specifically Agate and Carnelian variety)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Agate (specifically a Blue Agate Geode Slice)

Chalcedony (cryptocrystalline variety of Quartz); SiO2

Banded Agate (specifically Eye Agate / Chalcedony)

Agate (Cryptocrystalline variety of Quartz, SiO2)

Chert (Jasper variety)

Microcrystalline Quartz (SiO2)

Black Onyx

Silicon dioxide (SiO2)

Yellow Jasper

Cryptocrystalline Quartz (SiO2)

Polished green-and-white jasper (likely ocean jasper or orbicular jasper)

Microcrystalline quartz/chalcedony (SiO₂) with chlorite, epidote, calcite, and iron-oxide inclusions