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

Quartz Pebble

Silicon Dioxide (SiO2)

Polished brown-and-cream jasper

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

Jasper (specifically Fancy Jasper or Bloodstone variety)

Silicon Dioxide (SiO2) with impurities (Iron oxides/silicates)

Fossilized Coral

Hexagonaria (Rugose and Tabulate coral fossils)

Tumbled brown chalcedony (likely carnelian or jasper)

Microcrystalline quartz, SiO₂ (chalcedony variety)

Tumbled blue chalcedony (likely common blue quartz)

Microcrystalline quartz, SiO₂; chalcedony variety

Blue-dyed banded agate

Microcrystalline quartz (SiO₂), chalcedony variety

Blue lace agate (tumbled)

Microcrystalline quartz, SiO₂ (chalcedony variety)

Tumbled Red Jasper

Quartz (Microcrystalline variety of chalcedony, SiO2)

Jasper and Mixed River Pebbles

Microcrystalline Quartz (Chalcedony / Jasper)

Polished red jasper pebble

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

Polished plume agate

Microcrystalline quartz (SiO₂), variety of chalcedony

Orange Quartz with Hematite inclusions

Quartz (SiO2) with Hematite (Fe2O3) inclusions

Tumbled amber-colored quartz/chalcedony (likely carnelian or honey agate)

Microcrystalline quartz, SiO₂; coloration may derive from iron oxides

Polished agate slice

Agate, a banded variety of chalcedony (microcrystalline SiO₂)

Agate (or Chalcedony)

SiO2 (Silicon Dioxide) - a cryptocrystalline variety of quartz

Orange Quartz (or Tumbled Carnelian)

Silicon Dioxide (SiO2) with iron oxide inclusions

Yellow Jasper

Silicon Dioxide (SiO2) with hydrated iron oxide impurities (Goethite)

Chert / Green Jasper

Silicon Dioxide (SiO2)

Granodiorite

Granodiorite (Intermediate to Felsic Intrusive Rock)

Dalmatian jasper (often sold as Dalmatian stone)

Porphyritic quartz monzonite or alkali granite, composed mainly of feldspar and quartz with black aegirine/arfvedsonite amphibole-group minerals

Tumbled banded agate (likely blue lace agate)

Microcrystalline quartz, SiO₂ (chalcedony variety)

Blue chalcedony (likely dyed or polished)

Microcrystalline quartz, SiO₂ (chalcedony variety)

Tumbled chalcedony (likely brown-yellow jasper or agate)

Microcrystalline quartz (SiO₂), chalcedony variety

Blue chalcedony (likely common blue agate)

Microcrystalline quartz, SiO₂; chalcedony variety

Tumbled brown chalcedony/jasper

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

Polished yellow chalcedony pendant (possibly yellow agate)

Microcrystalline quartz, SiO₂; chalcedony variety

Polished carnelian/chalcedony

Microcrystalline quartz (SiO₂), likely iron-stained chalcedony

Dalmatian Stone

Dalmatian Jasper (Aplitic Rock)

Red Jasper

Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions

Red Jasper

Microcrystalline Quartz (SiO2)

Hag Stone

Perforated Sedimentary Rock / Flint / Limestone

Chalcedony (likely carnelian/agate beads or rounded grains)

Microcrystalline quartz, SiO₂; chalcedony varieties

Chert (Jasper)

Microcrystalline Quartz (SiO2)

Yellow Calcite

Calcium Carbonate (CaCO3)

Polished agate or chalcedony pebble

Microcrystalline quartz (SiO₂), likely chalcedony/agate

Chalcedony (Agate Nodule)

Silicon Dioxide (SiO2)

Polished agate (likely carnelian or dyed red agate)

Chalcedony, microcrystalline quartz (SiO₂)

Tumbled banded agate

Chalcedony (microcrystalline quartz), SiO₂

Polished brecciated jasper

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

Likely tumbled carnelian or orange chalcedony

Microcrystalline quartz, SiO₂ (chalcedony variety)

Ocean Jasper

Spherulitic Chalcedony (SiO2)