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

Carnelian

Carnelian (Silicon Dioxide - SiO2)

Polished red jasper (likely brecciated or iron-rich jasper)

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

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

Microcrystalline quartz, SiO₂; coloration may derive from iron oxides

Agate

Silicon dioxide (SiO2) - variety Chalcedony

Quartz Pebble

Silicon Dioxide (SiO2)

Jasper (Red/Brown Variety)

Jasper (Microcrystalline Quartz, SiO2)

Orange Quartz with Hematite inclusions

Quartz (SiO2) with Hematite (Fe2O3) inclusions

Peach Moonstone

Orthoclase (Potassium Aluminum Silicate, KAlSi3O8)

Tumbled brown chalcedony/jasper

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

Jasper and Mixed River Pebbles

Microcrystalline Quartz (Chalcedony / Jasper)

Red jasper (likely brecciated or orbicular jasper)

Microcrystalline quartz, SiO₂, colored mainly by iron oxides

Brecciated jasper (likely ocean jasper or red jasper)

Microcrystalline quartz, SiO₂, with iron-oxide pigments and breccia cement

Polished carnelian/chalcedony

Microcrystalline quartz (SiO₂), likely iron-stained chalcedony

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

Granodiorite

Granodiorite (Intermediate to Felsic Intrusive Rock)

Moss Agate

Silicon Dioxide with inclusions (SiO2 + impurities)

Polished brecciated jasper

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

Fossilized Coral

Hexagonaria (Rugose and Tabulate coral fossils)

Chert (Flint Nodules)

Microcrystalline Quartz (SiO2)

Yellow Jasper

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

Red Jasper

Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions

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)

Chert (often called Flint or Chalcedony Jasper)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Jasper (specifically Picture Jasper or Landscape Jasper)

Silicon Dioxide (SiO2) - Opaque variety of Chalcedony/Quartz

Tumbled jasper or chalcedony pebble

Microcrystalline quartz, SiO₂ (likely jasper/chalcedony)

Chalcedony in Matrix

Silicon Dioxide (SiO2)

Jasper (specifically Fancy Jasper or Bloodstone variety)

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

Polished jasper pebble

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

Chalcedony (Agate Nodule)

Silicon Dioxide (SiO2)

Tumbled orange chalcedony (likely carnelian)

Microcrystalline quartz, SiO₂; iron-bearing variety commonly termed carnelian

Polished agate or chalcedony pebble

Microcrystalline quartz (SiO₂), likely chalcedony/agate

Yellow Calcite

Calcium Carbonate (CaCO3)

Tumbled gray-blue agate/chalcedony

Microcrystalline quartz (SiO₂), likely banded chalcedony or agate

Blue Chalcedony

Silicon Dioxide (SiO2)

Likely tumbled carnelian or orange chalcedony

Microcrystalline quartz, SiO₂ (chalcedony variety)

Chert / Green Jasper

Silicon Dioxide (SiO2)

Tumbled amber-colored chalcedony or jasper

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

Agate (or Chalcedony)

SiO2 (Silicon Dioxide) - a cryptocrystalline variety of quartz