Mineral (Chalcedony Variety)

Yellow Jasper

Silicon Dioxide with Limonite/Goethite inclusions (SiO2)

Banded Jasper / Yellow Jasper with Chlorite or Epidote inclusions

Silicon Dioxide (SiO2) with iron oxide and silicate impurities

Polished brecciated jasper

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

Blue lace agate (likely dyed or color-enhanced)

Microcrystalline quartz (chalcedony), SiO₂

Gray Agate

Chalcedony (Silicon Dioxide, SiO2)

Ocean Jasper

Spherulitic Chalcedony (SiO2 with impurities)

Weathered jasper/chert nodule

Microcrystalline quartz (SiO₂), likely iron- and clay-stained jasper or chert

Banded Agate (Chert/Chaldcedony)

Silicon Dioxide (SiO₂)

Agate (Carnelian Agate with Quartz Matrix)

Silicon Dioxide (SiO2)

Tumbled agate or chalcedony

Microcrystalline quartz, SiO₂

Polished yellow-orange chalcedony (likely carnelian)

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

Tumbled Agate

Silicon Dioxide (SiO2)

Tumbled purple agate (likely amethyst-bearing agate)

Banded chalcedony, a microcrystalline variety of quartz (SiO₂); exact identification is uncertain from the image

Agate (Chalcedony)

Silicon Dioxide (SiO2)

Blue Chalcedony

Silicon Dioxide (SiO2)

Polished agate pendant (likely carnelian or plume agate)

Microcrystalline quartz, SiO₂ (chalcedony); exact variety cannot be confirmed from the image

Polished orbicular jasper (likely ocean jasper)

Microcrystalline quartz/chalcedony, SiO₂, with variable iron-oxide and other mineral inclusions

Agate

SiO2

Orca Agate (Chalcedony)

Silicon Dioxide (SiO2) with inclusions

Agate Nodule / Chalcedony

Silicon Dioxide (SiO2)

Ocean Jasper (Orbicular Jasper)

Silicon Dioxide (SiO2) with iron and other mineral inclusions

Grey Chalcedony

Silicon Dioxide (SiO2)

Tumbled brown jasper

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

Carnelian (a variety of Chalcedony)

Silicon Dioxide (SiO₂)

Carnelian (a variety of Chalcedony)

Silicon Dioxide (SiO2) with iron oxide impurities

Carnelian (a variety of Chalcedony)

SiO2 (Silicon Dioxide) with Iron Oxide impurities

Carnelian (a variety of Chalcedony)

SiO2 (Silicon Dioxide) - Cryptocrystalline Quartz

Carnelian (a variety of Chalcedony)

Silicon Dioxide (SiO2) with Iron Oxide impurities

Carnelian (a variety of Chalcedony)

SiO2 (Silicon Dioxide) primarily colored by iron oxide (Hematite)

Carnelian (a variety of Chalcedony)

SiO2 (Silicon Dioxide with Iron Oxide impurities)

Chalcedony (Carnelian variety)

Silicon Dioxide (SiO2)

Carnelian (a variety of Chalcedony)

Silicon dioxide (SiO2) with iron oxide impurities

Banded Calcite (often sold as Caribbean Calcite or Mexican Onyx)

Calcium Carbonate (CaCO3)

Chalcedony

Silicon Dioxide (SiO2)

Banded Calcite (Onyx Marble / Green Onyx)

Travertine / Banded Calcite (CaCO3)

Tumbled blue chalcedony (probable)

Chalcedony, microcrystalline quartz (SiO₂), possibly blue quartz or dyed chalcedony

Jasper, possibly Brecciated Jasper or Ocean Jasper due to patterns and color

Silicon Dioxide (SiO2), a variety of Chalcedony

Likely quartz-rich stone, possibly milky quartz or chalcedony

Quartz (SiO₂), possibly microcrystalline chalcedony

Leopard Skin Jasper

Chalcedony (cryptocrystalline Quartz)

Chalcedony

Silicon Dioxide (SiO2)

Tumbled brown jasper (likely orbicular or brecciated jasper)

Jasper, microcrystalline quartz/chalcedony; SiO₂

Chalcedony (Agate/Chert variety)

Silicon Dioxide (SiO2)