Mineralish (Variety Of Chalcedony)

Agate (Carnelian-Blue Agate mix)

Silicon Dioxide (SiO2)

Yellow Jasper

Jasper (Silica-rich Microcrystalline Quartz, SiO2 with Iron impurities)

Jasper

Quartz (SiO2) with impurities

Jasper (Multi-color Chert)

Silicon Dioxide (SiO2) with impurities

Jasper

Jasper (Silicon Dioxide, SiO2)

Agate

Silicon dioxide (SiO2)

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Agate (Chalcedony Variation)

Silicon Dioxide (SiO2)

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Jasper (brecciated or orbicular variety)

Silicon dioxide (SiO2) with iron oxide inclusions

Jasper (Red Jasper)

Silicon Dioxide (SiO₂)

Red Jasper

Jasper (Silicon Dioxide, SiO2)

Yellow Jasper

Silicon Dioxide (SiO2)

Chert (Chalcedony/Quartz)

Microcrystalline Silicon Dioxide (SiO2)

Polished brecciated jasper (likely)

Jasper, microcrystalline quartz (SiO₂), with contrasting mineral fragments or veins

Blue-green agate bead bracelet

Chalcedony (microcrystalline quartz, SiO₂), likely dyed blue-green

Polished leopard-skin jasper

Jasper (microcrystalline quartz, SiO₂), commonly orbicular or brecciated varieties

Red jasper (likely)

Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored by iron oxides

Polished brown stone, possibly jasper

Likely iron-rich microcrystalline quartz (SiO₂); exact identification is uncertain from the image

Likely banded agate or chalcedony

Microcrystalline quartz (SiO₂), possibly iron-stained agate

Polished carnelian

Carnelian, a red-orange variety of chalcedony (microcrystalline quartz, SiO₂)

Orange chalcedony (likely carnelian)

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

Polished brown jasper (probable ocean jasper or iron-rich jasper)

Microcrystalline quartz/chalcedony, SiO₂, colored by iron oxides and other inclusions

Tumbled brown agate

Chalcedony (microcrystalline quartz), SiO₂, with iron-oxide coloration

Polished dark chalcedony or agate cabochon

Cryptocrystalline quartz, SiO₂; likely brown-red chalcedony/agate

Tumbled carnelian (likely)

Cryptocrystalline quartz, SiO₂; reddish chalcedony colored mainly by iron oxides

Tumbled brown agate (probable)

Microcrystalline quartz, SiO₂ (chalcedony/agate)

Tumbled brown jasper

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

Red jasper

Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides

Polished carnelian (banded agate)

Chalcedony, microcrystalline quartz (SiO₂), likely iron-stained banded agate

Tumbled orange chalcedony (probable carnelian)

Cryptocrystalline quartz, SiO₂; reddish-orange variety commonly called carnelian

Agate

SiO2

Tumbled red jasper (likely)

Jasper, microcrystalline quartz/chalcedony (SiO₂), colored mainly by iron oxides

Jasper / Chert (Tumbled)

Microcrystalline Quartz (SiO2)

Tumbled jasper

Microcrystalline quartz (SiO₂), commonly iron-oxide-bearing chalcedony

Tumbled brown jasper

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

Banded Calcite (Mexican Onyx)

Banded Calcite (CaCO3)

Quartz (Chalcedony/Agate)

Silicon Dioxide (SiO2)

Banded Agate

Agate (Silicon Dioxide, SiO2)

Agate (Beaded Jewelry)

Silicon Dioxide (SiO2)

Jasper Pebble

Microcrystalline Quartz (SiO2)

Polished agate/geode fragment

Microcrystalline quartz (chalcedony), SiO₂, with possible calcite or quartz cavity lining