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

Dyed and polished agate heart

Microcrystalline quartz (chalcedony), SiO₂; likely druzy quartz inclusions

Polished Jasper Sphere

Silicon Dioxide (SiO2) with iron and other mineral inclusions

Tumbled yellow-orange jasper

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

Blue Agate Geode (Dyed)

Cryptocrystalline Quartz (SiO2)

Blue Lace Agate

Silicon Dioxide (SiO₂)

Dendritic Agate or Moss Agate Nodules (Septarian-like)

Chalcedony with mineral inclusions (SiO2)

Jasper (Tiger Eye variety transition)

Silicon Dioxide (SiO2) with iron oxide inclusions

Banded agate (chalcedony)

Microcrystalline quartz, SiO₂; agate variety of chalcedony

Moss Agate

Silicon Dioxide (SiO2) with inclusions

Jasper

Silicon Dioxide (SiO2) - Impure Variety of Chert

Tumbled brown jasper

Microcrystalline quartz (chalcedony), chiefly SiO₂, colored by iron oxides and other inclusions

Yellow Chalcedony (Agate/Chert)

Cryptocrystalline Quartz (SiO2)

Chalcedony (Agate/Carnelian variety)

Cryptocrystalline Quartz (SiO2)

Polished blue chalcedony (likely blue agate)

Cryptocrystalline quartz, SiO₂; chalcedony variety

Polished agate with druzy quartz

Microcrystalline chalcedony (SiO₂) with crystalline quartz and iron-oxide inclusions

Honey-colored quartz-rich stone, possibly chert or chalcedony

Microcrystalline silica (SiO₂), identification uncertain from photograph

Carved jasper bear figurine

Jasper, microcrystalline quartz (SiO₂), likely brecciated or orbicular jasper

Swirled Agate Bead

Silicon Dioxide (SiO2)

Chalcedony (likely carnelian/agate beads or rounded grains)

Microcrystalline quartz, SiO₂; chalcedony varieties

Picture Jasper (specifically Biggs or Deschutes variety)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Yellow chalcedony (likely agate) cabochons

Microcrystalline quartz, SiO₂; chalcedony variety, possibly naturally colored or dyed

Jadeite

Jadeite (NaAlSi2O6)

Jasper

Jasper (Silicon Dioxide, SiO2)

Agate Nodule

Silicon dioxide (Chalcedony/Quartz), SiO2

Tumbled green jasper (probable)

Jasper, opaque microcrystalline quartz (SiO₂), colored by iron and other impurities

Polished brown jasper (probable picture jasper)

Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide inclusions

Tumbled agate or chalcedony (probable)

Microcrystalline quartz, SiO₂

Raw carnelian/chalcedony

Microcrystalline quartz (SiO₂), orange chalcedony with iron-oxide coloration

White Agate (Chalcedony)

Chalcedony (SiO2)

Polished carnelian/chalcedony nodule

Microcrystalline quartz (SiO₂), orange-red chalcedony variety

Jasper (specifically Yellow or Bumblebee-like Jasper)

Silicon Dioxide (SiO2) with impurities

Red jasper-like chalcedony pebble

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

Chert (Jasper influence)

Microcrystalline Quartz (SiO2)

Tumbled chalcedony (likely yellow/brown jasper or agate)

Microcrystalline quartz, SiO₂ (chalcedony; variety uncertain)

Yellow Agate

Silicon Dioxide (SiO2)

Red jasper (likely brecciated jasper)

Microcrystalline quartz/chalcedony, SiO₂, colored mainly by iron oxides

Yellow Jasper

Silicon Dioxide (SiO2) with Goethite/Limonite inclusions

Polished banded agate (likely carnelian and black agate)

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

Red-orange carnelian

Carnelian, a translucent chalcedony variety of quartz (SiO₂)

Tumbled chalcedony (likely carnelian or brown agate)

Microcrystalline quartz, SiO₂; chalcedony with iron-oxide coloration

Chert Pebble/Nodule

Chert (a microcrystalline or cryptocrystalline sedimentary form of quartz, SiO2)

Polished red jasper pebble

Jasper, microcrystalline quartz (SiO₂) colored mainly by hematite/goethite