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

Tiger's Eye

Tiger's Eye (a variety of Chalcedony, which is cryptocrystalline quartz). Chemical Formula: SiO2 with inclusions of crocidolite fibers.

Tumbled orange chalcedony or carnelian

Microcrystalline quartz (SiO₂), likely iron-stained chalcedony

Chert (Jasper)

Microcrystalline Quartz (SiO2)

Dalmatian Stone

Dalmatian Jasper (Aplitic Rock)

Milky Quartz or Moonstone

Silicon Dioxide (SiO2) or Potassium Aluminum Silicate (KAlSi3O8)

Honey-colored chalcedony (likely carnelian)

Microcrystalline quartz, SiO₂; orange chalcedony colored by iron oxides

Agate Geode Nodule

Chalcedony / Quartz (SiO2)

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

Red Jasper

Microcrystalline Quartz (SiO2)

Tumbled brown agate (possible carnelian or chalcedony)

Microcrystalline quartz, SiO₂; agate is banded chalcedony

Tumbled carnelian (likely)

Carnelian, orange-red variety of cryptocrystalline silica (SiO₂), chalcedony

Polished chalcedony (likely moss or dendritic agate)

Microcrystalline quartz, SiO₂, with iron/manganese oxide inclusions

Tumbled jasper, likely red/brown jasper

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

Polished agate (likely carnelian or dyed red agate)

Chalcedony, microcrystalline quartz (SiO₂)

Tumbled banded agate

Chalcedony (microcrystalline quartz), SiO₂

Hag Stone

Perforated Sedimentary Rock / Flint / Limestone

Chrysocolla in Quartz

Chrysocolla (Cu,Al)2H2Si2O5(OH)4·nH2O in Quartz (SiO2)

Polished carnelian (likely)

Carnelian, a reddish-orange cryptocrystalline quartz variety; SiO₂

Iron-stained jasper/chert fragment

Microcrystalline quartz (SiO₂), likely hematite/goethite-bearing jasper

Tumbled jasper (likely)

Microcrystalline quartz, SiO₂; likely jasper, a variety of chalcedony

Green Chalcedony (likely Green Agate or Chrysoprase)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Tumbled banded agate

Chalcedony (microcrystalline quartz), SiO₂

Geode

Quartz / Chalcedony nodule

Tumbled red-and-cream jasper

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

Chalcedony (variations like Agate or Jasper)

Chalcedony (SiO₂ - microcrystalline quartz)

Tumbled yellow-orange chalcedony (likely carnelian)

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

Red jasper (polished/cut rough)

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

Agate (specifically crazy lace agate / orbicular agate node)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Red jasper (likely iron-rich chert)

Microcrystalline quartz, SiO₂, colored mainly by hematite/goethite

Red/orange chalcedony (carnelian), possibly dyed or heat-treated

Chalcedony, cryptocrystalline SiO₂ (quartz variety)

Tumbled brown stone, likely jasper or chert

Microcrystalline quartz (SiO₂), probably iron-stained jasper/chert

Tumbled purple agate (likely amethyst-bearing agate)

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

Tumbled agate or chalcedony (probable)

Microcrystalline quartz, SiO₂

Yellow chalcedony or quartz fragment

Microcrystalline quartz, SiO₂ (tentative; possibly iron-stained chalcedony)

Red Jasper with Quartz

Microcrystalline Quartz (SiO2)

Tumbled amber-colored agate or chalcedony

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

Carnelian

Chalcedony (cryptocrystalline quartz), SiO2 (Silicon Dioxide)

Orange chalcedony or tumbled carnelian fragment

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

Ocean Jasper

Spherulitic Chalcedony (SiO2)