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

Red jasper pebble

Microcrystalline quartz (SiO₂), colored by iron oxides; possibly brecciated jasper

Tumbled red jasper (probable)

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

Weathered jasper (iron-stained chert)

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

Jasper with Quartz

Silicon dioxide (SiO2)

Weathered jasper/chert nodule

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

Banded agate (chalcedony)

Microcrystalline quartz (SiO₂), variety chalcedony

Dragon Blood Jasper

Epidote-rich Quartzite (SiO2 with Ca2(Al,Fe)3(SiO4)3(OH))

Chalcedony on Matrix

Silicon Dioxide (SiO2)

Jasper (specifically Chert or Orbicular Jasper)

Silicon Dioxide (SiO2)

Chalcedony (Botryoidal/Agate nodule)

Microcrystalline Quartz (SiO2)

Agate

SiO2

Jasper

Silicon dioxide (SiO2)

Tumbled brown jasper

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

Tumbled chalcedony or agate

Microcrystalline quartz (SiO₂), likely pale agate/chalcedony

Chalcedony (or a variety of Chalcedony, likely Agate or Jasper)

Chalcedony (SiO₂)

Tumbled jasper or chert

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

Tumbled brown agate (probable)

Microcrystalline quartz, SiO₂ (chalcedony/agate)

Tumbled jasper (likely brecciated or mahogany jasper)

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

Oceanside Agate (Orbicular Agate)

Silicon Dioxide (SiO2) - Variety of Chalcedony

Red Jasper Pebble

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Red Jasper

Argillaceous microcrystalline quartz (SiO2 with Fe2O3 inclusions)

Tumbled green agate (likely moss or chalcedony agate)

Cryptocrystalline quartz, SiO₂; likely green chalcedony with possible chlorite or iron inclusions

Tumbled jasper (likely brown/yellow jasper)

Microcrystalline quartz, SiO₂, typically with iron-oxide and clay impurities

Tumbled jasper or weathered chert

Microcrystalline quartz (SiO₂), likely jasper/chert with iron-oxide impurities

Tumbled green jasper (probable)

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

Red jasper fragment

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

Likely tumbled jasper or agate

Microcrystalline quartz (SiO₂), possibly iron-rich jasper

Red Jasper (with Chert/Quartz)

Silicon Dioxide (SiO2)

Tumbled brown jasper (likely orbicular or brecciated jasper)

Jasper, microcrystalline quartz/chalcedony; SiO₂

Quartz (specifically a water-worn Quartzite or Chalcedony pebble)

Silicon Dioxide (SiO2)

Polished brown-and-cream jasper

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

Agate (Polished Sphere)

Silicon Dioxide (SiO2)

Orange Quartz (or Tumbled Carnelian)

Silicon Dioxide (SiO2) with iron oxide inclusions

Banded Agate

Silicon Dioxide (SiO2) - Chalcedony Variety

Brecciated Red Jasper

Microcrystalline Quartz (Chalcedony), SiO2

Polished red jasper pebble

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

Rainbow Moonstone

White Labradorite (formula: (Na,Ca)(Al,Si)4O8)

Blue lace agate (likely dyed or color-enhanced)

Microcrystalline quartz (chalcedony), SiO₂

Quartz (Chalcedony)

Silicon Dioxide (SiO2)

Tourmalinated Quartz

Silicon dioxide (SiO2) with inclusions of Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)3OH)

Chert (specifically Yellow Jasper variety)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Red Jasper (in Quartz/Chalcedony)

Silicon Dioxide (SiO2) with iron oxide inclusions