Sedimentary (Jasper), Mineral (Aquamarine)

Yellow Jasper

Silicon Dioxide (SiO2) with iron hydroxides (Goethite)

Red Jasper

Microcrystalline quartz (SiO2)

Green Jasper

Microcrystalline Quartz (SiO2)

Polished red jasper (likely hematite-bearing jasper)

Jasper, microcrystalline quartz (SiO₂), colored chiefly by iron oxides such as hematite/goethite

Jasper or Agate pendant

Silicon dioxide (SiO2)

River Jasper

Silicon Dioxide (SiO2) with impurities

Ocean Jasper

Orbicular Jasper (Silicon Dioxide, SiO2)

Chert (Pink and Yellow Chert)

Microcrystalline Quartz (SiO2)

Yellow Jasper

Jasper (Silicon Dioxide, SiO2 plus various mineral impurities)

Jasper (Green Jasper/Heliotrope variety)

Silicon Dioxide (SiO2)

Red jasper (likely polished or dyed)

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

Assorted Tumbled Gemstones

Mixed oxides and silicates (including Quartz, Chalcedony, and Feldspar variants)

Yellow Jasper

Jasper (Silicon Dioxide, SiO2)

Yellow Jasper

Silicon Dioxide (SiO2) with iron inclusions

Yellow chalcedony (likely tumbled quartz)

Chalcedony, microcrystalline quartz (SiO₂), colored by iron impurities

Tumbled red jasper (probable)

Microcrystalline quartz/chalcedony, SiO₂, colored by iron oxides

Polished green jasper cabochon (likely serpentine or nephrite imitation)

Jasper: microcrystalline quartz (SiO₂); green coloration may reflect chlorite, epidote, or iron minerals

Mookaite Jasper

Siliceous (chert) sedimentary rock, a form of Jasper

Polished brecciated jasper

Microcrystalline quartz (chalcedony), commonly SiO₂, with iron-oxide and other mineral fragments

Banded ironstone (likely jasper-rich ironstone)

Iron-rich chert/jasper with iron oxides, chiefly hematite and goethite; exact identification requires testing

Leopard Skin Jasper

Orbicular Jasper (Silicon Dioxide, SiO2)

Yellow Jasper

Silicon Dioxide (SiO2) with Iron inclusions

Red Jasper

Silicon Dioxide (SiO2) with hematite inclusions

Polished orbicular jasper

Jasper, a microcrystalline variety of quartz (SiO₂), with iron-oxide and other mineral inclusions

Polished jasper pebble

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

Polished brecciated jasper (likely septarian or iron-rich jasper)

Microcrystalline quartz (chalcedony), SiO₂, with iron oxides and possibly calcite or other rock fragments

Quartz (Chalcedony/Agate nodule)

Silicon dioxide (SiO2)

Jasper

Silicon dioxide (SiO2)

Likely tumbled orange-brown jasper or chert

Microcrystalline quartz (SiO₂), probably iron-oxide-bearing jasper

Yellow Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Yellow Jasper

Chalcedony (SiO2 with iron oxide inclusions)

Brecciated jasper

Silicified microcrystalline quartz (SiO₂), commonly iron-stained and brecciated

Yellow Jasper

Silicon Dioxide (SiO2) with Iron Oxide impurities

Red jasper

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

Heliotrope (Bloodstone)

Silicon Dioxide with Iron Oxide (SiO2)

Banded Jasper (Carnelian Jasper)

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Polished brecciated jasper

Microcrystalline quartz (SiO₂), likely iron-oxide-rich jasper

Green Jasper

Microcrystalline Quartz (SiO2)

Red Jasper

Microcrystalline Quartz (SiO2)

Jasper (likely Polychrome or Ocean Jasper)

Silicon Dioxide (SiO2) with impurities

Jasper (likely brecciated or orbicular jasper)

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

Red Jasper

Silicon Dioxide (SiO2) with Hematite (Fe2O3)