Sedimentary (Volcanic)

Yellow Jasper

Silicon Dioxide (SiO2) with goethite/iron oxide inclusions

Banded Agate (with possible Chalcedony layers)

Silicon dioxide (SiO2)

Tree Agate

Silicon Dioxide (SiO2) with Chlorite inclusions

Petrified Wood

Silicified Wood (SiO2)

Quartz Geode

Crystalline Silicon Dioxide (SiO2) in Geode form

Jasper (Iron-stained Quartzite/Chert)

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) impurities

Petrified Wood

Silicified Wood (SiO2)

Fancy Jasper (Ocean Jasper or River Jasper variant)

Silicon Dioxide with inclusions (SiO2)

Jasper (specifically Red Jasper/Chert)

Silicon Dioxide (SiO2) with iron oxide inclusions

Yellow Jasper

Jasper, a microcrystalline variety of Quartz (SiO2) with iron inclusions

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide impurities

Jasper (Red Jasper)

Jasper (SiO2 - Silicon Dioxide with iron inclusions)

Red Jasper

Chalcedony (SiO2 with Iron inclusions)

Agate (River Pea)

Microcrystalline Chalcedony (SiO2)

Jasper

Jasper (Silicon Dioxide, SiO2)

Red Jasper

Chalcedony (SiO2 with iron oxide impurities)

Chert (Jasper-rich)

Microcrystalline/Cryptocrystalline Quartz (SiO2)

Quartz Geode

Silicon Dioxide (SiO2)

Agate

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Yellow Jasper

Silicon Dioxide (SiO2) with impurities of Iron or Goethite

Fancy Jasper (Mookaite style)

Silicon Dioxide (SiO2) with iron oxide impurities

Red Jasper

Silicon Dioxide (SiO2) with Iron inclusions

Green Jasper

Silicon Dioxide (SiO2) with impurities

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Yellow Jasper

Jasper (Silicon Dioxide with Iron Oxide impurities, SiO2)

Red Jasper

Silicon Dioxide (SiO2) with Hematite impurities

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Red Jasper

Silicon Dioxide (SiO2) with Hematite impurities

Green Jasper

Silicon Dioxide (SiO2) with iron silicate inclusions

Red Jasper

Jasper (Silicon Dioxide, SiO2 with iron oxide impurities)

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Red Jasper

Jasper (Silicon Dioxide with Iron Oxide inclusions), SiO2

Yellow Jasper

Silicon Dioxide (SiO2) with iron hydroxides

Red Jasper

Jasper (Silica/Silicon Dioxide, SiO2 plus iron inclusions)

Agate Geode

Silicon Dioxide (SiO2) - variety Chalcedony/Quartz

Red Jasper (Chert)

Silicon Dioxide (SiO2) with iron oxide inclusions

Jasper (Iron-rich)

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) impurities

Red Jasper

Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)

Yellow Chalcedony (Agate Pebble)

Silicon Dioxide (SiO2)

Jasper

Silicon Dioxide (SiO2) with impurities (mostly Iron Oxides)

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions