Sedimentary Rock (Technically A Variety Of Chalcedony)

Flint or chert fragment

Microcrystalline quartz (SiO₂), likely flint/chert

Jasper (Iron-stained Chert)

Silicon Dioxide (SiO2) with impurities of Iron Oxide

Red jasper

Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides

Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Yellow Jasper

Silicon Dioxide (SiO2) with Goethite/Limonite inclusions

Agate (or Quartz with Agate banding)

Silicon dioxide (SiO2)

Chert (Gray Chalcedony)

Microcrystalline Quartz (SiO2)

Jasper-Agate

Silicon Dioxide (SiO2)

Banded Jasper (Chert)

Silicon Dioxide (SiO2) - variety of Chalcedony

Jasper

Jasper (Cryptocrystalline variety of Quartz, SiO2)

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Red Jasper with Quartz Veining

Silicon Dioxide (SiO2) - Microcrystalline Quartz with Iron Oxide impurities (Hematite)

Jasper (likely Lake Superior Jasper)

Jasper (Silicon Dioxide, SiO2)

Tumbled yellow jasper or silicified rock fragment

Microcrystalline quartz (chalcedony), SiO₂, likely iron-oxide colored

Jasper and Quartz conglomerate (River Rock)

Silicon Dioxide (SiO2) - Chalcedony and Quartz variety

Chalcedony (Agate/Chert variety)

Silicon Dioxide (SiO2)

Chalcedony

Silicon Dioxide (SiO2)

Red Jasper

Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)

Dyed Fuchsia Agate

Silicon Dioxide (SiO2) - variety Chalcedony

Jasper

Jasper (Silicon Dioxide, SiO2)

Chert or chalcedony nodule

Microcrystalline quartz (SiO₂), possibly weathered chert

Chert (Flint / Chalcedony variety)

Microcrystalline Quartz (SiO2)

Chalcedony

Silicon Dioxide (SiO2)

Jasper

SiO2 (Silicon Dioxide)

Jasper Pendant

Silicon dioxide (SiO2) with impurities

Yellow Quartz (Chalcedony)

Silicon Dioxide (SiO2)

Yellow jasper (likely iron-rich chert)

Microcrystalline quartz, SiO₂, colored by iron oxides/hydroxides

Jasper (Iron-stained Quartz)

Silicon dioxide (SiO2) with iron oxide inclusions

Polished red jasper beads

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

Polished orbicular jasper

Microcrystalline quartz (SiO₂) with iron-rich and altered volcanic inclusions

Polished carnelian

Carnelian, a reddish-orange cryptocrystalline chalcedony (SiO₂), colored mainly by iron oxides.

Jasper with Agate Inclusions

Jasper (Silicon Dioxide, SiO2) with Chalcedony/Agate

Polished brecciated jasper (likely Apache tear–type iron-rich jasper)

Jasper, microcrystalline quartz (SiO₂), colored by hematite/goethite and other iron oxides

Jasper and Quartz River Cobble

Silicon Dioxide (SiO2) with Hematite inclusions

Jasper or Agate

Silicon dioxide (SiO2)

Chert / Flint (a variety of Chert)

Chert (SiO2)

Rainbow Moonstone

White Labradorite (Plagioclase Feldspar, (Na,Ca)(Al,Si)4O8)

Red Jasper

Jasper (Silicon Dioxide, SiO2 with Fe2O3 inclusions)

Blue Chalcedony

Silicon Dioxide (SiO2)

Polished agate (likely moss or plume agate)

Microcrystalline quartz, primarily chalcedony (SiO₂), with possible iron-oxide inclusions

Jasper

Jasper (Silica/Silicon Dioxide, SiO2)

Orange chert or jasper fragment

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