Quartzite (River Pebble)

Metamorphic rock consisting primarily of Quartz (SiO2)

metamorphic

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

sedimentary

Jasper

Silicon Dioxide (SiO2)

sedimentary

Basalt with Epidote Veining

Basalt (Mafic Extrusive Rock) with Ca2(Al,Fe)3(SiO4)3(OH)

igneous

Jasper

Jasper (Silicon Dioxide, SiO2)

sedimentary

Milky Quartz (with potential inclusion)

Silicon Dioxide (SiO2)

mineral

Granite Cobble

Granite (Phaneritic Quartz-Feldspar Felsic Rock)

igneous

Milky Quartz

Silicon Dioxide (SiO2)

mineral

Granodiorite (Riverbed Cobble)

Granodiorite

igneous

Basalt

Basalt (Aphanitic Mafic Volcanic Rock)

Igneous

Hematite

Iron(III) oxide (Fe2O3)

mineral

Milky Quartz

Silicon Dioxide (SiO2)

mineral

Libyan Desert Glass

Tektite (high-silica impact glass), SiO2 + tracing minerals

mineraloid / impactite

Yellow Quartz (Citrine-colored Quartz)

Silicon Dioxide (SiO2)

mineral

Ocean Jasper

Orbicular Jasper (Silicon Dioxide, SiO2)

mineral

Scoria (Vesicular Basalt)

Vesicular Basalt

igneous

Porphyry (Flower Stone)

Porphyry (Andesite or Basalt matrix)

igneous

Moonstone

Orthoclase (Potassium Aluminum Silicate, KAlSi3O8)

mineral

Red Jasper

Jasper (Silicate Mineral - SiO2)

sedimentary

Smoky Quartz

Silicon Dioxide (SiO2)

mineral

Dendritic Agate

Silicon Dioxide (SiO2) with inclusions

mineral

Amber

Succinite

mineral

Basalt with Epidote (Greenstone)

Epidote-bearing Metabasalt

metamorphic

Tektite (Indochinite)

Tektite (natural glass, SiO2 + Al2O3)

mineral

Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

metamorphic

Red Jasper

Silicon Dioxide with Iron inclusions (SiO2)

sedimentary

Dragon Vein Agate

Chalcedony (cryptocrystalline silica, SiO2) variety Agate

mineral

Quartzite Pebbler

Quartzite (primarily SiO2)

metamorphic

Schist with Garnet inclusions

Garnet-mica-schist

metamorphic

Labradorite

Labradorite, (Ca, Na)(Al, Si)4O8

mineral

Jasper

Jasper (Silicon Dioxide, SiO2)

sedimentary

Ferruginous Quartz (River Pebble)

Silicon Dioxide (SiO2) with Iron Oxide inclusions

mineral

Greenstone / Quartzite Pebble

Metamorphosed Quartz-rich Rock

metamorphic

Picture Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

sedimentary

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

mineral

Polychrome Jasper

Silicon Dioxide (SiO2) with iron and other mineral inclusions

sedimentary

Chalcedony (Carnelian/Agate variety)

Silicon Dioxide (SiO2) with trace hematite/iron impurities

mineral

Jasper

Jasper (Silicon Dioxide, SiO2)

sedimentary

Jasper

Jasper (Silicon Dioxide, SiO2)

sedimentary

Yellow Quartz (Citrine-colored Quartz Pebble)

Silicon Dioxide (SiO2)

mineral

Yellow Jasper

Silicon dioxide (SiO2) with iron oxide inclusions

sedimentary

River Stone (Granitic Gneiss)

Foliated Granitic Gneiss

metamorphic