Man Made Glass (Often Grouped With Minerals In Lapidary)

Veined Quartz

SiO2 (Silicon Dioxide)

Chert (or Chalcedony)

Chert (Microcrystalline Quartz, SiO2)

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Chert (Flint)

Microcrystalline Quartz (SiO2)

Quartzite (Ferruginous)

Metamorphosed Quartz Sandstone (SiO2 with Fe2O3 inclusions)

Pink Quartzite

Quartzite (primarily SiO2)

Quartzite pebble

Quartzite (primarily SiO2)

Red Quartzite (River Stone)

Quartzite (primarily SiO2)

Green Calcite

Calcite (CaCO3)

Celestine (Celestite)

Strontium sulfate (SrSO4)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3/FeO(OH)) inclusions

Quartzite

Metamorphosed Quartz Sandstone (SiO2)

Chert (Yellow Jasper variant)

Silicon Dioxide (SiO2)

Quartz (likely) / Siliceous rock with quartz phenocrysts (if a rock fragment)

Quartz (SiO₂)

Chert (Yellow Jasper)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Red Quartzite / Ferruginous Quartz

Quartzite (primarily Silicon Dioxide, SiO2 with Iron Oxide impurities)

Red Jasper

Jasper (Silicon Dioxide Si₂O₃)

Sandstone

Quartz Arenite (a type of sandstone composed of more than 90% quartz)

Lepidolite

K(Li,Al)3(Al,Si)4O10(F,OH)2 (Lithium-bearing phyllosilicate)

Jasper

Silica (SiO2) with impurities

Chert (specifically Flint or Common Opal/Chalcedony mix)

Microcrystalline Quartz (SiO2)

Chert (Jasper variation)

Silicon Dioxide (SiO2)

Chert (Green variety)

Silicon Dioxide (SiO2)

Apache Tears (Obsidian)

Hydrated Volcanic Glass (Amorphous SiO2 + H2O)

Tektite (Indochinite)

Tektite (High-silica natural glass)

African Turquoise (Jasper)

Polychrome African Jasper (often marketed as 'African Turquoise' due to its color, but it is not true turquoise)

Chert (Iron-stained)

Chert (Silicon Dioxide, SiO2)

Variscite (or potentially a turquoise/variscite matrix cabochon, or an impression jasper)

AlPO4·2H2O (Variscite) or related phosphate/silicate material depending on exact composition

Quartzite River Rock

Quartzite (SiO2)

Jasper

Silicon Dioxide (SiO₂)

Milky Quartz Pebble

Silicon Dioxide (SiO2)

Green Quartzite (Aventurine-like)

Quartzite (primarily SiO2 with trace Fuchsite mica inclusions)

River Cobble (likely Quartzite or Chert)

Quartzite (SiO2)

Zircon

Zircon (ZrSiO4)

Red Quartzite

Quartzite (SiO2 with iron oxide inclusions)

Purple Jasper

Silica-rich Microcrystalline Quartz (SiO2)

Amazonite with Smoky Quartz and Feldspar

Microcline (KAlSi3O8) with Quartz (SiO2)

Chert (Nodule)

Crystalline Silicon Dioxide (SiO2)

Jasper in Quartzite (likely Cinnabar or Iron inclusions)

Silicon dioxide (SiO2) with impurities

Quartz River Cobble (Yellow Jasper/Quartzite variant)

Quartzite (primarily Silicon Dioxide, SiO2)

Mother of Pearl (Nacre)

Calcium Carbonate (primarily aragonite, with conchiolin)