Mineral (Man Made Composite)

Green Banded Chert (Agate/Jasper)

Silicon Dioxide (SiO2) with trace impurities of Chlorite or Glauconite

Chert (Flint variety)

Chert (Microcrystalline or Cryptocrystalline Quartz), SiO2

Coquina / Fossiliferous Limestone

Coquina (composed primarily of Calcium Carbonate / CaCO3)

Granite (weathered pebble)

Granite (plutonic igneous rock)

Chert (often called Flint or Jasper if reddish)

Microcrystalline Quartz (SiO2)

Chert (Flint)

Silicon Dioxide (SiO2)

Chert (varieties include Flint and Mudstone)

Microcrystalline Silica (SiO2)

Chert (with Desert Varnish/Iron Stain)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Flint)

Microcrystalline quartz (SiO2)

Clay (as a rock-forming material)

Clay minerals (e.g., Kaolinite group, Smectite group, Illite group, Chlorite group)

Chert (Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Common Opal/Jasper variety)

Cryptocrystalline Quartz (SiO2)

Petoskey Stone

Hexagonaria percarinata (Fossilized Coral)

Chert (often called Flint)

Chert (SiO2)

Basalt

Basalt (Mafic volcanic rock)

Granodiorite

Granodiorite

Granite

Granite (Felsic Plutonic Rock)

Petoskey Stone

Hexagonaria percarinata (Fossilized Rugose Coral)

White Marble

Recrystallized Calcite (CaCO3)

Quartz (Pebble)

Quartz (SiO₂)

Lapis Lazuli

Lapis Lazuli (Complex rock consisting primarily of Lazurite (Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2)

Chert (Flint)

Chert (SiO2)

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Chert (Common Variety, Jasper)

Microcrystalline Quartz (SiO2)

Chert (Yellow Jasper/Flint)

Microcrystalline Quartz (SiO2)

Chert (Nodule)

Chert (Alpha-Quartz, SiO2)

Chert / Flint

Silicon Dioxide (SiO₂)

Chert (Nodule)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Jasper/Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Beaded Jewelry (Assorted Gemstones)

Various minerals, including but not limited to Quartz (SiO2), Garnet (X3Y2(SiO4)3), Jade (Na(Al,Fe)Si2O6), Amethyst (SiO2),等の多様な組み合わせ

Pink Granite

Phaneritic Felsic Intrusive Igneous Rock

Granite Pebble

Felsic intrusive igneous rock

Chert (or Flint)

Chert (cryptocrystalline quartz), SiO2

Banded Chert

Microcrystalline Quartz (SiO2)

Chert

Microcrystalline Silicon Dioxide (SiO2)

Granite

Granitoid (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8 + SiO2)

Red Chert (Jasper)

Cryptocrystalline Quartz (SiO2) with iron oxide inclusions

Petrified Wood

Silicified Wood (SiO2)

Chert (Jasper/Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Flint (or Chert)

Cryptocrystalline Quartz (SiO2)

Quartzite (River Pebble)

Quartzite (Mainly SiO2)

Slag (Industrial Byproduct)

Ferro-silicate glass (Slag)