Synthetic Polymer (Synthetic Material)

Chert / Flint

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert

Chert (SiO2)

Chert (Flint)

Chert (Silicon Dioxide, SiO2)

Chert / Flint

Microcrystalline or cryptocrystalline quartz (SiO2)

Chert (Jasper variety)

Chert (Silicon Dioxide, SiO2)

Chert (and Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Flint)

Silicon Dioxide (SiO2)

Chert (specifically Yellow Jasper)

Sedimentary Cryptocrystalline Quartz (SiO2)

Chert (Arrowhead Preform)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Milky Quartz

Silicon Dioxide (SiO2)

Chert / Pink Flint

Cryptocrystalline Quartz (SiO2)

Chert (Jasper variety)

Silicon Dioxide (SiO2)

Chert (Iron-stained)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (including Flint and Jasper variants)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (often called Flint or Jasper based on color)

Microcrystalline Silica (SiO2)

Conglomerate with Fossilized Shark Teeth

Clastic sedimentary rock (Conglomerate) containing Elasmobranchii remains

Chert (Gravel)

Microcrystalline silica (SiO2)

Chert (Nodule)

Microcrystalline Quartz (SiO2)

Micro-crystalline Quartz Pebble (Chert)

Silicon dioxide (SiO2)

Nuummite

Nuummite (Orthorhombic amphiboles: Anthophyllite and Gedrite)

Granite

Granitic intrusive igneous rock

Diamond

Diamond (C)

Diamond

Diamond (C)

Granite

Phaneritic Felsic Igneous Rock

Chert (specifically Flint or Dark Chalcedony)

Silicon Dioxide (SiO2)

Chert / Flint

Microcrystalline Silica (SiO2)

Leopard Skin Jasper

Rhyolite (Silicon Dioxide with impurities), SiO2

Diamond (Princess Cut)

Carbon (C)

Chert (specifically Blue Chert or Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (includes Flint & Jasper)

Chert (Siliceous sedimentary rock, chemical formula SiO2)

Chert (Field Pebble)

Microcrystalline / Cryptocrystalline Quartz (SiO2)

Chert (varietal Flint)

Silicon Dioxide (SiO2)

Chert (often called Flint)

Microcrystalline Quartz (SiO2)

Glauconitic Sandstone (or Greensand)

Glauconitic Siliciclastic Rock (Containing (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2)

Tiffany Stone

Bertrandite Fluorite (CaF2 + Be4Si2O7(OH)2)

Quartzite Arrowhead (Archaeological Lithic)

Recrystallized Quartz (SiO2)

Chondrite Meteorite

Ordinary Chondrite (Fe-Ni alloy, Olivine, Pyroxene)

Limestone

Calcium Carbonate (CaCO3)

Sandstone (Red/Brown Variety)

Arenite (composed primarily of SiO2 with Fe2O3 iron oxide inclusions)

Basalt with Quartz/Feldspar Vein

Amygdaloidal Basalt with Plutonic intrusion (SiO2/KAlSi3O8)

Slate

Slate (Foliated Metamorphic Rock)

Banded Calcite (often sold as 'Ocean Jasper' or 'Caribbean Calcite' variant)

Calcium Carbonate (CaCO3) with potential Aragonite inclusions