Mineral (Specifically A Variety Of Chalcedony, Which Is Microcrystalline Quartz)

Chert (Golden/Yellow Variety)

Microcrystalline Silica (SiO2)

Sandstone (likely Greywacke or Siltstone variety)

Arenite / Siltstone (primarily SiO2)

Chert (specifically Tan/Yellow Chert)

Silicon Dioxide (SiO2)

Quartzite

Quartzite (SiO2)

Quartz (variety of colors)

SiO2 (Silicon Dioxide)

Carnelian (Chalcedony)

Silicon Dioxide (SiO2)

Bi-Color Tourmaline (or Watermelon Tourmaline)

Tourmaline (complex borosilicate mineral group with general formula AD3G6(BO3)3T6O18(OH,O)4)

Pink Granite

Phaneritic Felsic Igneous Plutonic Rock

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Chert (Jasper/Flint variety)

Microcrystalline quartz (SiO2)

Chert (Jasper/Agate variety)

Microcrystalline quartz (SiO2)

Chert (Jasper/Agate variety)

Microcrystalline Quartz (SiO2)

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Chert (Jasper/Flint variety)

Microcrystalline quartz (SiO2)

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Chert (Jasper/Agate variety)

Microcrystalline Quartz (SiO2)

Chert (Jasper/Agate variety)

Microcrystalline Quartz (SiO2)

Chert (Basanite / Flint variety)

Microcrystalline Quartz (SiO2)

Chert (Jasper/Agate variety)

Microcrystalline Quartz (SiO2)

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Chert (Jasper/Agate variety)

Microcrystalline Quartz (SiO2)

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Chert (Jasper/Agate variety)

Microcrystalline Quartz (SiO2)

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Chert (Red/Brown Variety)

Microcrystalline quartz (SiO2)

Chert (Flint/Jasper variety)

Microcrystalline Quartz (SiO2)

Chert (Flint Nodular Variety)

Microcrystalline Quartz (SiO2)

Sandstone Concretion

Clastic sedimentary rock (primarily Quartz SiO2)

Carnelian (Chalcedony)

Silicon Dioxide (SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Quartzite Pebbler

Quartzite (primarily SiO2)

Chert (variously identified as Flint)

Microcrystalline Quartz (SiO2)

Chert (Iron-stained)

Microcrystalline Quartz (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Ferruginous Quartzite (Red Sandstone/Quartzite)

Quartzite with Iron inclusions (SiO2 + Fe2O3)

Carnelian Agate

Chalcedony (Silicon Dioxide, SiO2)

Fluorite

Fluorite (CaF₂)

Snowflake Obsidian

Volcanic glass (SiO2 - Silicon Dioxide with Cristobalite inclusions)

Quartzite pebble

Quartzite (SiO2)

Chert (Flint)

Microcrystalline Quartz (SiO2)