Mineral (Specifically A Mineraloid)

Quartz Crystal (specifically a small Clear Quartz point)

Silicon Dioxide (SiO2)

Chert (specifically a fragment with Desert Varnish)

Microcrystalline quartz (SiO2)

Gneiss (specifically a granitic gneiss cobble)

Gneiss (high-grade regional metamorphic rock)

Agate (specifically a Thunderegg/Agate Nodule)

Cryptocrystalline Quartz (SiO2)

Gneiss (specifically a Granitic Gneiss specimen)

Gneiss (high-grade metamorphic rock primarily composed of Quartz, Feldspar, and Biotite/Amphibole)

Gneiss (specifically a Banded Gneiss cobble)

Gneiss (composed mainly of Quartz, Feldspar, and Biotite/Amphibole)

Chrysoprase

Chrysoprase (a variety of Chalcedony, SiO₂)

Dragon Stone

Argillaceous Sedimentary Rock (Ohko Stone)

Banded Agate (specifically Carnelian Agate)

Silicon dioxide (SiO2) - Chalcedony variety

Granite (specifically Brown Granite Countertop)

Phaneritic Felsic Igneous Rock (Granite-Gabbro series)

Chalcedony (specifically Agate or Flint)

Silicon Dioxide (SiO₂)

Agate (specifically Chalcedony nodule)

Silicon Dioxide (SiO2)

Jasper (specifically Red Jasper)

Silicon Dioxide (SiO2) with iron oxide inclusions

Yellow Jasper

Jasper, a microcrystalline variety of Quartz (SiO2) with iron inclusions

Ocean Jasper (Orbicular Jasper)

Silicon Dioxide (SiO2) with iron and magnesium inclusions

Chert (specifically a weathered Chert nodule or fragment)

Chert; Microcrystalline or Cryptocrystalline Quartz (SiO2)

Agate (specifically a small Chalcedony nodule)

Agate (Cryptocrystalline variety of Quartz, SiO2)

Quartzite (specifically a river-worn cobble)

Quartzite (primarily Silicon Dioxide, SiO2)

Gneiss (specifically a water-worn pebble)

Gneiss

Agate (specifically a Yellow/Honey Agate)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Chert (specifically a flint nodule component)

Microcrystalline quartz (SiO2)

Gneiss (specifically a Banded Gneiss pebble)

Gneiss (High-grade Regional Metamorphic Rock)

Chert (specifically Tan Chert)

Chert (SiO2)

Red Jasper

Jasper (a variety of Chalcedony, SiO₂ with impurities)

Moonstone

Adularia (orthoclase feldspar variety)

Pink Granite

Phaneritic Felsic Igneous Rock (Granite)

Quartz (specifically Clear Quartz with iron/hematite staining)

Silicon Dioxide (SiO2)

Sandstone (specifically Red Sandstone)

Arenite (primarily Quartz, SiO2)

Zebra Jasper

Silicon Dioxide (SiO2) - Macro-crystalline Quartz/Chert with impurities

Quartz (specifically Milky or Rose Quartz)

Silicon Dioxide (SiO2)

Quartz (specifically Clear Quartz or Rock Crystal)

Silicon Dioxide (SiO2)

Quartz Crystal (specifically Rock Crystal)

Silicon Dioxide (SiO2)

Banded Agate (specifically Sardonyx)

Silicon Dioxide (SiO2) - variety of Chalcedony/Quartz

Sandstone (specifically Lithic or Quartz Arenite)

Arenite (composed primarily of SiO2)

Quartz (specifically Milky or Clear Quartz fragment)

Silicon Dioxide (SiO2)

Rutilated Quartz

Quartz (SiO2) with Rutile (TiO2) inclusions

Jasper (specifically Owyhee or Picture Jasper variety)

Jasper (Silicon Dioxide, SiO2)

Banded Agate (specifically Sardonyx Agate)

Silicon Dioxide (SiO2) - Chalcedony variety

Banded Agate (specifically Chalcedony nodule)

Agate (Silicon Dioxide, SiO2)

Quartz (specifically Milky or Clear Quartz)

Silicon Dioxide (SiO2)

Banded Agate (specifically sardonyx or carnelian agate variety)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Agate (specifically, multi-colored or pastel-dyed agate)

Silicon dioxide (SiO2) - specifically, a cryptocrystalline variety of quartz known as Chalcedony, with banding classified as Agate. (If it were Fluorite, the chemical formula would be Calcium Fluoride - CaF2).