Mineral (Specifically A Mineraloid)

Banded Agate (specifically Carnelian Agate / Sardonyx)

Silicon Dioxide (SiO2) with iron oxide inclusions

Hag Stone

Perforated Sedimentary Rock (Typically Limestone or Sandstone)

Quartz (specifically Milky or Clear Quartz fragment)

Silicon Dioxide (SiO2)

Sandstone (specifically Red Sandstone)

Arenite (primarily Quartz, SiO2)

Quartz (specifically Milky or Rose Quartz)

Silicon Dioxide (SiO2)

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).

Banded Agate (specifically sardonyx or carnelian agate variety)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Banded Agate (specifically Chalcedony nodule)

Agate (Silicon Dioxide, SiO2)

Banded Agate (specifically Sardonyx Agate)

Silicon Dioxide (SiO2) - Chalcedony variety

Quartz (specifically Milky or Clear Quartz)

Silicon Dioxide (SiO2)

Quartz (specifically Milky Quartz or Quartzite)

Silicon Dioxide (SiO2)

Moonstone (specifically White Moonstone or Girasol Quartz)

Potassium aluminum silicate (KAlSi3O8)

Agate (specifically Carnelian Agate or Lake Superior style Agate)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Banded Agate (specifically Sardonyx or Black Agate variety)

Silicon Dioxide (SiO2) - Chalcedony / Cryptocrystalline Quartz

Chalcedony (specifically Agate or Common Opal variety)

Cryptocrystalline Silica (SiO2)

Quartz (Specifically Clear to Smoky Quartz point)

Silicon Dioxide (SiO2)

Blue Quartz (specifically Dumortierite Quartz)

SiO2 (Silicon Dioxide) with inclusions of AlAl6BSi3O18 (Dumortierite)

Banded Agate (specifically Botswana Agate or Water-line Agate)

Chalcedony (cryptocrystalline variety of Quartz), SiO2

Banded Agate (specifically Botswana Agate appearance)

Silicon Dioxide (SiO2) - variety of Chalcedony

Banded Agate (specifically Carnelian Agate)

Silicon Dioxide (SiO2) - Chalcedony variety

Quartz (specifically Rose or Smoky tinted Quartz)

Silicon Dioxide (SiO2)

Agate (specifically Carnelian or Honey Agate)

Silicon Dioxide (SiO2)

Banded Agate (specifically Sardonyx or Red Agate)

Silicon Dioxide (SiO2)

Chalcedony (specifically Blue Chalcedony or Common Opal variety)

Silicon Dioxide (SiO₂)

Banded Agate (specifically Carnelian Agate)

Cryptocrystalline Quartz (SiO2)

Banded Agate (specifically Black Sardonyx/Onyx variety)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Agate (specifically a Banded Agate with a Quartz Druzy center)

Silicon Dioxide (SiO2)

Agate (specifically Botswana or Banded Agate variety)

Chalcedony (Silicon Dioxide, SiO2)

Chert (Iron-stained)

Silicon Dioxide (SiO2) with Ferruginous impurities

Red Jasper

Jasper (a variety of Chalcedony, SiO₂ with impurities)

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Jasper (specifically Owyhee or Picture Jasper variety)

Jasper (Silicon Dioxide, SiO2)

Dragon Stone

Argillaceous Sedimentary Rock (Ohko Stone)

Gneiss (specifically Pink Gneiss)

Gneiss (high-grade regional metamorphic rock)

Chrysoprase

Chrysoprase (a variety of Chalcedony, SiO₂)

Pink Granite

Phaneritic Felsic Igneous Rock (Granite)

Chert (specifically Dark Chert or Flint)

Silicon dioxide (SiO2)

Peridot (likely, based on color and appearance)

Olivine group mineral, specifically (Mg,Fe)2SiO4 (Forsterite-Fayalite solid solution series)

Ocean Jasper (Orbicular Jasper)

Silicon Dioxide (SiO2)

Opalite

Man-made opalescent glass

Ocean Jasper (Orbicular Jasper)

Silicon Dioxide (SiO2) with iron and magnesium inclusions

Amber

Succinite (specifically for Baltic amber); Chemical formula approximately C10H16O