Mineral (Specifically A Variety Of Quartz)

Agate (Carnelian-like)

Chalcedony (Silicon Dioxide, SiO2)

N/A - Image does not contain a rock or mineral

Anthropogenic textile material

Petrified Wood

Silicified Wood (SiO2)

Hawk's Eye (Blue Tiger's Eye)

Quartz (fibrous crocidolite variety)

Quartz (Milky/Clear Variety)

Silicon Dioxide (SiO2)

Green Aventurine

Silicon Dioxide (SiO2) with Fuscite inclusions

Carnelian

Chalcedony (SiO2)

Chert (specifically Jasper/Carnelian Agate)

Microcrystalline Quartz (SiO2)

Chert (specifically Flint)

Microcrystalline quartz (SiO2)

Pyrite and Sunstone

Iron Sulfide (FeS2) and Plagioclase Feldspar ((Ca,Na)Al(Al,Si)Si2O8)

Blue Quartz (Aventurine)

Silicon Dioxide (SiO2) with fibrous inclusions (commonly Dumortierite)

Chalcedony (specifically Agate or Common Opal variety)

Cryptocrystalline Silica (SiO2)

Milky Quartz (Water-worn Pebble)

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz (Beach Pebble)

Quartz (Silicon Dioxide, SiO2)

Green Aventurine and Clear Quartz

Aventurine (variety of Quartz - SiO2) and Quartz (SiO2)

Quartz (likely) / Siliceous rock with quartz phenocrysts (if a rock fragment)

Quartz (SiO₂)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Milky and Bull Quartz)

Silicon Dioxide (SiO2)

Quartz (specifically Milky/Gray Quartz)

Silicon Dioxide (SiO2)

Biggs Jasper

Cryptocrystalline Quartz (Silicon Dioxide) - SiO2

Quartz (Smoky or Impure Variety)

Silicon Dioxide (SiO2)

Quartz (likely)

Quartz (SiO2 - Silicon Dioxide)

Quartz (Milky Quartz / Quartzite)

Silicon Dioxide (SiO2)

Amethyst

Amethyst (variety of Quartz, SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Ferruginous Quartz (Iron-stained Quartz)

Silicon Dioxide with Iron Oxide (SiO2 with traces of Fe2O3/FeO(OH))

Rose Quartz and Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Raw Chunk)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Citrine

Quartz (SiO₂)

Yellow Quartz (Citrine type/Tumbled Quartz)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Rose or Clear variety)

Silicon Dioxide (SiO2)

Chert (Flint)

Microcrystalline Quartz (SiO2)

Chert (Black Chert/Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Smoky Quartz

Smoky Quartz (Silicon Dioxide - SiO2)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)