Metamorphic, Likely Sedimentary With Quartz Veins

White Jade / White Chalcedony

Nephrite Jade (Ca2(Mg,Fe)5Si8O22(OH)2) or Chalcedony (SiO2)

Milk Quartz (Vein Quartz)

Quartz (Silicon Dioxide, SiO2)

Yellow Quartz Pebble

Silicon Dioxide (SiO2)

Red Jasper with Quartz Veining

Jasper (Silicon Dioxide, SiO2) with Quartz (SiO2) inclusions

Chert (often called Flint or Agate nodule)

Cryptocrystalline Quartz (SiO2)

Quartz Geode / Druzy Quartz

Silicon Dioxide (SiO2)

Quartz

Quartz (SiO₂)

Riverstone Quartzite (Water-worn Siltstone/Quartzite)

Metamorphosed Quartz-rich Arenite (SiO2)

Fluorite and Rose Quartz

Fluorite (CaF2), Rose Quartz (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartzite (River Cobble)

Quartzite (Metamorphosed Quartz Sandstone, SiO2)

Quartz (Milky/Smoky variety on matrix)

Silicon Dioxide (SiO2)

Cinnabar

Mercury(II) sulfide (HgS)

Quartz Vein in Metamorphic Rock

Silicon Dioxide (SiO2) within Metasedimentary host

Banded Gneiss (with possible weathered sulfide or iron staining)

Gneiss, potentially with iron oxide/hydroxide staining (e.g., limonite) or weathered sulfides

Milky Quartz

Silicon Dioxide (SiO2)

Chert / Flint (River Pebble)

Cryptocrystalline Quartz (SiO2)

Ferruginous Quartz (Iron-stained Quartz)

Silicon Dioxide (SiO2) with iron oxide inclusions (Limonite/Hematite)

Chert (Common Opal/Jasper variety)

Cryptocrystalline Quartz (SiO2)

Quartz (Milky/Common variant)

Silicon Dioxide (SiO2)

Sandstone (Quartzose)

Arenite (primarily SiO2)

Quartz (Milky Quartz/Citrine Type)

Silicon Dioxide (SiO2)

Quartz (Milky/Common)

Silicon Dioxide (SiO2)

Sandstone (Greywacke/Lithic Sandstone)

Arenite (composed primarily of SiO2)

Magnetite (likely in Hematite or Ironstone)

Magnetite (Fe3O4)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz (Milky/Clear variety)

Silicon Dioxide (SiO2)

Red Quartzite (likely Purple/Red variety)

Quartzite (SiO2)

Milky Quartz Vein with Iron Staining

Silicon Dioxide (SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Agatized Fossil or Chalcedony Nodule

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Chert (Field Stone/Pebble)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Raw Emerald

Beryl (Be3Al2(SiO3)6) with Cr/V impurities

Quartzite

Quartzite (primarily SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Chert (v. Flint)

Sedimentary Cryptocrystalline Quartz (SiO2)

Basalt

Mafic Igneous Rock (composed primarily of plagioclase, pyroxene, and olivine)

Quartz (Milky/Crystalline)

Silicon Dioxide (SiO2)

Quartz (possibly milky quartz)

Quartz (Silica; SiO₂)