Metamorphic Rock (Variety Of Quartz)

Gneiss (specifically a Granitic Gneiss)

Gneiss (typically composed of Quartz, Feldspar, and Mica/Amphiboles)

Yellow Jasper

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

Unakite

Unakite (Metasomatized Granite)

Gneiss (specifically a Banded Gneiss pebble)

Gneiss (High-grade Regional Metamorphic Rock)

Yellow Quartzite (River Pebble)

Quartzite (primarily SiO2)

Gneiss (Granitic Gneiss)

Gneiss (from German Gneis, related to 'spark')

Dragon Blood Jasper

Epidote with Red Jasper inclusions (SiO2 and Ca2(Al,Fe)3(SiO4)3(OH))

Amethyst

SiO2 (Silicon Dioxide) - Purple variety of Crystalline Quartz

Banded Chert or Agate

Silicon Dioxide (SiO2)

Serpentinite

Serpentinite (Mg, Fe, Ni)3Si2O5(OH)4

Black Tourmaline

Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)

Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)

Goldstone (with Tiger's Eye and Quartz)

Aventurine glass (Synthetic SiO2 with Cu inclusions)

Diabase (Trap Rock)

Diabase (also known as Dolerite)

Quartz (Common or Milky Quartz)

Silicon Dioxide (SiO2)

Diorite

Diorite (Intermediate intrusive igneous rock)

Agate

Silicon Dioxide (SiO2)

Jade (likely Jadeite)

Jadeite (a pyroxene mineral) or Nephrite (a variety of amphibole mineral)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Red Jasper

Silicon Dioxide with Iron Oxide inclusions (SiO2 + Fe2O3)

Conglomerate

Conglomerative Sedimentary Rock

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Petrified Wood

Silicified Wood (primarily SiO2 - Silicon Dioxide / Chalcedony)

Smoky Quartz (with possible Feldspar inclusions)

Silicon Dioxide (SiO2)

Green Aventurine

Aventurine (a variety of Quartz, SiO2 with fuchsite inclusions)

Quartzite River Rock (with Limonite staining)

Quartzite (SiO2)

Sandstone (Red/Brown Variety)

Arenite (composed primarily of SiO2 with Fe2O3 iron oxide inclusions)

Blue Lace Agate (Banded Chalcedony)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Quartzite

Quartzite (Primary mineral: SiO2)

Quartzite (tumbled or water-worn)

Quartzite (composition: SiO2)

Sandstone (with possibly iron oxides and other minerals)

Sandstone

Granitic Gneiss

Gneiss (containing Potassium Feldspar and Quartz)

Smoky Quartz

Smoky Quartz (SiO ₂)

Amethyst Lace Agate / Banded Amethyst

Silicon Dioxide (SiO2) with Fe3+ impurities

Chert (Pink Jasper/Agate variety)

Microcrystalline Quartz (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz Pebble (Citrine-colored or Stained Quartz)

Silicon Dioxide (SiO2)

Jasper (Iron-rich Microcrystalline Quartz)

Silicon Dioxide (SiO2) with Hematite inclusions

Chert (Iron-stained)

Chert (SiO2)