Metamorphic Rock (Formed From A Fibrous Crocidolite Asbestos)

River Quartz Pitting / Quartzite Pebble

Quartzite (primarily SiO2)

Almandine Garnet

Iron aluminum silicate (Fe3Al2(SiO4)3)

Quartzite Pebble (River Rock)

Quartzite (primarily SiO2)

Rose Quartz

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Gneiss (with Quartzite and Biotite)

Gneiss containing SiO2 (Quartz), K(Mg,Fe)3AlSi3O10(OH)2 (Biotite), and (K,Na,Ca)AlSi3O8 (Feldspar)

Quartzite

Quartzite (SiO2)

Biotite (Black Mica)

Biotite - K(Mg,Fe)3(AlSi3O10)(OH)2

Dragon Blood Jasper (Epidote with Piedmontite or Quartz)

Epidote-rich Quartzite / SiO2 with (Ca2(Al2,Fe)(Si2O7)(SiO4)O(OH))

Granite Gneiss

Gneiss (High-grade regional metamorphic rock)

Quartzite

Quartzite (SiO2)

Quartzite

Quartzite (primarily SiO2)

Schist with Schorl (Black Tourmaline)

NaFe3Al6(BO3)3Si6O18(OH)4 (Schorl)

Quartzite

Metamorphosed Quartz Sandstone (SiO2)

Quartzite

Quartzite (primarily SiO2)

Aventurine

Quartzite with inclusions (SiO2 containing Fuchsite chrome mica)

Quartzite

Quartzite (SiO2)

Ruby in Fuchsite (often confused with Ruby in Zoisite)

Corundum (Al2O3) in Chromium-rich Muscovite (KAl2(AlSi3O10)(OH)2)

Quartzite with Iron Mineral Banding

Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3) staining

Quartzite

Quartzite (primarily SiO2)

Black Tourmaline

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

Biotite Mica in Host Rock

Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)

Dendritic Agate

Chalcedony (SiO2) with manganese/iron oxide inclusions

Quartzite (Beach Pebble)

Quartzite (composed primarily of SiO2)

Quartz Mica Schist

Mica-Quartz Schist (Chemical: SiO2 + KAl2(AlSi3O10)(OH)2)

Chrome Diopside

Magnesium Calcium Silicate (MgCaSi2O6) containing Chromium impurities

Milky Quartz

Silicon Dioxide (SiO2)

Unakite

Unakite (altered granitic rock)

River Cobble (likely Quartzite or Limestone)

SiO2 (Quartzite dominant) or CaCO3 (Limestone dominant)

Banded Gneiss

Gneiss

Petrified Wood

Silicified Wood (SiO2)

Unakite

Epidotized Granite

Milky Quartz

Crystalline Silicon Dioxide (SiO2)

Muscovite Mica (Golden/Yellow variety)

KAl2(AlSi3O10)(F,OH)2

Quartz (Milky/Bull Quartz)

Silicon Dioxide (SiO2)

Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)

Amethyst

Amethyst (Silicon Dioxide, SiO2)

Chert (Nodule)

Chert (SiO2)

Mica Schist

Mica Schist (primarily Muscovite and Quartz composition)

Quartzite

Quartzite (SiO2-dominant rock)

Schist

Mica Schist (Medium-grade metamorphic rock)

Greenstone

Greenschist / Greenstone (containing Chlorite, Epidote, Actinolite)