Metamorphic Rock (For Both Nephrite And Jadeite)

Quartzite

Quartzite (primarily SiO2)

Petrified Wood

Silicified Wood (SiO2)

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals, (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4)

Wishing Stone (Quartz-Veined Pebble)

Hydrothermal Quartz in Metasedimentary Matrix (SiO2/Matrix)

Orange Quartzite (River Pebble)

Quartzite (SiO2 with Iron Oxide inclusions)

Quartzite (Yellow/Tan Quartz Cobble)

Metamorphosed Quartz Sandstone (SiO2)

Quartz

Quartz (SiO2 - Silicon Dioxide)

Banded Gneiss

Gneiss (High-grade metamorphic rock typically composed of Quartz, Feldspar, and Mica)

Marble

Metamorphosed Limestone/Dolomite

Garnet (Red Garnet)

Garnet Group. The red varieties seen in jewelry are typically Almandine (Fe3Al2(SiO4)3), Pyrope (Mg3Al2(SiO4)3), or a mix of the two (pyrope-almandine series).

Quartz / Calcite Vein Rock

Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3)

Epidosite (Epidote-rich rock)

Epidosite (consisting primarily of Epidote: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH))

Tiger's Eye

Tiger's Eye (a variety of Chalcedony, which is a microcrystalline quartz with fibrous inclusions of oxidized crocidolite)

Calcite

Calcite (CaCO₃, Calcium Carbonate)

Pink Sapphire

Corundum (Al2O3 with trace Chromium and Iron)

Quartzite River Rock

Quartzite (primarily SiO2)

Quartzite River Rock

Quartzite (primarily SiO2)

Quartzite River Rock

Quartzite (primarily SiO2)

Quartzite River Rock

Quartzite (primarily SiO2)

Quartzite River Rock

Quartzite (primarily SiO2)

Quartzite River Rock

Quartzite (SiO2)

Quartzite River Rock

Quartzite (primarily SiO2)

Quartzite

Quartzite (primarily SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Dendritic Agate

Chalcedony (SiO2) with manganese/iron oxide inclusions

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with iron inclusions)

Quartzite Pebble

Quartzite (SiO2)

Iron-Stained Quartzite

Recrystallized Meta-Quartzite (primarily SiO2)

Pink Quartzite

Quartzite (primarily SiO2 with trace impurities of iron oxides)

Quartzite Beach Pebble

Quartzite (primarily SiO2)

Quartzite (or Milky Quartz pebble)

Quartzite (primarily Silicon Dioxide, SiO2)

Quartzite (River Pebble)

Quartzite (composed primarily of Silica, SiO2)

Gneiss (specifically a Granitic Gneiss)

Gneiss (Composition: Quartz, Feldspar, Mica)

Quartz (likely milky/rose quartz variety)

Quartz (SiO2 - Silicon Dioxide)

Schist

Mica Schist (Quartz-Muscovite-Biotite Schist)

Mica Schist

Mica Schist (Predominantly Muscovite/Biotite)

Quartzite

Quartzite (Primary mineral: Silicon Dioxide, SiO2)

Epidosite

Epidosite (Metasomatic rock consisting mainly of Epidote and Quartz)

Mica Schist

Crystalline Schist (often primarily Muscovite or Biotite sheet silicates)

Lapis Lazuli (Lazurite crystals on Marble)

Lazurite / (Na,Ca)8[(S,Cl,SO4,OH)2|(AlSiO4)6]

Quartzite River Rock (with Limonite staining)

Quartzite (SiO2)

Amethyst

Amethyst (Silicon Dioxide, SiO2)