Igneous Or Metamorphic

Blue Quartzite (Aventurine)

Silicon Dioxide (SiO2) with mineral inclusions

Unakite

Epidotized Granite

Mica Schist

Mica Schist (Complex Silicate Rock)

Quartzite

Quartzite (primarily SiO2)

Schist (Diamond Drill Core)

Mica Schist

Schist

Crystalline Schist (often containing Muscovite, Biotte, or Quartz)

White Marble (Industrial/Architectural)

Recrystallized Calcite (CaCO3)

Marble

Recrystallized Calcite / Dolomite (CaCO3)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Blue Quartzite (Dyed)

Silicon Dioxide (SiO2) with inclusions

Green Quartzite

Quartzite (SiO2)

Quartzite

Quartzite (SiO2)

Quartzite Pebble

Quartzite (primarily SiO2)

Garnet Schist

Garnetiferous Micaceous Schist

Quartzite

Quartzite (SiO2)

Beach Quartzite Pebble

Quartzite (primarily SiO2)

Green Quartzite (River Stone)

Metamorphic Quartz (SiO2) with inclusions (typically Fuchsite or Chlorite)

Green Quartzite

Metamorphic Quartz (SiO2) with Chromium-rich inclusions (Fuchsite)

Slate

Foliated Metamorphic Rock (primarily clay minerals and micas)

River Pebble (Gneiss or Quartzite variant)

Course-grained Metamorphic Rock (likely SiO2 dominant)

Anthracite Coal

Anthracite (Carbon-based sedimentary-derived metamorphic rock)

Lapis Lazuli (Raw)

Lazurite-rich metamorphic rock; Na3Ca(Al3Si3O12)S

Slate with Pyrite Inclusions

Foliated Metamorphic Rock (with Iron Sulfide FE-S2)

Slate with Quartz Vein

Foliated Metamorphic Rock (Mainly Quartz, Muscovite, Chlorite)

Schist

Mica Schist (primarily Muscovite and Quartz)

Marble

Recrystallized Calcite (CaCO3) or Dolomite (CaMg(CO3)2)

Labradorite

Labradorite (a calcium-enriched sodic plagioclase feldspar mineral - (Ca, Na)(Al, Si)4O8)

Sandstone (with potentially metamorphic or basaltic bands)

Arenite / Lithic Wacke

Granite (Orthoclase rich)

Granite (composed primarily of Quartz and Potassium Feldspar KAlSi3O8)

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions (Quartzite)

Ruby in Fuchsite (often sold as Ruby in Zoisite)

Corundum (Al2O3) in Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)

Dragon Blood Jasper (Epidote with Piedmontite or Quartz)

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

Fuchsite Schist

Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2) in Schist

Yellow Quartzite

Quartzite (primarily Silicon Dioxide - SiO2)

Green Aventurine

Aventurine Quartz (SiO2 with inclusions of Fuchsite)

Red Quartzite River Stone

Quartzite (SiO2)

Schist

Mica Schist

Yellow Aventurine (or Citrine-colored Quartz)

Silicon Dioxide (SiO2) with inclusions

Quartzite with Chert inclusions

Metamorphosed Quartz-rich Rock (SiO2)

Schist

Mica Schist (primarily Muscovite or Biotite sheet silicates)

Almandine Garnet

Iron aluminum silicate - Fe3Al2(SiO4)3

Pink Jade (Dyed Quartzite)

Silicon Dioxide (SiO2) - primarily Quartzite or Quartz