Metamorphic Or Igneous

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

Quartzite with Fuchsite (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)

Quartzite

Quartzite (SiO2)

Rough Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

Yellow Quartzite (or Quartz River Pebble)

Silicon Dioxide (SiO2)

Yellow Quartzite (Orange Quartzite)

Silicon Dioxide (SiO2) with iron oxide staining

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Green Kyanite

Kyanite (Al2SiO5)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Anthracite Coal

Anthracite (Carbon-based organic sedimentary/metamorphic rock)

Shungite

Non-crystalline carbon (high-carbon metamorphic rock)

Coal (Anthracite)

Anthracite (Carbon-based organic sedimentary/metamorphic rock)

Quartzite with Iron Inclusions

Metamorphic Silicon Dioxide (SiO2) with impure Limonite/Hematite

Mica Schist

Medium-grade regional metamorphic rock (composition varies)

Schist

Mica Schist (Group of medium-grade metamorphic rocks)

Slate

Metamorphosed Shale (Fine-grained Foliated Metamorphic Rock)

Schist (Biotite/Mica Schist)

Medium-grade regional metamorphic rock (rich in Phyllosilicates)

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)

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)

André Landed Here Rock (Glacial Erratic)

Granodiorite / Diorite (compositional estimate)

Schist

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

White Marble (Industrial/Architectural)

Recrystallized Calcite (CaCO3)