Igneous And Metamorphic

Quartzite

Quartzite (primarily SiO2)

Sandstone (with potentially metamorphic or basaltic bands)

Arenite / Lithic Wacke

Slate River Stone

Foliated Metamorphic Rock (composed of illite, chlorite, and quartz)

River Pebble (Gneiss or Quartzite)

Metamorphic rock specimen (likely Gneiss or impure Quartzite)

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)

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)

Quartzite Cobble

Quartzite (SiO2)

Quartzite

Quartzite (primarily SiO2)

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)

Black Kyanite

Kyanite (Al2SiO5) with carbonaceous inclusions

Marble

Recrystallized Calcite (CaCO3)

White Marble

Recrystallized Calcite (CaCO3)

Mica Schist

Mica Schist (predominantly Muscovite or Biotite sheet silicates)

Marble

Metamorphosed Limestone (calcite formulation CaCO3)

Mica Schist

Mica Schist (Composition typically contains Muscovite: KAl2(AlSi3O10)(OH)2 or Biotite: K(Mg,Fe)3AlSi3O10(OH)2 along with Quartz and Feldspar)

Greywacke (Briarcliff Schist/Gneiss)

Manhattan Schist / Fordham Gneiss complex

Staurolite (Cross Stone)

Staurolite (Fe2+2Al9Si4O23(OH))

Green Aventurine

Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)3Si3O10(OH)2)

Porcelain (White Ceramic)

Mullite-bearing Vitrified Ceramic (Major phases: Mullite Al6Si2O13, Glassy Silica SiO2)

White Jade (Mutton Fat Jade / Nephrite)

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

Quartzite with Milky Quartz Vein

Metamorphosed Quartz Sandstone (SiO2)

Mica Schist

Schist (Biotite/Muscovite dominant)

Quartzite Pebble

Metamorphosed Sandstone (mainly SiO2)

Pink Quartzite

Quartzite (SiO2 with iron oxide impurities)

Quartzite

Quartzite (primarily SiO2)

Green Aventurine

Silicon Dioxide (Quartz with Fuchsite inclusions), SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2

Quartzite

Quartzite (SiO2)