Metamorphic

Schist (Chlorite or Mica-rich)

Chlorite Schist

Magnetite

Magnetite (Fe3O4)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Schist with Quartz Vein

Mica Schist with Crystalline Quartz (SiO2)

Nephrite Jade

Ca2(Mg,Fe)5Si8O22(OH)2 (Calcium magnesium iron silicate hydroxide)

Almandine Garnet in Matrix

Almandine, Fe3Al2(SiO4)3

Quartz / Quartzite

Silicon Dioxide (SiO2)

Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2) or Jadeite (NaAlSi2O6)

Ferruginous Quartzite (Red Chert/Jasper-like)

Metamorphosed Quartzite with Hematite inclusions (SiO2 + Fe2O3)

Rhodonite with Manganese Oxides

Rhodonite (Mn,Fe,Mg,Ca)SiO3

Black Kyanite

Kyanite (Al2SiO5) with carbonaceous inclusions

Quartzite

Quartzite (primarily SiO2)

Marble

Recrystallized Calcite (CaCO3)

Marble

Recrystallized Calcite (CaCO3) Rock

Iolite-bearing Gneiss (Cordierite)

Cordierite (Mg2Al4Si5O18) in Gneiss matrix

Almandine Garnet

Iron aluminum silicate (Fe3Al2(SiO4)3)

Garnet

Almandine formula: Fe3Al2(SiO4)3

Green Aventurine

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

Kyanite (in Schist Matrix)

Kyanite (Al2SiO5)

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite mica

Fuchsite

Chromium-bearing Muscovite - K(Al,Cr)2(AlSi3O10)(OH)2

Quartzite (River Cobble)

Quartzite (predominantly SiO2)

Greenstone (Epidote/Chlorite Schist)

Metabasalt (composed primarily of Epidote Ca2Al2(Fe3+;Al)(SiO4)(Si2O7)O(OH) and Chlorite (Mg,Fe)3(Si,Al)4O10(OH)2·(Mg,Fe)3(OH)6)

Quartzite River Rock

Quartzite (primarily SiO2)

Blue Sapphire

Corundum (Al2O3 with trace Titanium and Iron)

White Marble

Recrystallized Calcite / Calcium Carbonate (CaCO3)

Schist

Mica Schist

Greywacke (Briarcliff Schist/Gneiss)

Manhattan Schist / Fordham Gneiss complex

Staurolite (Cross Stone)

Staurolite (Fe2+2Al9Si4O23(OH))

Lapis Lazuli

Lazurite-rich metamorphic rock (approx. Na6Ca2(Al6Si6O24)(S,SO4,Cl)1,2)

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)

Dragon Blood Jasper (Lizard Stone/Septarian Chalcedony)

Epidote with Black Hornblende and White Quartz mixture

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)

Orange Quartzite / Carnelian Agate

Silicon Dioxide (SiO2)

Quartzite

Quartzite (mostly SiO2)

Quartzite

Quartzite (primarily SiO2)

Mica Schist

Mica Schist (KAl2(AlSi3O10)(OH)2 - Muscovite component)