Metamorphic Or Igneous (Context Dependent)

Anthracite Coal

Anthracite (Carbon C)

Rough Garnet in Matrix

Almandine Garnet (Fe3Al2Si3O12)

Porous Quartzite

Metamorphosed Quartz-rich Sandstone (SiO2)

Quartzite

Quartzite (SiO2)

Green Aventurine

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

Marble

Recrystallized Calcite (CaCO3)

Bornite (Peacock Ore)

Bornite (Cu5FeS4)

Tiger Iron / Banded Iron Formation

Banded Iron Formation (SiO2 with Fe2O3 and FeOOH)

Bronzite

Enstatite (var. Bronzite), (Mg,Fe)SiO3

Epidote with Feldspar/Quartz (Unakite-like)

Epidotized Granite (Ca2(Al,Fe)3(SiO4)3(OH) + KAlSi3O8)

Quartzite River Rock

Quartzite (primarily SiO2)

Quartzite

Quartzite (primarily SiO2)

Lapis Lazuli

Lapis lazuli (a rock primarily composed of Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Marble

Recrystallized Calcite (CaCO3)

Quartzite

Quartzite (composed primarily of Silica, SiO2)

Charoite

K(Ca,Na)2Si4O10(OH,F)·H2O

Lapis Lazuli

Lapis Lazuli (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2

Lapis Lazuli

Lazurite-dominant Metamorphic Rock (complex aluminosilicate)

Coarse-Grained Marble

Recrystallized Limestone (Major component: CaCO3)

Lapis Lazuli

Sodalite-rich metamorphic rock containing Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2

Quartzite

Quartzite (SiO2)

Anthracite

Anthracite (Carbon-rich metamorphic coal)

Lapis Lazuli (polished cabochon)

Lazurite-rich metamorphic rock (approx. Na6Ca2Al6Si6O24(SO4,S,Cl)2)

Lapis Lazuli

Lapis Lazuli (aggregate of Lazurite, Calcite, and Pyrite)

Quartzite with Hematite staining

Quartzite (SiO2)

Lapis Lazuli

Lapis lazuli (complex rock composed of Lazurite, Calcite, and Pyrite)

Lapis Lazuli

Complex metamorphic rock containing Lazurite ((Na,Ca)8(AlSiO4)6(SO4,S,Cl)2), Calcite, and Pyrite

Quartzite

Quartzite (SiO2)

Yellow Quartzite

Quartzite (SiO2)

Lapis Lazuli

Lapis Lazuli (Primary mineral: Lazurite (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2)

Epidote (likely Pistacite in Epidosite rock)

Epidote: Ca2(Al,Fe)3(SiO4)3(OH)

Charoite

Charoite; (K,Sr,Ba,Ca)15-16(Na,Ca)8(Si,Al)24O60(OH,F)4·nH2O

Marble (White)

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

Metaconglomerate

Metaconglomerate (Quartzite conglomerate)

Quartzite

Quartzite (SiO2)

Lapis Lazuli

Na8[Al6Si6O24]n(S,Cl,SO4,OH)2

Nephrite Jade

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

Blue Calcite

Calcium Carbonate (CaCO3)

Slate

Phyllo-silicate based metamorphic rock

Anthracite Coal

Anthracite (Carbon-based metamorphic rock)

Quartzite

Quartzite (SiO2-rich metamorphic rock)

Banded Gneiss

Gneiss (High-grade Metamorphic Rock)