Metamorphic

Schist

Schist (various mineral compositions)

Lapis Lazuli (polished cabochon)

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

Slate

Slate (foliated metamorphic rock, primarily composed of quartz, illite, chlorite, and micas)

Serpentine Schist with Quartz Vein

Serpentine Schist (a type of Metamorphic rock). The white band is likely Quartz (SiO2).

Iolite (Cordierite)

Magnesium Iron Aluminum Silicate (Mg,Fe)2Al4Si5O18

Red Garnet

Almandine (Fe3Al2(SiO4)3) or Pyrope (Mg3Al2(SiO4)3)

Quartzite

Quartzite (primarily SiO₂)

Greenstone (River Pebble)

Metabasalt / Greenschist

Schist

Mica Schist

Fuchsite Quartzite

Fuchsite-bearing Quartzite

Epidote in Granite Gneiss

Epidote bearing Orthogneiss (Ca2(Al,Fe)3(SiO4)3(OH))

Garnet-bearing Schist

Almandine Garnet (Fe3Al2(SiO4)3) in Mica Schist

Quartzite

Quartzite (SiO2)

Chiastolite (Andalusite)

Al2SiO5

Graphite

Graphite (Native Carbon, C)

Jasper containing epidote (Unakite-like)

Epidotized Jasper (SiO2 with Ca2(Al,Fe)3(SiO4)3(OH))

Quartzite

Quartzite (SiO2)

Garnet

Almandine (Fe3Al2(SiO4)3)

Nephrite Jade

Ca2(Mg, Fe)5Si8O22(OH)2 (Tremolite-Actinolite series)

Marble

Recrystallized Carbonate Rock (CaCO3)

Quartzite

Quartzite (primarily SiO2)

Epidote in Quartz

Epidote (Ca2(Al,Fe)3(SiO4)3(OH)) in Milky Quartz (SiO2)

Aventurine

Aventurine Quartz (SiO2 with inclusions)

Lapis Lazuli

Na8[Al6Si6O24]S2 (Lazurite component), a rock composed primarily of Lazurite, Calcite, and Pyrite

Zebra Jasper (usually a trade name for Serpentine or Basalt blend)

Antigorite/Chrysotile (Serpentine family) - Mg3Si2O5(OH)4

Lapis Lazuli

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

Quartzite

Quartzite (primarily SiO2)

Green Aventurine (Green Quartzite)

Silicon Dioxide (SiO2) with inclusions of Fuchsite (chromium-rich mica)

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Yellow Aventurine

Quartz variety (SiO2) with inclusions

Gold Ore in Quartz

Native Gold (Au) in Quartz (SiO2) matrix

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Epidote with Quartz/Feldspar

Epidote (Ca2(Al, Fe)3(SiO4)3(OH)) with associated minerals in a host rock

Milky Quartz (Common Quartz)

Quartz (Silicon Dioxide, SiO2)

Rough Tanzanite

Zoisite (Ca2Al3(SiO4)3(OH))

Quartz (Smoky Quartz variant)

Silicon Dioxide (SiO2)

Pyrite

Iron Sulfide (FeS2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Milk Quartz (Vein Quartz)

Quartz (Silicon Dioxide, SiO2)

Slate

Foliated Metamorphic Rock (composed mainly of Quartz, Illite, and Chlorite)

Anthracite Coal

Anthracite (Carbon-based metamorphic rock, 86-97% C)

Granite Gneiss

High-grade regional metamorphic rock (Quartz-Feldspar Gneiss)