Metamorphic Or Sedimentary

White Marble

Recrystallized Calcite (CaCO3)

Green Aventurine (Quartzite)

Silicon Dioxide (SiO2) with inclusions of Fuchsite (Mica)

Schist

Schist (various mineral compositions)

Epidote in Granite Gneiss

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

Quartzite

Quartzite (SiO2)

Iolite (Cordierite)

Magnesium Iron Aluminum Silicate (Mg,Fe)2Al4Si5O18

Red Garnet

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

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).

Garnet

Almandine (Fe3Al2(SiO4)3)

Chiastolite (Andalusite)

Al2SiO5

Jasper containing epidote (Unakite-like)

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

Quartzite

Quartzite (SiO2)

Sandstone

Sandstone ( преимущественно SiO2 )

Shale

Laminated Mudstone (Shale)

Sandstone

Arenite

Greenstone (River Pebble)

Metabasalt / Greenschist

Schist

Mica Schist

Nephrite Jade

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

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

Magnetic Hematite

Magnetized Hematite (an iron oxide mineral, Fe2O3, that has undergone magnetization)

Brachiopod Fossil in Sedimentary Matrix

Phylum Brachiopoda in Siltstone/Mudstone matrix

Seashell (Calcium Carbonate)

Calcium Carbonate (CaCO3)

Green Aventurine (Green Quartzite)

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

Almandine Garnet & Tumbled Citrine Quartz

Fe3Al2(SiO4)3 (Garnet) and SiO2 (Quartz)

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)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Milk Quartz (Vein Quartz)

Quartz (Silicon Dioxide, SiO2)

Quartzite

Quartzite (primarily SiO2)