Metamorphic Or Sedimentary

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Staurolite (Fairy Cross)

Staurolite (Fe2+2Al9Si4O23(OH))

Epidote in Matrix

Epidote; Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)

Hypersthene

Hypersthene ((Mg,Fe)SiO₃)

Quartzite (with Metamorphic Foliation)

Quartzite (Recrystallized SiO2)

Quartz with Iron Stains

Quartz (SiO2) with iron oxide/hydroxide staining

Sodalite

Sodalite (Na4Al3Si3O12Cl)

Banded Gneiss (Variety of Gneiss)

Gneiss (specifically, a variety exhibiting prominent banding; mineral composition can vary, but often contains quartz, feldspar, mica, and amphibole)

Biotite / Black Mica

K(Mg,Fe)3(AlSi3O10)(F,OH)2

Yellow Jade (Nephrite)

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

Rhodonite

Manganese Silicate (Mn,Fe,Mg,Ca)SiO3

Rhodonite

Manganese Silicate (Mn,Fe,Mg,Ca)SiO3

Blue Sapphire (in a faceted jewelry setting)

Corundum (Al2O3) with trace Iron and Titanium

Muscovite Mica

Muscovite (Potassium Aluminum Silicate) - KAl2(AlSi3O10)(F,OH)2

Ruby in Zoisite with Hornblende

Anyolite (Ruby: Al2O3, Zoisite: Ca2Al3(SiO4)3(OH))

Unakite

Epidotized Granite (composition: K-feldspar, Epidote, and Quartz)

Rhodonite

Rhodonite (Manganese Iron Magnesium Calcium Silicate) - (Mn+2,Fe+2,Mg,Ca)SiO3

Green Quartz / Aventurine

Silicon Dioxide (SiO2) with inclusions

Nephrite Jade

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

Epidote (Unakite-related)

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

Epidote

Epidote Group (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))

Epidosite

Epidosite (predominantly Epidote {Ca2Al2Fe3+Si3O12(OH)} and Quartz {SiO2})

Almandine Garnet

Almandine, Fe3Al2(SiO4)3

Epidote

Epidote - {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)

River Rock (likely Quartzite or Chert)

Quartzite (primarily SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Orange Quartz (Citrine Quartz)

Silicon Dioxide (SiO2)

Granitic Pegmatite

Granitic Pegmatite (principally Quartz, Potassium Feldspar, and Mica)

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Quartzite

Quartzite (primarily SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Schist

Mica Schist

Milky Quartz (with Chlorite/Mineral Inclusions)

Silicon Dioxide (SiO2)

Almandine Garnet

Almandine, Fe3Al2(SiO4)3

Quartz

Silicon dioxide (SiO2)

Epidote in Quartz (Unakite-like specimen)

Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH)) in Quartz (SiO2)

Yellow Aventurine

Silicon Dioxide (SiO2) with inclusions

Quartz (Milky and Smoky variety)

Silicon Dioxide (SiO2)

Soapstone (Talc-Schist)

Steatite (composed primarily of Talc: Mg3Si4O10(OH)2)

Quartzite

Quartzite (SiO2)

Quartzite

Quartzite (SiO2)

Quartzite

Quartzite (SiO2)