Metamorphic And Sedimentary

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Epidote in Matrix

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

Staurolite (Fairy Cross)

Staurolite (Fe2+2Al9Si4O23(OH))

Hypersthene

Hypersthene ((Mg,Fe)SiO₃)

Quartz with Iron Stains

Quartz (SiO2) with iron oxide/hydroxide staining

Quartzite (with Metamorphic Foliation)

Quartzite (Recrystallized SiO2)

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)

Rhodonite

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

Rhodonite

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

Biotite / Black Mica

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

Yellow Jade (Nephrite)

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

Unakite

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

Rhodonite

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

Blue Sapphire (in a faceted jewelry setting)

Corundum (Al2O3) with trace Iron and Titanium

Ruby in Zoisite with Hornblende

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

Muscovite Mica

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

Green Quartz / Aventurine

Silicon Dioxide (SiO2) with inclusions

Nephrite Jade

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

Epidosite

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

Epidote (Unakite-related)

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

Epidote

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

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)

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Orange Quartz (Citrine Quartz)

Silicon Dioxide (SiO2)

Granitic Pegmatite

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

Milky Quartz

Silicon Dioxide (SiO2)

Quartzite

Quartzite (primarily SiO2)

Milky Quartz (with Chlorite/Mineral Inclusions)

Silicon Dioxide (SiO2)

Schist

Mica Schist

Almandine Garnet

Almandine, Fe3Al2(SiO4)3

Quartz

Silicon dioxide (SiO2)

Yellow Aventurine

Silicon Dioxide (SiO2) with inclusions

Epidote in Quartz (Unakite-like specimen)

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

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)