Metamorphic And Sedimentary

Tourmaline (Multi-colored)

Complex Borosilicate (Na,Ca)(Li,Mg,Al,Fe)3Al6(BO3)3Si6O18(OH)4

Moonstone (Feldspar)

Orthoclase (KAlSi3O8) or Albite (NaAlSi3O8)

Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite

Black Sand (Magnetite Sand)

Magnetite (Fe3O4)

Schorl (Black Tourmaline) in Matrix

Sodium Iron Aluminum Borosilicate Hydroxide (NaFe2+3Al6Si6O18(BO3)3(OH)3OH)

Jadeite (Jade)

Jadeite (NaAlSi2O6)

Tiger's Eye

Silicon Dioxide (SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Beryl (var. Heliodor or Aquamarine)

Beryllium Aluminum Cyclosilicate (Be3Al2Si6O18)

Smoky Quartz

Silicon Dioxide (SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Yellow Quartz / Citrine Quartz

Silicon Dioxide (SiO2)

Aquamarine

Beryl (Be3Al2Si6O18 with iron impurities)

Smoky Quartz

Silicon Dioxide (SiO2)

Chalcopyrite in Matrix

Chalcopyrite (CuFeS2)

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(OH)2)

Schist

Mica Schist

Schist

Mica Schist

Mica Schist

Mica Schist (primarily Muscovite [KAl2(AlSi3O10)(OH)2] or Biotite)

Marble

Recrystallized Calcite (CaCO3)

Sandstone (Quartzite-rich)

Clastic sedimentary rock (SiO2 primary)

Schist

Mica Schist (primarily composed of quartz, feldspar, and mica)

Mica Schist

Muscovite/Biotite Schist

Pyritic Quartzite

Metequartzite with FeS2 (Pyrite) inclusions

Schist with Quartz Vein

Mica Schist with Crystalline Quartz (SiO2)

Nephrite Jade

Ca2(Mg,Fe)5Si8O22(OH)2 (Calcium magnesium iron silicate hydroxide)

Almandine Garnet in Matrix

Almandine, Fe3Al2(SiO4)3

Quartz / Quartzite

Silicon Dioxide (SiO2)

Ferruginous Quartzite (Red Chert/Jasper-like)

Metamorphosed Quartzite with Hematite inclusions (SiO2 + Fe2O3)

Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2) or Jadeite (NaAlSi2O6)

Quartzite

Quartzite (primarily SiO2)

Quartzite (River Cobble)

Quartzite (predominantly SiO2)

Quartzite River Rock

Quartzite (primarily SiO2)

Greenstone (Epidote/Chlorite Schist)

Metabasalt (composed primarily of Epidote Ca2Al2(Fe3+;Al)(SiO4)(Si2O7)O(OH) and Chlorite (Mg,Fe)3(Si,Al)4O10(OH)2·(Mg,Fe)3(OH)6)

Clear Quartz (beads in a bracelet)

Quartz (SiO2)

Iolite-bearing Gneiss (Cordierite)

Cordierite (Mg2Al4Si5O18) in Gneiss matrix

Garnet

Almandine formula: Fe3Al2(SiO4)3

Almandine Garnet

Iron aluminum silicate (Fe3Al2(SiO4)3)

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite mica

Fuchsite

Chromium-bearing Muscovite - K(Al,Cr)2(AlSi3O10)(OH)2

Marble

Recrystallized Calcite (CaCO3)