Mineral In Metamorphic Rock

Fossiliferous Chert with Brachiopod Impression

Chert (SiO2) containing Brachiopoda fossil remains

Smoky Quartz

Silicon Dioxide (SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Smoky Quartz

Smoky Quartz (SiO2)

Biotite / Black Mica

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

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Star Sapphire

Corundum (Al2O3) with Rutile inclusions

Peach Moonstone

Orthoclase Feldspar (KAlSi3O8)

Labradorite

(Ca, Na)(Al, Si)4O8 (Plagioclase Feldspar)

Red Garnet

Pyrope-Almandine series (Mg3Al2(SiO4)3 to Fe3Al2(SiO4)3)

Granite

Granite (Felsic Plutonic Rock)

Granite featuring Quartz Vein

Granite with hydrothermal silica (SiO2) intrusion

Prehnite on Basalt

Prehnite - Ca2Al(AlSi3O10)(OH)2

Quartz Geode Fragment

Silicon Dioxide (SiO2)

Sandstone (likely Arkosic)

Arenite (SiO2 with KAlSi3O8)

Quartz Pebble

Silicon Dioxide (SiO2)

Sandstone

Arenite (composed primarily of SiO2)

Sandstone

Arenite (often composed of Quartz, SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Vesicular Basalt with Lichen

Vesicular Basalt

Yellow Aventurine (specifically a carved crescent moon)

Silicon Dioxide (SiO2) with inclusions

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Yellow Aventurine (Quartz Quartzite)

Silicon Dioxide with Mica inclusions (SiO2 + KAl2(AlSi3O10)(OH)2)

Charoite

Charoite, K(Ca,Na)2Si4O10(OH,F)·H2O

Mica Schist

Mica Schist (KAl2(AlSi3O10)(OH)2 in Matrix)

Lapis Lazuli

Lapis Lazuli (Rock containing Lazurite (Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2, Pyrite, and Calcite)

Granite

Granite (Felsic Plutonic Rock)

Clear Quartz

Silicon Dioxide (SiO2)

Clear Quartz (Druzy)

Crystalline Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Amethyst

Amethyst (Silicon Dioxide, SiO2)

Granite

Phaneritic Igneous Rock (composed primarily of Quartz, Feldspar, and Mica)

White Marble

Calcite-rich Metasomatized Carbonate (CaCO3)

Fish Fossil in Limestone

Lycoptera (likely) in Micritic Limestone

Jadeite Jade

NaAlSi2O6 (Sodium Aluminum Silicate)

Magnetite

Magnetite (Fe3O4)

Tiger's Eye

Pseudomorph of quartz after crocidolite (SiO2 with iron inclusions)

Sandstone (Quartzose)

Arenite (primarily SiO2)

Sandstone (Ferruginous)

Arenite (Fe2O3 staining)

Gneiss (Granitic Gneiss)

Gneiss

Quartz / Clear Quartz

Silicon Dioxide (SiO2)

Moonstone

Orthoclase Feldspar ((K,Na)AlSi3O8)