Igneous And Sedimentary Mixture

Snowflake Obsidian

Volcanic glass with Cristobalite inclusions (70–75% SiO2)

Granite

Granite (Mainly Quartz, Feldspar, and Mica)

Obsidian / Volcanic Glass

Obsidian (principally SiO2, usually 70% or more)

Granite

Granite (Phaneritic igneous rock)

Granite

Phaneritic intrusive felsic igneous rock

Granite

Plutonic Igneous Rock (composed of Quartz, Feldspar, and Mica)

Granodiorite

Granodiorite (Phaneritic intrusive igneous rock containing Plagioclase, Quartz, and Biotite/Amphibole)

Obsidian (Apache Tear)

Amorphous Volcanic Glass (SiO2 + impurities)

Basalt (River Pebble)

Basalt (Mafic Extrusive Igneous Rock)

Orthoclase (Potassium) Feldspar in Quartz

KAlSi3O8 (Potassium Aluminum Silicate)

Granite with Quartz Vein

Phaneritic Felsic Igneous Rock (composed of Quartz [SiO2], Feldspar, and Mica)

Granitic Pegmatite with Biotite

Pegmatitic Granite (contains KAlSi3O8, SiO2, K(Mg,Fe)3AlSi3O10(OH)2)

Granitic Pegmatite with Schorl

Granitic Pegmatite (Schorl: NaFe3Al6(Si6O18)(BO3)3(OH)3OH)

Granite

Granite (Phaneritic intrusive igneous rock) - Composition: SiO2, Al2O3, K2O, Na2O

Granite

Phaneritic Igneous Rock (composed of quartz, alkali feldspar, and plagioclase)

Granite

Granite (Felsic Plutonic Rock)

Mahogany Obsidian

Volcanic glass (SiO2 + Fe2O3)

Obsidian (Black)

Obsidian (approx. 70–75% SiO2)

Granite (Pink/Potassium-rich)

Phaneritic Plutonic Felsic Igneous Rock (primarily SiO2 with KAlSi3O8)

Obsidian (Black Obsidian)

Obsidian (Volcanic Glass)

Pegmatite

Granitic Pegmatite

Granite

Phaneritic plutonic rock (composed mainly of SiO2, Al2O3, K2O, and Na2O)

Milky Quartz

Silicon Dioxide (SiO2)

Spinel

Magnesium Aluminum Oxide (MgAl2O4)

Sodalite-rich Syenite (Sunset Sodalite)

Sodalite-Syenite (Na8[Al6Si6O24]Cl2 with KAlSi3O8)

Milky Quartz

Silicon Dioxide (SiO2)

Amethyst

Silicon Dioxide (SiO2) with trace Iron (Fe3+)

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(F,OH)2)

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Amethyst (Tumbled)

Silicon Dioxide (SiO2 with iron impurities)

Almandine Garnet

Iron aluminum silicate (Fe3Al2(SiO4)3)

Carnelian (Orange Chalcedony)

Silicon dioxide (SiO2)

White Topaz

Al2SiO4(F,OH)2 (Aluminium Silicate Fluoride Hydroxide)

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Ruby Zoisite

Anyolite (Composition of Green Zoisite, Black Tschermakite, and Red Corundum)

Bornite (Peacock Ore)

Bornite (Cu5FeS4)

Muscovite on Quartz (Mica host rock)

KAl2(AlSi3O10)(OH)2 (Muscovite) in SiO2 (Quartz)

Smoky Quartz Cluster

Quartz (Silicon Dioxide) - SiO2

Amethyst (Rough)

Silicon Dioxide with iron impurities (SiO2)

Greenschist

Greenschist facies rock (containing chlorite, actinolite, and epidote)

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Scoria (Vesicular Basalt)

Scoria (Vesicular Igneous Rock)