Metamorphic Or Igneous

Basalt with Iron Oxidation

Mafic Igneous Basalt

Rutilated Quartz

SiO2 (Quartz) with TiO2 (Rutile inclusions)

Anthracite Coal

Anthracite (Carbon-rich metamorphic coal)

Schist

Mica Schist

Quartz (Milky/Iron-stained)

Silicon Dioxide (SiO2)

Kyanite (Blue or Blue-Grey)

Kyanite (Al2SiO5)

Ferruginous Quartz (Iron-stained Quartz)

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions

Quartz Vein in Host Rock

Silicon Dioxide (SiO2)

Quartzite

Quartzite (primarily composed of SiO O₂)

Quartzite Pebble

Metamorphosed Sandstone (SiO2)

Quartzite

Quartzite (primarily SiO2)

Quartz with Hematite Inclusions

Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3)

Milky Quartz

Silicon Dioxide (SiO2)

Diorite (Salt and Pepper Rock)

Diorite

Gneiss (specifically a Granitic Gneiss specimen)

Gneiss (high-grade metamorphic rock primarily composed of Quartz, Feldspar, and Biotite/Amphibole)

Quartzite

Quartzite (primarily SiO2)

Granite

Granite

Granite

Granite (Felsic Plutonic Rock)

Dalmation Stone (Dalmation Jasper)

Peralkaline rock (primarily Feldspar and Quartz with Arfvedsonite spots)

Rutilated Quartz (likely Citrine or Smoky Quartz with Rutile inclusions)

SiO2 with TiO2 inclusions (Quartz with Rutile)

Quartzite

Quartzite (primarily SiO2)

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Green Quartzite

Metamorphic rock primarily composed of Silicon Dioxide (SiO2) with mineral inclusions like fuchsite or chlorite

Banded Slate or Siltstone with Quartz/Calcite Veins

Protolith-derived Siltstone or Slate (varies based on degree of metamorphism)

Felsic Igneous Rock (likely Rhyolite or weathered Granite)

Felsic Volcanic/Plutonic Rock

Emerald

Beryl (Be₃Al₂Si₆O₁₈), specifically the green variety colored by trace amounts of chromium or vanadium.

Tiger's Eye

Tiger's Eye (a variety of Chalcedony, which is a microcrystalline quartz with fibrous inclusions of oxidized crocidolite)

Jade (Nephrite or Jadeite)

Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (Na(Al,Fe3+)Si2O6)

Quartz (River-worn Pebble)

Quartz (SiO2)

Pink Quartzite

Quartzite (SiO2)

Aquamarine and clear quartz

Aquamarine (Be3Al2Si6O18), Quartz (SiO2)

Basalt

Basalt (Mafic volcanic rock)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Blue Kyanite

Kyanite (Al2SiO5)

Graphite

Graphite (Native Carbon, C)

Rough Ruby (Corundum) in Zoisite Matrix

Al2O3 (Aluminum Oxide) with Ca2Al3(SiO4)3(OH)

Serpentine

Serpentinite (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4

Amazonite

Microcline (KAlSi3O8) with Pb impurities

Grey Agate

Silicon Dioxide (SiO2) - variety: Agate/Chalcedony

Banded Agate

Cryptocrystalline Quartz (SiO2)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Tiger's Eye (Inlaid in a band)

SiO2 (Silicon Dioxide with Crocidolite inclusions)