Mineral Based Alloy (Anthropogenic)

Granitoid (Granite/Gneiss mix)

Phaneritic Felsic Igneous Rock

Muscovite Mica in Quartz

Potassium Aluminum Silicate Hydroxide (KAl2(AlSi3O10)(OH)2) and Silicon Dioxide (SiO2)

Amygdaloidal Basalt

Basalt with secondary mineral infilling (commonly SiO2 or Zeolites)

Greenschist

Chlorite schist

Biotite Mica

K(Mg,Fe2+)3(Al,Fe3+)Si3O10(OH,F)2

Quartz in Basalt (Xenocryst)

Silicon Dioxide (SiO2) in Mafic Igneous Volcanic Rock

Granite

Phaneritic Plutonic Felsic Rock (KAlSi3O8 + SiO2 + NaAlSi3O8)

Lepidolite

K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2

Granodiorite (or Granite) Pebble

Phaneritic Felsic Igneous Pebble

Blue Topaz (specifically London Blue or Swiss Blue based on color saturation)

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

Emerald in Matrix

Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities

Emerald

Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities

Lepidolite with Rubellite Tourmaline

K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lepidolite mica)

Fuchsite

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

Graphite

Graphite (Native Carbon, C)

Granite

Granite

Mica-rich Schist fragment

Mica Schist

Dalmatian Stone

Dalmatian Jasper / Feldspathic Igneous Rock

Granite

Granite (Alkali-feldspar, Quartz, and Plagioclase composition)

African Turquoise

African Turquoise (a trade name for Jasper, a variety of Chalcedony: SiO2)

Granite

Phaneritic Igneous Rock (Granite)

Amethyst (Geode Fragment)

Silicon Dioxide with iron impurities (SiO2)

Dalmation Stone (Dalmation Jasper)

Peralkaline rock (primarily Feldspar and Quartz with Arfvedsonite spots)

Schist

Mica Schist

River Pebble (Quartzite/Siltstone mixture)

Silicon Dioxide (SiO2) mixture with varied clastic minerals

Porphyritic Andesite

Andesite (with white Plagioclase phenocrysts)

Lepidolite in Quartz (or Lepidolite Ore)

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2) in Quartz (SiO2)

Quartz on Schist

Silicon Dioxide (SiO2) on Foliated Metamorphic Rock

Synthetic Blue Aura Quartz

Silicon Dioxide (SiO2) with Metallic Infusion

Lepidolite

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)

Gneiss

Gneiss (Metamorphic rock composed primarily of quartz, feldspar, and mica)

Heat-Treated Amethyst (Commercial Citrine)

Silicon Dioxide (SiO2) with iron impurities

Labradorite

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

Labradorite (Gray Tumbled)

Labradorite (Ca,Na)(Al,Si)4O8

Schist

Mica Schist

Muscovite Mica

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

Graphite

Graphite (C)

White Topaz

Aluminum silicate fluoride hydroxide [Al2SiO4(F,OH)2]

Muscovite Mica in Quartz Matrix

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

Diamond (or Diamond Simulant)

Carbon (C) or Zirconium dioxide (ZrO2) for CZ

Lepidolite

K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lithium-bearing Phyllosilicate)

Gneiss (specifically a Hornblende Gneiss or Micaceous Gneiss)

Gneiss (metamorphic rock composed primarily of quartz, feldspar, and mafic minerals)