Mineral (Metamorphic Pseudomorph)

Amethyst

SiO2 (Silicon Dioxide with Iron impurities and natural radiation influence)

Quartz (Milky or Common Quartz)

Silicon Dioxide (SiO2)

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Rough Emerald (Beryl)

Emerald (Be3Al2(SiO3)6 with Cr/V impurities)

Rhodonite

Manganese Silicate (Mn,Fe,Mg,Ca)SiO3

Blue Sapphire

Corundum (Al2O3 with trace Titanium and Iron)

Clear Quartz Crystal

Silicon Dioxide (SiO2)

Green Aventurine

Quartz (Silicon Dioxide) with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)

Pyrite (Iron Pyrite)

Iron Sulfide (FeS2)

Schorl (Black Tourmaline) in Quartz Matrix

Schorl: NaFe3Al6(BO3)3Si6O18(OH)4 (Complex Borosilicate)

Clear Quartz Crystal Cluster

Silicon Dioxide (SiO2)

Emerald

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

Ruby (Corundum)

Al2O3 (Aluminium oxide with Chromium impurities)

Raw Citrine (Yellow Quartz)

Citrine / Silicon Dioxide (SiO2)

Biotite (Black Mica)

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

Smoky Quartz

Silicon Dioxide (SiO2)

Blue Sapphire

Corundum (Al2O3 - Aluminum Oxide)

Rough Emerald/Green Beryl

Beryl (Be3Al2(SiO3)6) with trace amounts of Chromium or Vanadium

Quartz Pebble

Silicon Dioxide (SiO2)

Smoky Quartz

Smoky Quartz (Silicon Dioxide - SiO2)

Hematite

Iron(III) oxide (Fe2O3)

Quartz (Milky or Rough Quartz)

Silicon Dioxide (SiO2)

Amber and Citrine Quartz

Succinite (Amber) and Silicon Dioxide (SiO2 / Citrine)

Gneiss

Gneiss (pronounced 'nice')

Quartz (Milky/Clear variety)

Silicon Dioxide (SiO2)

Labradorite

Labradorite (Plagioclase Feldspar Series) - (Ca, Na)(Al, Si)4O8

Labradorite

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

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Green Aventurine

Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)

Quartzite

Metamorphosed Quartz Sandstone (SiO2)

Jade

Jade can refer to two distinct minerals: Nephrite (a variety of the mineral actinolite, Ca2(Mg,Fe)5Si8O22(OH)2) and Jadeite (Na(Al,Fe3+)Si2O6). Based on the image, showing a relatively uniform green color and possibly slight translucence in bead form, it is very likely one of these, but determining which one from a photo is difficult without specific testing.

Fluorite-Gedrite in Quartz (Schist)

Fluorite (CaF2) with Gedrite in Quartz/Feldspar Matrix

Lapis Lazuli

Lazurite-dominant rock, (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2

Green Aventurine

Silicon Dioxide (Quartz) with inclusions of Fuchsite mica; Chemical formula: SiO2 + K(Al,Cr)2AlSi3O10(OH)2

Schist

Mica Schist (formula variable based on mineral content, typically containing [K,Al,Fe,Mg,Si,O,H])

Gneiss

Gneiss (High-grade regional metamorphic rock)

Mica Schist

Muscovite/Biotite Schist

Gneiss

Gneiss (High-grade Metamorphic Rock)

Schist

Mica Schist

Green Aventurine

SiO2 (Silicon Dioxide with inclusions of Fuchsite)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)