Mineral With Metamorphic Or Igneous Host

Prasiolite

Silicon Dioxide (SiO2)

Star Sapphire

Corundum (Al2O3) with Rutile inclusions

Milky Quartz with Iron Staining

Quartz (Silicon Dioxide, SiO2)

Black Tourmaline (Schorl)

Schorl (Sodium iron silicate hydroxide boron silicate); NaFe3Al6(BO3)3Si6O18(OH)4

Blue Apatite

Apatite group (Ca5(PO4)3(F,Cl,OH))

Blue Sapphire (Tumbled/Polished)

Corundum (Al2O3)

Clear Quartz (Rock Crystal)

Quartz (Silicon Dioxide, SiO2)

Quartz Vein in Host Rock

Hydrothermal Quartz (SiO2) in Slates/Schists

Quartzite with Epidote Vein

Metamorphosed Quartz Sandstone with Hydrothermal Vein

Epidote

Epidote (Ca2(Al, Fe)3(SiO4)3(OH))

Serpentinite

Serpentinite (Hydrated magnesium iron phyllosilicate)

Milky quartz-rich vein rock

Quartz, SiO₂, likely massive or microcrystalline quartz

Serpentinite

Serpentinite (Hydrated magnesium iron silicate)

Milky Quartz with Matrix

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Garnet

Almandine formula: Fe3Al2(SiO4)3

Blue Sapphire

Corundum (Al2O3)

Gold-Bearing Quartz Ore

Crystalline Silicon Dioxide (SiO2) with Trace Aurum (Au)

Hypersthene (or Enstatite/Ferrosilite)

Orthopyroxene series (Mg,Fe)SiO3 - specifically, historically hypersthene (intermediate member) now referred to as Enstatite (Mg-rich) or Ferrosilite (Fe-rich)

Garnet-bearing metamorphic rock, possibly garnet amphibolite or mica schist

Almandine garnet (Fe₃Al₂Si₃O₁₂) in a mafic, amphibole–feldspar-rich matrix

Rough Star Sapphire (Corundum)

Al2O3 (Aluminum Oxide)

Quartz (Smoky Quartz variant)

Silicon Dioxide (SiO2)

Massive Quartz with Host Rock

Silicon Dioxide (SiO2)

Ruby (in jewelry)

Corundum (Al2O3 with Chromium traces)

White Quartz

Silicon Dioxide (SiO2)

Likely quartz-bearing rock or quartz crystal fragment

Quartz, silicon dioxide (SiO₂), possibly with iron-stained matrix

Ruby

Corundum (Al2O3) with Chromium traces

Mica in Quartz Host

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

White quartz fragment

Quartz (silicon dioxide, SiO₂)

Tumbled blue-green stone, likely aquamarine-bearing pegmatite or blue apatite

Probable fluorapatite, Ca5(PO4)3(F,Cl,OH), though visual identification is uncertain

Pink quartz crystal, possibly rose quartz

Quartz (silicon dioxide, SiO₂), likely pink quartz/rose quartz

Milky Quartz (or Vein Quartz)

Silicon Dioxide (SiO2)

Clear Quartz Crystal

Silicon Dioxide (SiO2)

Blue Sapphire

Corundum (Al2O3 - Aluminum Oxide)

Amethyst (Quartz variety)

Amethyst [Silicon Dioxide (SiO2)]

Vein Quartz in Basalt or Mafic Rock

Silicon Dioxide (Quartz veins in volcanic host rock)

Quartz Vein in Metamorphic Rock

Quartz-veined Schist or Gneiss

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) within Metasedimentary or Igneous Matrix

Dearest Ring (Gemstones)

Mixed Gemstones: Diamond (C), Emerald (Be3Al2Si6O18), Amethyst (SiO2), Ruby (Al2O3), Sapphire (Al2O3), Topaz (Al2SiO4(F,OH)2)

Sapphire (Corundum)

Corundum (Al2O3)

Milky Quartz

Silicon Dioxide (SiO2)

Garnet

Almandine/Pyrope Garnet (Silicate Mineral Group)