Metal (Elemental Mineral)

Celestite (Celestine)

Celestine (SrSO4)

Blue Quartz (Aventurine)

Silicon Dioxide (SiO2) with inclusions of crocidolite or dumortierite

Biotite (Black Mica)

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

Lepidolite on Pegmatite

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

Greenstone / Graywacke

Metagraywacke (Chlorite-grade schistose rock)

Emerald in Matrix (Quartz/Calcite)

Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities

Amethyst

Silicon dioxide / Quartz (SiO2+Fe4+)

Pegmatitic pink feldspar–quartz rock

Granitic pegmatite; chiefly microcline/orthoclase feldspar (KAlSi₃O₈), quartz (SiO₂), and minor mica

Crocoite

Lead chromate (PbCrO4)

Blue Quartz (Dumortierite Quartz)

Silicon Dioxide (SiO2) with inclusions of Dumortierite (Al7BO3(SiO4)3O3)

Rough Green Sapphire (Corundum)

Corundum (Al2O3 - Aluminum Oxide with trace elements)

Pegmatite

Pegmatitic Granite

Blue Sapphire (Raw)

Corundum (Al2O3)

Honey Calcite

Calcium Carbonate (CaCO3)

Pegmatitic quartz–feldspar rock with mica

Granitic pegmatite; mainly quartz (SiO₂), feldspar, and biotite/muscovite mica

Blue Sapphire Crystal (Rough)

Corundum (Aluminum Oxide, Al2O3)

Ruby

Corundum (Al2O3 with Chromium traces)

White Sapphire

Corundum (Al2O3)

Blue Quartz (specifically Dumortierite Quartzite)

Silicon Dioxide (SiO2) with inclusions of Dumortierite (Al7BO3(SiO4)3O3)

Blue Quartz (Dumortierite Quartz)

SiO2 containing inclusions of Dumortierite [Al7(BO3)(SiO4)3O3]

Rough Gemstone Grains (Mixed Sapphires and Quartz)

Corundum (Al2O3) and Quartz (SiO2)

Pink Tourmaline (Rubellite) in Lepidolite

Elbaite (Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)4) in Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)

Rose Quartz

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

Agate Slice (Carnelian Agate)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Blue Calcite

Calcium Carbonate (CaCO3)

Mica-bearing quartz rock (likely pegmatite)

Quartz–feldspar–mica pegmatite; dark mica is probably biotite, possibly muscovite or chlorite

Emerald

Beryl (variety Emerald), Be3Al2Si6O18 with Cr and/or V

Ruby

Corundum (Al2O3)

Rough Green Fluorite

Fluorite (Calcium Fluoride - CaF2)

Jadeite (Jade)

Jadeite; NaAlSi2O6

White Sapphire

Corundum (Al2O3)

Pink Sapphire

Corundum (Al2O3 with trace Chromium and Iron)

Tumbled pink-and-white quartz

Quartz, silicon dioxide (SiO₂), likely rose quartz mixed with milky quartz

Petrified Wood

Silicified Wood (SiO2)

Yellow Jadeite

NaAlSi2O6 (Sodium Aluminum Silicate)

Lepidolite

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

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood

Silicified Wood (SiO2)

Blue Quartz

Silicon Dioxide (SiO2) with fibrous inclusions (such as tourmaline, magnesio-riebbeckite, or crocidolite)

Rainbow Fluorite

Fluorite (Calcium Fluoride, CaF2)

Blue Quartz

Silicon Dioxide (SiO2) with microscopic inclusions

Blue Quartz

Silicon Dioxide (SiO2) with inclusions