Mineral (Gemstone Variety Of Beryl)

Pegmatitic quartz–feldspar rock with mica

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

Green beryl (probable emerald-like beryl) in matrix

Beryl, Be₃Al₂Si₆O₁₈; green color from chromium/vanadium (emerald when gem-quality)

Blue Apatite

Fluorapatite / Apatite Group (Ca5(PO4)3(F,Cl,OH))

Emerald and Diamond

Beryl (Be3Al2(SiO3)6) and Carbon (C)

Quartz-rich pegmatite with mica

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

Pegmatite (Granitic Pegmatite)

Pegmatite (Quartz + Potassium Feldspar + Mica)

Yellow faceted gemstone, likely citrine or yellow beryl

Quartz (SiO₂), if citrine; beryl (Be₃Al₂Si₆O₁₈), if heliodor

Pegmatite (likely Granitic Pegmatite)

Pegmatite (a coarse-grained igneous rock, often with granitic composition)

Amethyst cluster

Amethyst, purple quartz (SiO₂)

Mixed Gemstone and Mineral Collection

Mixed Silica and Carbonate minerals (SiO2, CaSO4·2H2O, etc.)

Emerald

Beryl (Be₃Al₂Si₆Oထ₈) with Chromium/Vanadium impurities

Blue-green mineral fragment, possibly aquamarine (beryl)

Unconfirmed; aquamarine is blue-green beryl, Be₃Al₂Si₆O₁₈

Quartz (Water-worn Pebbles)

Silicon Dioxide (SiO2)

Amazonite in Pegmatite Matrix with Smoky Quartz

K(AlSi3O8) - Microcline (var. Amazonite) with SiO2 (Quartz)

Quartz

Silicon Dioxide (SiO2)

Gemstone ring, likely emerald and opal

Green beryl (Be₃Al₂Si₆O₁₈), with probable common opal (hydrated amorphous silica, SiO₂·nH₂O)

Smoky Quartz

Silicon Dioxide (SiO2)

Faceted Gemstones (Mixed)

Various (e.g., Corundum, Beryl, Quartz, or synthetic equivalents)

Quartz

Silicon Dioxide (SiO2)

Mica-bearing quartz rock, likely pegmatite

Quartz–feldspar–mica pegmatite; visible mica is probably biotite or muscovite, SiO₂ quartz

Green tourmaline crystal (likely elbaite)

Elbaite tourmaline, a complex borosilicate: Na(Li,Al)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄

Granitic Pegmatite

Granite Pegmatite (principally KAlSi3O8, SiO2, and KAl2(AlSi3O10)(OH)2)

Gemstone bead necklace (likely citrine or yellow quartz)

Quartz, SiO₂; precise identification is uncertain because the beads are blurred and metal settings obscure them

Mixed Tumbled Gemstones and Minerals

Various silicate and oxide minerals

Granitic Pegmatite (with Pink Feldspar and Quartz)

Pegmatite (KAlSi3O8 + SiO2)

Lake Superior Agate

SiO2 (Quartz variety)

Quartz-bearing pegmatite

Quartz (SiO₂) with feldspar and mica, likely a granitic pegmatite

Quartz with Feldspar and Mica (Pegmatite Fragment)

Granitic Pegmatite

Aquamarine in Onyx / Blue Topaz Pendant

Beryl (Be₃Al₂Si₆O₁₈) or Topaz (Al₂SiO₄(F,OH)₂)

Quartz-rich pegmatite specimen

Pegmatite composed mainly of quartz (SiO₂), feldspar, and mica, with possible tourmaline or garnet inclusions

Smoky quartz ring

Quartz (SiO₂), likely smoky quartz; the surrounding stones and metal cannot be identified reliably from the image.

Almandine Garnet

Almandine, Fe3Al2(SiO4)3

Likely garnet-bearing rock, possibly a garnet crystal in matrix

Garnet, probably almandine (Fe₃Al₂(SiO₄)₃), on a dark metamorphic host rock

Pegmatite

Intrusive Igneous Rock

Quartz-rich pegmatite fragment

Granite-family pegmatite; chiefly quartz (SiO₂), feldspar, and black mica (biotite)

Quartz

Silicon Dioxide (SiO2)

Chert (Flint)

Silicon Dioxide (SiO2)

Tiger's Eye (Multicolor/Variegated)

Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxides)

Pegmatite

Pegmatite (Coarse-grained igneous rock)

Green faceted bead strand, likely dyed or synthetic material

Uncertain; possibly green-dyed quartz, glass, or lab-created emerald-like material

Emerald

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

Tumbled emerald chips

Emerald, green beryl (Be₃Al₂Si₆O₁₈), colored mainly by chromium and/or vanadium