Color in the Beryl group.

The color of beryl, ideally Be3Al2Si6O18, is usually dominated by its Fe2+ and Fe3+ content. Fe2+ produces pale blue color, Fe3+ produces golden-yellow color, and when both Fe2+ and Fe3+ are present, the color is a darker blue. Green color in iron-containg beryls commonly results from a mixture of blue and yellow. Green color can also come from Cr3+ as is found in the variety emerald. Green color is also caused by V3+. Manganese-containing beryls are pink to red color. The color is pale pink when the manganese is present as Mn2+ and red when Mn3+ is present. Some blue beryls originally found at the Maxixie mine in Brazil have color from radiation-induced color centers. Pezzottaite, CsBe2LiAl2Si6O18, and bazzite, Be3Sc2Si6O18, are both related to beryl and show similar colors. In the spectra of all these minerals, sharp features in the near-infrared region arise from water molecules in the c-axis channels of the beryl structure.

Beryl Visible Spectra (generally 350 - 2500 nm)

Aquamarine (Blue beryl)

Synthetic Aquamarine (Blue to green beryl)

Maxixie Beryl (Blue beryl)

Bazzite (Blue)

Emerald (Green beryl)

Synthetic Emerald

Golden Beryl

Red Beryl

Natural Pink Beryl

Pezzottaite (Pink)

Synthetic Pink Beryl

Link to an extensive collection of references to mostly color and visible spectroscopy of beryls

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revised 3-Jul-2022