Elbaite (Var: Cuprian Elbaite), Quartz

Specimen ID: 9DK-T7C

Elbaite (Var: Cuprian Elbaite) : Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Quartz : SiO2
Mindat locality:
5.2cm x 3cm x 1cm

Photo added to mindat.org

A gorgeous blue translucent terminated prismatic crystal of tourmaline measuring 4.9 cm in length is set nicely upon a massive quartz matrix with other much smaller blue tourmalines. The strange color is due to copper. Measures 5.2 x 3.0 x 1.0 cm in size overall. No damage. Ref: MacDonald, D.J. and Hawthorne, F.C. (1995) Cu-bearing tourmaline from ParaĆ­ba, Brazil. Acta Crystallographica C51, 555-557.
Dan Weinrich - 4th August 2009
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