Exceptional Green Tourmaline. Estimate US$ 5,500 - 6,000 (€4,800 - 5,300). Photo Bonhams. 

A species which is typically plagued by poor clarity, the present stone displays exceptional clarity. A rich bottle green, this stone would readily lend itself to being mounted as a fashionable item of "statement jewelry." Weighing approximately 28.03 carats and measuring 20.5 x 15.0 x 8.5mm

Bonhams. LAPIDARY WORKS OF ART, GEMSTONES AND MINERALS INCLUDING GOLD, 19 May 2015 10:00 PDT - LOS ANGELES