Non-nacreous Clam Pearl, Tridacana sp.,  Coastal waters near Indonesia. Estimate: US$ 2,000 - 3,000 (€1,800 - 2,700). Photo: Bonhams.

xemplary for its symmetrical egg shape, the present pearl displays a virgin white body color and excellent flame pattern iridescence. 
Weighing approximately 7.77 carats and measuring 11.5 x 9.0mm

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