Natural Pearl, Unio species. Photo Bonhams.

A nacreous, freshwater white pearl, of elongated drop-shaped form, having excellent luster, especially to one face as well as a fine orient of pink and green hues, undrilled. Weighing approximately 43.5 carats and measuring 25.79 x 19.41 x 12.30mm. Estimate US$ 1,500 - 2,000 (€1,100 - 1,400)

Accompanied by a Gemological Institute of America report number 2155766649, dated December 13, 2013 stating that the 43.55 carats pearl is a natural pearl, freshwater, Unio species, white, no indications of treatment.

Bonhams. GEMS, MINERALS, LAPIDARY WORKS OF ART AND NATURAL HISTORY. Los Angeles, 20 May 2014 10:00 PDT - www.bonhams.com