Platinum, Natural Pearl and Diamond Necklace. Photo Doyle New York

The graduated necklace set continuously with 25 natural button-shaped and round pearls approximately 8.1 to 4.3 mm., and one freshwater natural pearl approximately 7.6 mm., encircled and spaced by 277 old European, old-mine and single-cut diamonds approximately 12.00 cts.,circa 1905, approximately 29 dwts. Length 17 inches. Estimate $30,000-40,000

WIth SSEF report no. 60644 stating that the pearls are natural, saltwater, the 12th pearl is natural, freshwater.

Doyle New York. Important Jewelry. Monday, April 15, 2013 http://www.doylenewyork.com