AZ Oyster, you're ahead of the game in that you know they're cultured pearls. It looks like a nice strand of small pearls (5.5 mm), in a popular length, with a standard design clasp. Unless they're from a desirable maker, necklaces like this are selling for less than $200 on eBay.
The clasp on the necklace should be marked with the gold content, say 14k or 18k, and a maker's mark or trademark. You can see the trademark for Albert David
here. If you find the pearls are from Albert David, you might want to get in touch with them to see if someone there can give you more information.
From
Manta.com:
Albert David Inc
25 W 36th Street # 9
New York, NY 10018-7682
About Albert David Inc
Website:
Information not found
Phone:
(212) 714-0266
Business Categories
Pearls in New York, NY
Whol Pearls Precious Stones & Mfg Precious Jewelry
Jewelry Stores
Albert David Inc in New York, NY is a private company categorized under Pearls. Our records show it was established in 1984 and incorporated in New York. Current estimates show this company has an annual revenue of $2.5 to 5 million and employs a staff of approximately 10 to 19.
Products or Services: South Sea Pearls, Mikimoto Pearls, Blue Pearl, Pink Pearls and Natural Pearls.