3. Gold and Diamond Evening Bag, $10,000 to $15,000

The estimate for the bag, made with 18-karat gold and baguette-cut diamonds, is based on a similar one that sold at Elizabeth Taylor's estate sale, which had a high estimate of $6,000 and fetched $218,500.

4. A Diamond, Sapphire, and Ruby Ring, $5,000 to $8,000

The origins of this ring, made by Bulgari, are unknown—did Nancy Reagan commission it? Did she receive it as a present? One thing is for sure: She wore it a lot. There's a photo of her holding it to her chest, pledging allegiance to the flag, on the USS Iowa in New York's harbor in 1986.

5. Diamond and Platinum Ear Pendants, $5,000 to $7,000

Made by Van Cleef & Arpels, the diamond and platinum pendants were worn by Reagan on a variety of official occasions.

6. A Gold and Diamond Bracelet, $5,000 to $7,000

This bracelet, designed by Bulgari, was favored by Reagan for state dinners.

7. A Gold, Diamond, and Platinum Bracelet, $5,000 to $7,000

The maker of this bracelet is unknown. Before her life in the White House, Reagan, as a governor's wife and, even earlier, a Hollywood doyenne, regularly patronized numerous L.A. jewelry stores.