The 300-carat necklace thought to be at the center of the infamous 'Affair of the Diamond Necklace' that contributed to the ...

Omas fountain pen: Omas Limited Edition Europa fountain pen in the original display box. The pen, number 3133 out of a limited edition of 3500 produced, has a two-tone 18K gold nib (est. $675-$800).

Sierra Auction has listed the items available and says online bidding is now open ... appraised at $80,000 and other high-end jewelry with diamond-encrusted pieces and custom designs.