Rome was no longer the glamorous city where Clare Boothe Luce, the U.S. ambassador, wore a Bulgari diamond and emerald necklace on state occasions.

FORBES: Flight to quality

In addition to their daily City Bike Tour, this environmentally-friendly company offers a seasonal 15-mile autumn foliage tour along the Emerald Necklace, a network of parks and green spaces southwest of the city centre.

BBC: In Boston, leaf peeping by bike

Another stunner is the Christie's cover lot, a Bulgari emerald and diamond necklace.

FORBES: Blingtime

In August, Sophia Loren appeared at the opening night of the Venice Film Festival wearing a one-of-a-kind yellow gold, emerald and diamond necklace from Bulgari.

FORBES: One-upwomanship

While the priciest Tiffany and Cartier pieces tend to be understated, Bulgari's designs shout--like a necklace with 84 carats of ruby and 674 carats of emerald beads, embellished with diamond-set rondelles.

FORBES: Magazine Article

Consider a necklace in the 1990 Bulgari Collection Internationale: It featured 84 carats of rubies and 674 carats of emerald beads, embellished with diamond-set rondelles.

FORBES: Flight to quality