Jewel of India: So gorgeous, Marco Bicego’s Jaipur necklace, made from amethyst, blue topaz and green and pink tourmaline, is a gift you’ll want to “give” to your most generous relation. You know, the one who’ll be willing to lend it back to you—indefinitely. $3,310; Shreve & Co., 200 Post St., 415-421-2600