White and black diamond pendant set in 18k white gold; $3,195; Forum Design, Scottsdale, Ariz.; 480-907-7695; forumdesign.net

White and cognac diamond necklace with a sterling silver handmade chain; $2,900; Belle Brooke Designs Inc., Los Angeles; 213-488-9470; bellebrooke.net

Black rhodium diamond filigree earrings with oval drop charms; $1,215; KC Designs, New York City; 212-921-9270; www.kcdesignsnyc.com

White diamond and treated black diamond ring set in 14k white gold; $1,948; William Lam & Co., New York City; 212-354-3896; williamlam.com

Necklace in 18k white gold with 27.70 cts. t.w. diamonds; $218,760; Uneek Jewelry, Los Angeles; 888-BE-UNEEK; uneekjewelry.com