How the World Works: A Hands-On Guide to Our Amazing Planet

Everyone needs a guardian angel. This pretty pendant with its cut-out angel design is highlighted by round-cut diamonds (1/10 ct. t.w.) and a chic sterling silver setting with an 18k gold over sterling silver heart accent. Approximate length: 18 inches. Approximate drop: 1 inch.

An iridescent sheen adds elegance to any look. Necklace features an oval-cut opal (9/10 ct. t.w.) accented by three, round-cut, diamond accents. Setting and chain crafted in 10k gold. Approximate length: 18 inches. Approximate drop: 3/4 inch.

Sugary sweet style you can wear! Sweethearts' "YOU AND ME" pendant features a green enamel surface and polished, sterling silver setting and chain. Copyright © 2011 New England Confectionery Company. Approximate length: 16 inches + 2-inch extender. Approximate drop: 1/2 inch.

Stunning in sapphire. This 14k gold necklace prominently features sapphire (50 ct. t.w.) set offf by diamond accents for a stylish effect. Approximate length: 18 inches. Approximate drop: 3 inches. Approximate width: 1-1/4 inches.