C. 1900 Vintage .65 ct. t.w. Diamond and Blue Enamel Ring in 14kt Yellow Gold with Sterling Silver. Size 8

STERLING SILVER: Also known as "Standard Silver," sterling silver is silver alloyed with other metals to increase the hardness and durability. Generally, sterling is 92.5% silver and 7.5% other metals. Some sterling silver jewelry is plated with 14kt-18kt gold and referred to as "vermeil," or "gold over sterling."

14KT: Karat (abbreviated kt or K) is a unit that indicates the purity of gold in the metal. 14kt is 58.33% gold. In the United States, 14K yellow gold is most favored and used in jewelry.

Diamond: The hardest and most brilliant of all gemstones, a diamond can make the heart race with its pure and fiery spark. An ancient symbol of love, a diamond is the preferred gemstone for tokens of affection, such as rings, earrings, necklaces and bracelets. Diamond is the birthstone for April.

PEAR: Similar to the outline of a pear fruit, this is a round shape that comes to a point on one side.

ROSE-CUT: An antique gemstone cut dating back to the 1500s, with a flat back and a faceted top.

Color Grade H-I: Near-colorless

CLARITY SI1: Slightly Included. Inclusions are noticeable under 10x magnification.