C. 1950 Vintage 3.76 ct. t.w. Multi-Gem and 2.40 ct. t.w. Diamond Bug Pin Pendant in Two-Tone Sterling Silver

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.

GOLD OVER STERLING: Sometimes referred to as "vermeil," this metal is gold-plated sterling silver. It is one of the most desirable gold-plated metals and can come in 14kt-24kt yellow, white, or rose.

REVOLVER: A safety that conceals the point of a pin and keeps it in place with a revolving lever mechanism.

FIXED: A bale that is worked into the actual design of a pendant. Typically seen in slide pendants.

TOURMALINE: the "gemstone of the rainbow" comes in a dizzying array of colors and is usually created from more than a dozen elements, making it perfect for jewelry. The most popular tourmaline is deep pink, and a true favorite is watermelon... a gem of green and pink together.

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

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.

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

CLARITY SI2: Slightly Included. Inclusions are noticeable under 10x magnification.

EMERALD: the birthstone of May, and from the beryl mineral family, the emerald has been a prized possession of royalty since ancient times and a good quality emerald can be as or even more expensive than a fine diamond of the same carat. Emeralds are considered the traditional gift for the 55th wedding anniversary.

OVAL: An elliptical shape that resembles an egg.

MOONSTONE: named for the white reflection that mimics the reflection of moonshine. Typically polished and featuring a cabochon cut, moonstone's light-catching shimmer is perfect for fine jewelry. In Europe, moonstone is the birthstone for June.