18KT: Karat (abbreviated kt or K) is a unit that indicates the purity of gold in the metal. 18kt is 75% gold. In Europe, 18K yellow gold is most favored and used in jewelry.

YELLOW GOLD: Gold is a precious metal with a natural yellow color. It is quite soft and often alloyed with other metals to increase its strength. The purity of the metal is indicated by a unit called a "karat," with 24kt having the highest percentage of natural gold.

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."

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

SIMULATED EMERALD: A simulated emerald is an artificial stone made to imitate real emeralds. Sometimes known as "faux emerald," it does not actually hold any of the physical properties of emerald, as it could be made from acrylic, plastic, glass or CZ. Simulated emerald is very affordable and can create the same lush look for less.

BRILLIANT: A gemstone cut to enhance brilliance without sacrificing much carat weight. Typically has 58 facets.

CUBIC ZIRCONIA: once called the poor cousin to the diamond, CZs have since become a fashion statement in their own right. Perfect for travel and a little extra bling, CZ Jewelry is one of man's flawless creations.

SIMULATED RUBY: A simulated ruby is an artificial stone made to imitate real rubies. Sometimes known as "faux ruby," it does not actually hold any of the physical properties of ruby, as it could be made from acrylic, plastic, glass or CZ. Simulated ruby is very affordable and can create the same sultry look for less.

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