7.50 ct. t.w. Green Prasiolite and 1.80 ct. t.w. White Topaz Drop Earrings in 18kt Yellow Gold Over Sterling Silver

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."

LEVER: An earring backing with a hook-shaped insert and a hinged leverback to hold it in place.

PRASIOLITE: A warm- to yellow-green variety of quartz. It is a rare gemstone in nature and often the color comes from the process of heat treatment. It is sometimes referred to as green amethyst or lime citrine.

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

TOPAZ: Available in a stunning selection of shades, the topaz's sky blue hue is one of the most popular colors for jewelry designs. Once thought to offer protection, today topaz is favored for its durability and affordability. Yellow topaz is the birthstone for November while blue topaz is for December.