Pink Opal and 3.30 ct. t.w. Ruby Drop Earrings in 18kt Rose 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.

ROSE GOLD: Gold is a precious metal which is naturally quite soft. To give it a rose color and increase its strength, gold is alloyed with other metals, such as copper and silver. 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."

WIRE: sometimes called "shepherd's hooks" or "fishhooks," earwires are a thin, hook-shaped earring backs. They thread onto the ear and can sometimes be squeezed into place or held on with a rubber clutch.

OPAL: With an iridescent luster that can reveal a beautiful kaleidoscope of color, the opal has inspired many myths and legends. A white opal with swirls of soft pastel shades is popular for jewelry, but opals also come in black and blue. Opal is the gemstone for October birthdays.

FREE-FORM: Any gemstone with an irregular shape.

RUBY: A bold fiery stone, the ruby is a symbol of wealth, vitality and love. When cut and polished, the ruby's high luster is as dazzling as a diamond's. Ruby jewelry makes the perfect gift for loved ones and is the birthstone for July.