C. 1960 Vintage Cultured Pearl and Green Jade Ring in 18kt Yellow Gold. Size 7.5

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.

JADE: Available in many nuances of green, plus black, red, brown and white, jade has been treasured for its beauty and strength since prehistoric times. Prized above all other gemstones in ancient China, jade jewelry continues to captivate with a Far East mystique.

OVAL: An elliptical shape that resembles an egg.

CULTURED PEARLS: Likened to the moon, pearls have been valued for their luminous glow and natural beauty for thousands of years. Today, high-quality cultured freshwater pearls make pearl jewelry affordable to all. Pearl is the traditional birthstone for the month of June.