C. 1980 Vintage 1.05 ct. t.w. Multi-Gem Ring in 18kt Yellow Gold. Size 7

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.

BRUSHED: A low-luster finish with a very fine texture that looks as if it were applied with a wire brush.

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.

SQUARE: A symmetrical shape with four equal sides.

IOLITE: Ranging in shades from light blue to violet blue to deep rich blue, the iolite mesmerizes with its ability to change colors when viewed from different angles. Long ago, Vikings relied on this unique gemstone to help guide them at sea.