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.

ENAMEL: Enamel is a glass-like colored coating which is applied or "painted" over the surface of a piece of metal, ceramic or glass. Enamel is made from powdered glass or an epoxy resin material.

CRYSTAL: Though traditionally the term "crystal" was given to glass with a 24% lead content, today it is used in a more general sense to describe transparent and highly refractive glass formed with silica, oxide, or other additives. Crystal is used in serveware, barware, home accents, and jewelry.

CABOCHON: A style of cutting gemstones to achieve a smooth, domed surface with an absence of facets.