Black Onyx and Rhinestone Heart Pendant Necklace in 14kt Yellow Gold Over Resin. 18"

14KT: Karat (abbreviated kt or K) is a unit that indicates the purity of gold in the metal. 14kt is 58.33% gold. In the United States, 14K yellow gold is most favored and used in jewelry.

GOLD OVER RESIN: Called "Andiamo," this is a karated gold formed over a resin core. The resin interior gives gold durability and resistance to denting.

CABLE: One of the most popular and classic of chain styles, created from interlocking oval links unvarying in size.

SPRINGRING CLASP: Invented in the early 1900s this diminutive device is highly effective. It's a hollow circular metal fastener with a spring opening. This keeps the clasp closed.

RHINESTONE: An imitation gemstone created from glass, acrylic, or rock crystal quartz. Rhinestones are typically faceted and foiled on the underside to create different colors. Originally, a "rhinestone" was a crystal found in the Rhine River, which is where it gets its name.

SINGLE-CUT: A gemstone cutting technique that dates back to the 1300s. Still used today, the single-cut usually features 18 facets that go in one direction without crossing each other.

ONYX: A favorite of the ancient Greeks and Romans, this gemstone adds a sophisticated shine to rings, necklaces, bracelets and earrings. A dyed form of chalcedony, onyx is most popularly found in black although it can be green, white or red, as well.

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