C. 1990 Vintage Tiffany Jewelry Woman's Black Leather Strap 30mm Watch with 14kt Yellow Gold

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.

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.

QUARTZ: From the icy shimmer of rock crystal quartz to the delicate pink of rose quartz to the moody hues of smoky quartz, this gemstone offers something for everyone. Quartz, found in endless colors and varieties, is a popular choice for bracelets, necklaces, rings and earrings.

LEATHER: A material made from tanning an animal hide, leather is flexible, durable, and creates a rugged look. Different processes of tanning result in different colors and textures.

BUCKLE: A clasp that features the same mechanism as a classic belt buckle. Sometimes used in leather or material bracelets, a buckle straps one end through a loop and secures it with a hinged prong that inserts into a hole and rests against a metal frame.