Cabochon or cabachon - from the Middle French caboche (head), is a gemstone which has been shaped and polished as opposed to faceted like a diamond. The resulting form is usually a convex top with a flat bottom.
Bail - A bail is a component of certain types of jewelry, mostly necklaces, that is used to attach a pendant. The bail is normally placed in the center of the necklace where the pendant hangs.
Hollow Form - Two convex metal shapes constructed together to form a hollow space inside. Flat sheet can also be form by building walls to form the hollow. Usually a sculptural construct of definable three dimensions.
Solder - soldering- is a process in which two or more metals items are joined together by melting and flowing a filller metal (called solder) into the joint. In jewelry making this is achieved using either propane or oxy-acetylene gas with a small torch.
Keum boo or Kum boo in Korean is a technique I like to use frequently in my work. Once mastered it is a beautiful way to add high karat gold to a piece. Thin sheets of gold are bonded to sterling silver through a heat fusion process that bonds the molecules of gold and silver together.
The origin and historical development of the keum-boo technique are little known, but it is clear that Koreans have been using brass, silver, and gold ware and utensils for their daily eating and ceremonial purposes for thousands of years. In the history of Korea, metal utensils and tableware, especially those made of silver and gold, had practical as well as aesthetic functions. Among the wealthy upper classes, silver tableware displayed status, but it also served the more practical purpose of testing food for spoilage or poison—a precaution used in the royal families for centuries.