White gold began gaining popularity in the early 1900’s as an alternative to platinum.  For years, Gold has been treasured for its beauty, durability and malleability. In fact, it is so flexible that 1 ounce of gold can be hammered out into a sheet over 300 feet long!  Other features that make it an excellent choice for your fine jewelry are its resistance to tarnishing or corroding.

Gold is so delicate that it can’t be used alone in the production of jewelry.  It must be mixed with other metals or alloys, often copper, nickel and zinc to be durable enough for everyday wear. 

The amount of pure gold in a particular item is indicated within its name, for example 18kt or 14kt gold. The chart below explains the different karat weights.


Because higher karat pieces contain more gold, they will display more luster and shine.  By that logic, the lower amount of gold in a piece, the stronger it will be. This is why much of the jewelry sold today is either 18kt or 14kt gold because they are strong, while still retaining a dazzling luster.

Different countries have various laws defining what can be labeled as “gold.” The United States considers 10 parts gold (10kt) or more the legal karat limit.  The US also requires all jewelry pieces be stamped indicating its karatage.

Increased strength isn’t the only positive result of adding alloys to gold.  Adding certain metals to can create unique and beautiful colors, the most common is white gold.  Other popular styles are rose and green gold.

Sources:
http://en.wikipedia.org/wiki/Gold
http://www.gold.org/index.html