Home » Categories » Jewelry Education

What is the difference between Karat and Carat in jewelry?

By Robert Underhill

     There is often confusion between the terms Carat and Karat or CT and KT.

           Karat is a term used to indicate gold purity. In many countries it is a legal standard to stamp gold jewelry with markings such as 10KT, 14KT and 18KT. The Karat stamp indicates the purity of the metal. Pure gold is 24 karat so the number preceding the KT marking indicates how many parts out of 24 are pure gold. For example 14KT indicates that there are 14 units of pure gold mixed with 10 units of other metal. These alloys are added to control durability, color and cost of fine jewelry.

          Carat is a unit of weight used to measure diamonds and precious gemstones. In ancient times traders used carob seeds on balance scales to determine the weight of gemstones. As time passed the term carob evolved into the word carat and an exact weight was assigned. In modern times the carat is equal to 1/5 of a gram. A carat is broken down into 100 units known as points. Stones that weigh less than 1 carat are indicated by a decimal point. An example is that a half carat stone weighs .50ct.

Attachments Attachments
There are no attachments for this article.
Comments Comments
There are no comments for this article. Be the first to post a comment.
Related Articles RSS Feed
How is gold soldered?
Viewed 1614 times since Tue, Nov 30, 2010
What is a penny weight?
Viewed 1599 times since Thu, Dec 16, 2010
Why are platinum prongs best for engagement rings?
Viewed 5164 times since Thu, Feb 10, 2011
What is diamond melee?
Viewed 19104 times since Thu, Dec 16, 2010
What is a head or crown?
Viewed 1775 times since Thu, Feb 10, 2011
What is a ring shank?
Viewed 19771 times since Thu, Feb 10, 2011
What Karat Gold is Best?
Viewed 17746 times since Tue, Nov 30, 2010