18K gold or 18 Karat gold is 75% pure (18/24) and is softer than the 14 karat gold due to less alloy concentration.

What is it used for
18 Karat gold is used to make higher grade jewelry and artifacts. People demand it more on special occasions. But another important use of 18 karat gold is in special manufacturing of highly performing electronic chips and and electric circuits that need to achieve a certain performance standard. 18 karat with sufficient conducting capacity has proven to be successful for special technology requirements.

Where it is popular
Often more, 18 karat gold is found in more protected places. Such as in airport duty frees and not easy accessible places, such as the highest floor in a building which is proofed with two steal doors each weighing over 150kgs. Usually people who are not window shopping and who have certain requests go to look for 18 karat gold merchandise.

Pros
18 karat gold is commonly considered as pure and high quality. It is the most favored type in occasions and special industries.

Cons
The designers of 18 karat jewelry are more professional than those of 14 karat gold jewelry which makes these designs less available to the rest of the public.