I like the concept of your project about Diamonds. There are actually 3 main types of diamonds. Natural diamonds (white and naturally colored ones), Treated diamonds (white diamonds treated which turn to be colored), Synthetic diamonds.

Natural diamonds
Natural diamonds are a miracle of nature that takes hundreds of millions of years to form. They are the hardest natural material on Earth, and they are excellent heat conductors and have many industrial uses.

Treated diamonds
Treated diamonds also called “enhanced diamond” are natural white diamonds which are treated to improve clarity or to alter color.

Synthetic diamonds
Synthetic diamonds are diamonds which are produced in an artificial process, as opposed to natural diamonds, which are created by geological processes. These diamonds are produced by scientist in laboratories.

What kind of diamond is being backed by your project?