FAQs about the treatment processes

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How does color enhancement work?
There are three different color enhancement processes used – Irradiation, HPHT & coating. See The Process for details.

Irradiation – The first step is irradiation. That process rearranges the diamond’s atomic structure in a way that activates its ‘color center.’ Then, the diamond is heated at high temperatures, or annealed. Together, this process can induce the diamond to give off brilliant colors. See more details here.

HPHT – The HPHT Process recreates the high pressure and high temperature conditions that existed naturally within the mantel of the earth during the formation of the diamond to allow different natural elements within the diamond to relax and display their natural color. See more details here.

Coating – Coated Diamonds are a result of a hi-tech coating process that results in a very thin film at the pavilion of the diamond which imparts the color to the rest of the diamond. See more details here.

What machinery is used for irradiation?
While diamonds were once treated using the cyclotron, we now use the more advanced electron accelerator. This is a far safer process, which results in no residual radiation being left in the diamond.
Is the color ‘added’ to COLORed DIAMONDS?
In irradiation and HPHT no color is actually added. It emerges through the activation of the diamond’s own color center – and it’s not something that’s artificially introduced into the diamond, like paint, oil or chemicals. In coating since the color is not generated from within the diamond it is the result of a film being imparted on the pavilion of the diamond some people might argue that color is ‘added’ to the diamonds.
Is the color permanent?
Yes. The color won’t fade over time, and COLORed DIAMONDS can be handled like any other diamond. The only thing that can affect an irradiated diamond is the type of extreme heat (450 C/ 850 F) usually found in the mantel of the Earth.

Coated diamonds are just as hardy and durable as all diamonds, unless exposed to the same extreme heat. The only difference is that the pavilion of a coated diamond shouldn’t be exposed to acids or abrasive materials.

Can any diamond turn any color?
No, all off-white diamonds have a certain color potential and can only turn a certain color. Our experienced sorters are trained to recognize the color potential of any off-white diamond immediately, so there is no guesswork involved in the process.
Why should I buy coated diamonds?
The irradiation and HPHT processes are capable of manufacturing most colors except true pink. These processes yield very few pink colors and even then most of them have purplish undertones. For this reason, the only practical way to create a true pink diamond in larger quantities is to use the coating process.
Are all COLORed DIAMONDS safe?
COLORed DIAMONDS are safe so long as their manufacturers follow proper safety procedures. But unless you know this for a fact, you should be cautious. Previously a group of improperly irradiated and illegally produced cat’s eye stones were found to contain unsafe levels of radiation. This cautionary tale does not discredit the process of irradiation, but illustrates how important it is to buy irradiated products from legitimate sources only.
How can I set my COLORed DIAMONDS?
COLORed DIAMONDS can be channel set, invisible set, bezel set, flush set and pave set. Irradiated diamonds and coated diamonds cannot be wax set, however, as that process involves very high temperatures. Coated diamonds cannot be tension set as the pavilion needs to be protected.
How can I check if my COLORed DIAMONDS are safe?
If you’re in the jewelry trade, you should always have a Geiger counter on hand to check not only COLORed DIAMONDS but other gemstones as well. In addition, most certified labs will test your gemstones for a small fee.
Can I clean my COLORed DIAMONDS?
HPHT and Irradiated diamonds can be cleaned just like any other diamond; by using water, steam, acid, an ultrasonic cleaner or a common jewelry cleaner. Coated diamonds can only be cleaned using water. Acids and ultrasonics should be avoided as they can damage the coating.
Our 20 years of experience has allowed us to create every color of the rainbow.

Yellow Diamonds | Blue Diamonds | Irradiated Pink Diamonds | Loose Colored Diamonds | Fancy Intense Yellow Diamond | Birthstones | Enhanced Diamonds | Canary Yellow Diamond

Green Diamonds | Black Diamonds | Chocolate Diamonds | Purple Diamonds | Pink Diamonds | Red Diamonds | Blue Diamonds Rings