The two main types of treatments used to color diamonds are HPHT and irradiated enhancements. HPHT (High Pressure High Temperature) color treatment involves applying temperatures of up to 3,700°F and the same atmospheric pressure to the diamond.
How can you tell if a diamond has been treated?
Because there is no way to see if a diamond has been treated, it is important to have a diamond grading report from an independent lab like GIA. As part of its grading process, GIA tests all diamonds for treatments; if the diamond is treated, it will be disclosed on the certificate.
Are Coloured diamonds natural?
Diamonds naturally come in every color of the rainbow (yep red, blue, green, purple, pink, etc.), as well as black, brown, gray, and white. … So, there are many different color diamonds! Some colors, such as red and blue, are much more rare than others. As a result of this rarity, these colors are much more expensive.
Are color treated diamonds worth less?
A color enhanced diamond has less value than a natural diamond because it underwent a treatment that isn’t natural.
How do they add color to diamonds?
Most naturally-coloured diamonds are created when trace elements interact with the carbon atoms during the diamond’s creation. The presence of chemical elements such as nitrogen, sulphur, and boron can colour diamonds in shades of yellow, green and blue.
Do colored diamonds fade?
Enhanced loose colored diamonds are created by heating or irradiating real colorless diamonds or by exposing real colorless diamonds to high pressure and high temperature (a process known as HPHT). Colored diamonds which have been enhanced through these methods will never fade and are completely safe to wear.
Is coating a diamond permanent?
The coating is fairly durable but not permanent. Coated diamonds can be damaged by heat and chemicals during jewelry repairs and polishing.
Do colored diamonds cost more?
The price per carat base line is in the tens of thousands of dollars and any improvement in attributes such as bigger size or stronger color intensity (intense or vivid) and the pricing goes up exponentially. So yes, these colored diamonds are more expensive than white diamonds.
What is the cheapest color of diamond?
To group the colors based on prices the relatively affordable colored diamonds are grey, brown and fancy yellow. Going to mid ranging prices it can be an intense and vivid yellow diamonds and orange diamonds. A group higher in prices are pink, purple, violet, green and blue diamonds.
What color diamonds are the most valuable?
When it comes to the most expensive diamond color, red diamonds stand above all colored diamonds. The bottom line is that red diamonds are incredibly rare. And pure fancy red diamonds even more so, as most red diamonds have color modifiers such as purple, orange and brown.
Do enhanced diamonds hold their value?
Do Clarity Enhanced Diamonds Hold their Value? Yes, clarity enhanced diamonds like all other diamonds hold their value according to normal price fluctuations of diamonds as well as taking into account current market values and conditions.
Can you tell the difference between F and G color diamonds?
Conclusion. Viewed with the naked eye, it’s virtually impossible to see any difference in color between a G color diamond and a diamond with a D, E or F color grade. Despite this, G color diamonds are anywhere from 10 to 25% cheaper than diamonds in the “colorless” range of the scale.
Are Blue Nile diamonds treated?
Blue Nile offers consumers only the highest quality, authentic gemstones. Our colored gemstones undergo rigorous internal inspections by our trained gemologists to ensure they meet our stringent quality standards. … Our white and fancy-color diamonds are not enhanced in any way, other than normal cutting and polishing.
Are colored diamonds man made?
Are Colored Diamonds Natural? Natural fancy color diamonds are completely authentic in every way. The colors were developed within the stones through nature and over millions of years formed into the rough stones found in the mines throughout the world.
Why are diamonds so highly valued?
The rarity, difficulties in mining, durability, cut, clarity, color, and carat of diamonds make them expensive and in demand. … Only 30% of the mined diamond stones match the standard gem quality that is required. It is this rarity of stone that makes them the world’s most expensive diamond.
Are colored diamonds heat treated?
Typically, enhanced color diamonds start out as nearly colorless diamonds in their raw state. They then undergo a color-enhancement process using irradiation or HPHT (high temperature, high pressure). Enhanced diamonds are more affordable than white diamonds.