The main difference between non-treated and treated lab-grown diamonds is that non-treated diamonds have not undergone any additional treatments or enhancements, such diamonds are usually called “as grown”, while treated diamonds have undergone one or more additional processes that alter their physical and chemical characteristics.
Non-treated HPHT lab-grown diamonds are created using a high-pressure, high-temperature process and have not undergone any additional treatments or enhancements. Treated lab-grown diamonds, on the other hand, have undergone additional processes that alter their chemical characteristics, most commonly to enhance the color of the diamond.
There are two methods of creating lab grown diamonds CVD and HPHT, both have their pro’s and con’s. with HPHT diamonds we are able to achieve high grade colors from D to E, while with CVD method the most commonly seen are F-H. It’s widely accepted that In order to enhance the color of CVD diamonds they are placed inside the HPHT machine for a short period of time to alter the color of the diamond, it doesn’t harm the diamond structure nor it’s physical appearance, it only adjust the color, making it more colorless. Both as grown and treated lab grown diamonds are diamonds, both are certified accordingly in the most reputable gemological labs, such as IGI (International Gemological Institute), GIA (Gemological institute of America) or GCAL (Gem certification and assurance lab), there are other gemological labs that certify diamonds, but the three mentioned are the most widely known and used.
Whether to purchase an “as grown” or treated diamond depends on the desired color of your lab grown diamond, if you are looking for an D or E color then HPHT diamond is your choice and if you are aiming at F-H color of the diamond then the CVD method would be most common choice and a much wider selection to choose from.
At the end, a lab grown diamond is a choice, which we are happy to assist with!