Premium Lab-Grown Diamonds
Refined Brilliance

Lab-grown diamonds are diamonds grown in a controlled environment using HPHT or CVD techniques. They have essentially the same chemical composition, crystal structure, and optical properties as natural diamonds. The main differences lie in the formation process and time. They are generally difficult to reliably distinguish with the naked eye and require professional instrumentation. Further reading on GIA's comparison of lab-grown and natural diamonds is available.

RAGAZZA high-grade lab-grown round brilliant cut diamonds must have a GIA grading report and achieve a DAII™ score of 7.00 or higher. We combine 16 data analyses with expert physical examination, carefully examining proportions, brilliance, fire, and transparency, and eliminating undesirable brownish, greenish, and milky appearances found in colorless diamonds. See Our 11 Quality Standards for details.

The price of loose diamonds is primarily influenced by factors such as carat weight, color, clarity, cut, shape, and grading report; even diamonds of the same weight can vary significantly in quality and price. When purchasing a complete set of jewelry, it's also necessary to consider the metal, the diamond accents, and the setting technique, and to understand what is included in the quoted price. Refer to the lab-grown diamond pricing guide or check loose diamond prices based on your budget.

First, confirm that the report indicates it is a lab-grown diamond, then verify the report number, weight, dimensions, and quality information. GIA currently uses a Premium/Standard classification for colorless to near-colorless lab-grown diamonds ; IGI loose diamond reports provide 4C grading information. When reading, pay attention to the report version and grading method. When purchasing, compare the report information with the actual diamond's brilliance, fire, and transparency.

DAII™ is a diamond quality index developed by RAGAZZA, currently primarily used for round brilliant diamonds. It integrates 16 data points to help compare the proportions and quality differences of diamonds of the same grade. The score is used as a reference for diamond selection and should be considered in conjunction with certificates and physical observation. Fancy-shaped diamonds such as pear and oval diamonds must be evaluated according to their respective cutting characteristics. See the DAII™ model and scoring instructions for details.

First, select your favorite loose diamond on the diamond selection page and add it to your cart. Then, on the ring setting page , choose a style that matches the shape and size of the diamond. Select "without main diamond," metal, and ring size from the product options. After ordering, RAGAZZA will set the diamond into a complete ring for you.