3 Carat Round Cut Platinum Lab Diamond Ring+ 3.0-Carat Hearts and Arrows Lab Created Diamond

Lab diamonds are grown using two methods: HPHT (High Pressure High Temperature), which replicates the conditions deep in the earth, and CVD (Chemical Vapor Deposition), which builds the diamond carbon layer by layer from a gas. Both produce diamonds that are physically and chemically identical to mined stones.

No. Platinum is naturally white and does not require rhodium plating. Its color is permanent and consistent throughout the metal, so it never develops a yellowish tinge the way white gold can when its plating wears. For white gold options, Do Amore offers free rhodium replating as part of their maintenance services. This makes platinum the lower-maintenance choice in the long run, even with its higher upfront cost.

A 3 carat stone is well above average and a great choice for someone who wants their ring to look expensive and elevated without crossing into the ostentatious territory you hit at 4-5 carats. A comparable lab-grown 3 carat stone can be found for $3,000 to $8,000 depending on quality grades. The price difference at this size is extraordinary, which is one of the most compelling reasons couples choose lab diamonds for larger center stones.

The round brilliant cut was engineered specifically to maximize light performance. Its 57 or 58 facets are positioned to reflect and refract light with maximum efficiency, producing the most consistent sparkle of any diamond or gemstone shape. Its symmetry also means it looks good from every angle, which is why it has been the dominant engagement ring choice for over a century. Three carats makes a bold statement. It is large enough to be unmistakable, yet still well within the range of tasteful, wearable jewelry.

Purchasing a 3ct round lab diamond in platinum from Do Amore is securing the finest expression of the most classic ring combination. Platinum's 95% purity and permanent white luster provide the ideal lifetime setting for the round brilliant's extraordinary light performance at 3 carats. This conflict-free lab diamond is chemically identical to a mined stone. Founded by Krish Himmatramka, Do Amore has funded clean water for over 22,000 people and handcrafts every ring in the US.