How Much is a 2.5 Carat Diamond?
Updated for 2025. Analysis of current market prices for Natural vs Lab Grown diamonds at the 2.5ct weight class.
The Short Answer
Natural Market: Expect to pay between $22,000 and $45,000 for a good quality 2.5 carat natural diamond.
Lab Grown Market: Expect to pay between $1,500 and $2,500 for a similar quality lab-grown stone.
*Prices are based on GIA/IGI certified stones with G-H Color and VS Clarity. ideal Cut.
Detailed Price Breakdown
When shopping for a 2.5 carat diamond, the price is heavily influenced by the "4Cs": Cut, Color, Clarity, and Carat. However, the origin (Natural vs. Lab) is the biggest price multiplier.
A 2.5 carat diamond looks substantial on any hand. It bridges the gap between the popular 2 carat and the exclusive 3 carat range.
Natural vs Lab Grown: The Price Visualized
Natural 2.5ct
Lab Grown 2.5ct
How Big is a 2.5 Carat Diamond?
Carat is a measure of weight, not visual size. However, for a standard round brilliant cut diamond, we can estimate the diameter.
A 2.5 carat diamond is approximately 8.8 millimeters across. This is a substantial size that will stand out noticeably on the hand.
Where to Buy a 2.5 Carat Diamond
We recommend buying online to save 30-40% compared to traditional brick-and-mortar stores. Here are our top rated retailers for 2.5ct stones.