How Much is a 1.5 Carat Diamond?
Updated for 2025. Analysis of current market prices for Natural vs Lab Grown diamonds at the 1.5ct weight class.
The Short Answer
Natural Market: Expect to pay between $7,000 and $16,000 for a good quality 1.5 carat natural diamond.
Lab Grown Market: Expect to pay between $800 and $1,500 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 1.5 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 1.5 carat diamond is significantly larger than the average engagement ring stone. It makes a bold statement without the exponentially higher price tag of a 2 carat stone.
Natural vs Lab Grown: The Price Visualized
Natural 1.5ct
Lab Grown 1.5ct
How Big is a 1.5 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 1.5 carat diamond is approximately 7.4 millimeters across. This provides excellent finger coverage.
Where to Buy a 1.5 Carat Diamond
We recommend buying online to save 30-40% compared to traditional brick-and-mortar stores. Here are our top rated retailers for 1.5ct stones.