How a 1.5 carat compares to a 1 carat
A 1.5 carat round is 7.3 to 7.4mm across, about a millimetre wider than a 1 carat. You notice that millimetre on a hand.
In October 2026 a natural 1.5 carat round (G, VS1) had a median price of $8,763, roughly 2.6 times the 1 carat median for 1.5 times the weight, because bigger rough is rarer. Lab-grown went from $350 to $613 over the same step. The per-carat table above follows both curves up to 3 carats.
Clarity and color at 1.5 carats
The table facet on a 1.5 carat stone is big enough that inclusions get easier to find, so look closely at any SI clarity stone before buying. Most VS2 stones still look clean. Color shows a bit more in elongated shapes, so an oval at the same grade can look slightly warmer than a round.