Price per carat

Santa Maria Blue Aquamarine 23.09ct

Aquamarine price per carat

What aquamarine actually sells for, worked out from the 1425 stones in our stock. Every figure is a real stone you can buy, not a market estimate.

At a glance

01

Aquamarine more than 10 ct · $74 per carat

Typical price
$83 per carat
Most stones
$51–$158 per carat
Based on
1425 stones in stock
Updated
19 October 2026

Aquamarine price by carat size

02

In our stock, larger aquamarine costs less per carat — size is plentiful, so colour and clarity drive the price more.

Carat sizeTypical / ctMost stones / ctIn stock
Less than 4 ct$104$64–$158385 stones
4–6 ct$79$54–$111298 stones
6–10 ct$72$51–$89344 stones
More than 10 ct$74$55–$109398 stones

“Most stones” is the middle half of our stock in that size, so one exceptional stone cannot skew it.

What moves the price

03

Two stones of the same weight can differ several times in price. Colour comes first, its saturation and evenness, then clarity, the quality of the cut, origin and treatment. Every listing states each of these, so you can compare like with like.

Read the aquamarine guide →

From our stock

04

Common questions

05

How much does aquamarine cost per carat?

+

Across the 1425 aquamarine stones in our stock, the typical price is around $83 per carat, with most stones between $51 and $158 per carat. Colour, clarity, cut and size move a stone within that range.

How much is an aquamarine under 4 ct?

+

Aquamarine of under 4 ct in our stock is typically $104 per carat; the middle half of the 385 stones we hold sit between $64 and $158 per carat.

How much is a 4–6 ct aquamarine?

+

Aquamarine of 4–6 ct in our stock is typically $79 per carat; the middle half of the 298 stones we hold sit between $54 and $111 per carat.

How much is a 6–10 ct aquamarine?

+

Aquamarine of 6–10 ct in our stock is typically $72 per carat; the middle half of the 344 stones we hold sit between $51 and $89 per carat.

How much is an aquamarine over 10 ct?

+

Aquamarine of over 10 ct in our stock is typically $74 per carat; the middle half of the 398 stones we hold sit between $55 and $109 per carat.

From the journal

06