Round|Natural|GIA

2.51ct F SI1 Round Natural Diamond

EX • F/SI1

Diamond specifications and retailer prices

From €22,612 EUR
$25,362 USD
As of November 2, 2026
Save €8,117 EUR (26%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: €30,729 EUR at The Diamond Guys · As of October 23, 2026
View at The Diamond Guys

About this 2.51ct natural round diamond

This 2.51ct natural round sits in the two to three carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA. Listed at 25 retailers as of November 2, 2026, with a 36% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

2.51
Carat
F
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
Dimensions8.59 × 8.62 × 5.45 mm
L/W Ratio1.00
Top View
8.59 mm8.62 mm2.51 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA
Side View
Table 56.0%CrownGirdle: MediumPavilionCulet: NoneDepth 63.4%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: €28,259 EUR|Low: €22,401 EUR|High: €30,729 EUR|Avg: €27,095 EUR|-0.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
The Diamond Guys
November 2, 2026
Retailer 2€22,612 EUR
Retailer 6€24,780 EUR
Retailer 8€25,622 EUR
Retailer 10€26,084 EUR
Retailer 4€26,689 EUR
Retailer 9€26,903 EUR
Retailer 7€27,758 EUR
Retailer 1€28,259 EUR
Retailer 3€28,610 EUR
Retailer 5€28,825 EUR
The Diamond Guys€30,729 EUR

40 data points across 11 retailers

25 retailers€22,612 EUR to €30,729 EUR

B+
Cheapest Retailer
-
€22,612 EUR
$25,362 USD
B+
Retailer 2
-
€24,780 EUR
CA$38,602 CAD
View
Retailer 3
-
€25,622 EUR
$28,738 USD
View
Price last confirmed 21 days ago
Retailer 4
-
€25,622 EUR
$28,738 USD
View
Price last confirmed 17 days ago
B+
Retailer 5
-
€25,622 EUR
$28,738 USD
View
B
Retailer 6
-
€26,084 EUR
$29,256 USD
View
B
Retailer 7
-
€26,689 EUR
$29,935 USD
View
Retailer 8
-
€26,689 EUR
$29,935 USD
View
Price last confirmed 22 days ago
Retailer 9
-
€26,689 EUR
$29,935 USD
View
Price last confirmed 30 days ago
Retailer 10
-
€26,689 EUR
$29,935 USD
View
Price last confirmed 24 days ago
Retailer 11
-
€26,689 EUR
$29,935 USD
View
Price last confirmed 13 days ago
Retailer 12
-
€26,903 EUR
$30,175 USD
View
Price last confirmed 11 days ago
B
Retailer 13
-
€26,903 EUR
$30,175 USD
View
B
Retailer 14
-
€27,758 EUR
$31,133 USD
View
Retailer 15
-
€27,758 EUR
$31,133 USD
View
Price last confirmed 23 days ago
Retailer 16
-
€27,758 EUR
$31,133 USD
View
Price last confirmed 11 days ago
B+
Retailer 17
-
€28,259 EUR
£24,957 GBP
View
B
Retailer 18
-
€28,610 EUR
$32,089 USD
View
Retailer 19
-
€28,825 EUR
$32,330 USD
View
Price last confirmed 31 days ago
B
Retailer 20
-
€28,825 EUR
$32,330 USD
View
Retailer 21
-
€28,825 EUR
$32,330 USD
View
Price last confirmed 21 days ago
Retailer 22
-
€28,825 EUR
$32,330 USD
View
Price last confirmed 12 days ago
Retailer 23
-
€28,825 EUR
$32,330 USD
View
Price last confirmed 24 days ago
B
Retailer 24
-
€30,729 EUR
$34,466 USD
View
Most Expensive
The Diamond Guys
1992909477 · Oct 23
€30,729 EUR
$34,466 USD
View
Price last confirmed 10 days ago
24 more retailers have this diamond
Prices start from €22,612 EURSave up to €8,117 EUR

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

B+
2.51ct Round
€22,612 EUR