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Round|Natural|GIA

2.51ct F SI1 Round Natural Diamond

EX • F/SI1 • GIA 6531090328

Certificate GIA 6531090328

Diamond specifications and retailer prices

From $26,164 USD
As of November 1, 2026
Save $18,718 USD (42%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: $44,882 USD at MOH London · As of November 1, 2026
View at MOH London

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 6531090328. Listed at 25 retailers as of November 1, 2026, with prices from $26,164 to $44,882, a $18,718 spread on the same certified stone. MOH London lists it at $44,882. 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
Crown angle36.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 6531090328
Dimensions8.62 × 8.59 × 5.45 mm
L/W Ratio1.00
Star length55%
Lower girdle80%
Top View
8.62 mm8.59 mm2.51 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6531090328
Side View
Table 56.0%Crown 36.5°Girdle: Sli. ThickPavilion 41°Culet: NoneDepth 63.4%

Caratlytics Score

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

Price History

Last verified: Nov 1
Current: $44,882 USD|Low: $26,147 USD|High: $45,362 USD|Avg: $31,595 USD|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 2$27,347 USD
Retailer 10$27,540 USD
Retailer 9$27,786 USD
Retailer 3$28,738 USD
Retailer 11$28,942 USD
Retailer 7$28,943 USD
Retailer 4$29,008 USD
Retailer 5$33,564 USD
Retailer 8$33,875 USD
Retailer 6$39,738 USD
MOH London$44,882 USD

34 data points across 11 retailers

25 retailers$26,164 USD to $44,882 USD

B+
Cheapest Retailer
-
$26,164 USD
B+
Retailer 2
-
$26,190 USD
View
B+
Retailer 3
-
$26,674 USD
View
B+
Retailer 4
-
$27,347 USD
₹2,604,516 INR
View
B+
Retailer 5
-
$27,540 USD
View
Final sale: no returns
B+
Retailer 6
-
$27,786 USD
View
B+
Retailer 7
-
$27,945 USD
View
Retailer 8
-
$28,942 USD
A$44,525 AUD
View
Price last confirmed 29 days ago
B+
Retailer 9
-
$28,943 USD
View
Retailer 10
-
$28,943 USD
View
Price last confirmed 28 days ago
B+
Retailer 11
-
$29,008 USD
£22,841 GBP
View
B+
Retailer 12
-
$29,366 USD
View
Retailer 13
-
$29,935 USD
View
Price last confirmed 35 days ago
Retailer 14
-
$30,175 USD
View
Price last confirmed 34 days ago
B
Retailer 15
-
$30,210 USD
View
B
Retailer 16
-
$30,210 USD
View
B
Retailer 17
-
$30,723 USD
View
Retailer 18
-
$31,133 USD
View
Price last confirmed 34 days ago
Retailer 19
-
$31,133 USD
View
Price last confirmed 32 days ago
B
Retailer 20
-
$31,220 USD
View
Retailer 21
-
$32,330 USD
View
Price last confirmed 34 days ago
B+
Retailer 22
-
$33,564 USD
€31,966 EUR
View
B
Retailer 23
-
$33,875 USD
View
B
Retailer 24
-
$39,738 USD
ZAR 641,970 ZAR
View
Most Expensive
B
MOH London
2CCB9361E · Nov 1
$44,882 USD
£35,340 GBP
View
24 more retailers have this diamond
Prices start from $26,164 USDSave up to $18,718 USD

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
$26,164 USD