Round|Natural|GIA

2.51ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 6552067400

Certificate GIA 6552067400

Diamond specifications and retailer prices

From $25,107 USD
As of October 30, 2026
Save $17,963 USD (42%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $43,070 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6552067400. Listed at 15 retailers as of October 30, 2026, with prices from $25,107 to $43,070, a $17,963 spread on the same certified stone. MOH London lists it at $43,070. 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
H
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33°
Pavilion angle41.8°
OriginNatural
Grading LabGIA
CertificateGIA 6552067400
Dimensions8.64 × 8.69 × 5.41 mm
L/W Ratio1.01
Star length50%
Top View
8.64 mm8.69 mm2.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6552067400
Side View
Table 58.0%Crown 33°Girdle: Slightly ThickPavilion 41.8°Culet: NoneDepth 62.4%

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: Oct 30
Current: $43,070 USD|Low: $25,107 USD|High: $43,588 USD|Avg: $31,037 USD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 1, 2026
Retailer 7$25,107 USD
Retailer 8$26,825 USD
Retailer 4$27,577 USD
Retailer 9$27,780 USD
Retailer 5$27,832 USD
Retailer 11$28,726 USD
Retailer 10$28,956 USD
Retailer 12$29,875 USD
Retailer 3$31,024 USD
Retailer 2$33,311 USD
Retailer 6$38,133 USD
MOH London$43,070 USD

40 data points across 12 retailers

15 retailers$25,107 USD to $43,070 USD

B+
Cheapest Retailer
-
$25,107 USD
B+
Retailer 2
-
$25,974 USD
CA$36,075 CAD
View
B+
Retailer 3
-
$26,825 USD
View
B+
Retailer 4
-
$27,577 USD
View
Retailer 5
-
$27,780 USD
A$42,738 AUD
View
Price last confirmed 28 days ago
B+
Retailer 6
-
$27,832 USD
£21,915 GBP
View
B
Retailer 7
-
$28,726 USD
View
B
Retailer 8
-
$28,956 USD
View
B
Retailer 9
-
$29,875 USD
View
B
Retailer 10
-
$30,259 USD
View
B
Retailer 11
-
$31,024 USD
View
B
Retailer 12
-
$32,210 USD
View
B
Retailer 13
-
$33,311 USD
€31,725 EUR
View
B
Retailer 14
-
$38,133 USD
ZAR 616,039 ZAR
View
Most Expensive
B
MOH London
84B63B2F4 · Nov 1
$43,070 USD
£33,913 GBP
View
14 more retailers have this diamond
Prices start from $25,107 USDSave up to $17,963 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
$25,107 USD