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Round|Natural|GIA

2.51ct H SI2 Round Natural Diamond

EX • H/SI2 • GIA 1539231448

Certificate GIA 1539231448

Diamond specifications and retailer prices

From $27,997 AUD
$19,621 USD
As of October 31, 2026
Save $23,428 AUD (46%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $51,426 AUD 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 SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1539231448. Listed at 11 retailers as of October 31, 2026, with prices from $27,997 to $51,426, a $23,428 spread on the same certified stone. MOH London lists it at $51,426. 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
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 1539231448
Dimensions8.61 × 8.65 × 5.42 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizeNone
Cert comments
Additional twinning wisps, additional clouds, pinpoints and surface graining are not shown.
Top View
8.61 mm8.65 mm2.51 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1539231448
Side View
Table 56.0%Crown 36.5°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.8%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: $51,426 AUD|Low: $27,997 AUD|High: $52,045 AUD|Avg: $37,068 AUD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 7$27,997 AUD
Retailer 4$32,090 AUD
Retailer 2$32,928 AUD
Retailer 6$33,108 AUD
Retailer 8$33,906 AUD
Retailer 9$38,345 AUD
Retailer 5$39,224 AUD
Retailer 3$39,775 AUD
MOH London$51,426 AUD

43 data points across 9 retailers

11 retailers$27,997 AUD to $51,426 AUD

A
Cheapest Retailer
-
$27,997 AUD
$19,621 USD
B+
Retailer 2
-
$30,620 AUD
$21,459 USD
View
B+
Retailer 3
-
$32,090 AUD
$22,489 USD
View
B+
Retailer 4
-
$32,928 AUD
£18,171 GBP
View
B+
Retailer 5
-
$33,108 AUD
$23,203 USD
View
B+
Retailer 6
-
$33,906 AUD
$23,762 USD
View
Retailer 7
-
$38,345 AUD
£21,160 GBP
View
Price last confirmed 33 days ago
B+
Retailer 8
-
$39,224 AUD
$27,489 USD
View
B
Retailer 9
-
$39,775 AUD
€26,548 EUR
View
B
Retailer 10
-
$46,648 AUD
$32,692 USD
View
Most Expensive
B
MOH London
82FF63EEA · Nov 1
$51,426 AUD
£28,378 GBP
View
10 more retailers have this diamond
Prices start from $27,997 AUDSave up to $23,428 AUD

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.

A
2.51ct Round
$27,997 AUD