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Round|Natural|GIA

2.51ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 6422459741

Certificate GIA 6422459741

Diamond specifications and retailer prices

From $39,875 AUD
$28,010 USD
As of November 1, 2026
Save $28,526 AUD (42%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $68,401 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6422459741. Listed at 13 retailers as of November 1, 2026, with prices from $39,875 to $68,401, a $28,526 spread on the same certified stone. MOH London lists it at $68,401. 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
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 6422459741
Dimensions8.71 × 8.74 × 5.38 mm
L/W Ratio1.00
Top View
8.71 mm8.74 mm2.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 6422459741
Side View
Table 58.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 61.7%

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 1
Current: $68,401 AUD|Low: $36,498 AUD|High: $69,225 AUD|Avg: $49,631 AUD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 2, 2026
Retailer 7$39,187 AUD
Retailer 5$40,148 AUD
Retailer 6$43,745 AUD
Retailer 2$44,222 AUD
Retailer 3$52,906 AUD
Retailer 4$60,562 AUD
MOH London$68,401 AUD

39 data points across 7 retailers

13 retailers$39,875 AUD to $68,401 AUD

B+
Cheapest Retailer
-
$39,875 AUD
$28,010 USD
B+
Retailer 2
-
$40,148 AUD
$28,202 USD
View
Final sale: no returns
Retailer 3
-
$43,745 AUD
View
Price last confirmed 29 days ago
B
Retailer 4
-
$43,797 AUD
$30,765 USD
View
B
Retailer 5
-
$44,222 AUD
£24,459 GBP
View
B
Retailer 6
-
$44,479 AUD
$31,244 USD
View
B
Retailer 7
-
$45,622 AUD
$32,047 USD
View
B
Retailer 8
-
$45,988 AUD
$32,304 USD
View
B
Retailer 9
-
$47,447 AUD
$33,329 USD
View
B
Retailer 10
-
$49,272 AUD
$34,611 USD
View
B
Retailer 11
-
$52,906 AUD
€35,394 EUR
View
B
Retailer 12
-
$60,562 AUD
ZAR 687,262 ZAR
View
Most Expensive
B
MOH London
F205D9262 · Nov 1
$68,401 AUD
£37,833 GBP
View
12 more retailers have this diamond
Prices start from $39,875 AUDSave up to $28,526 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.

B+
2.51ct Round
$39,875 AUD