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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 $49,782 NZD
$28,010 USD
As of November 1, 2026
Save $35,613 NZD (42%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $85,396 NZD 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 $49,782 to $85,396, a $35,613 spread on the same certified stone. MOH London lists it at $85,396. 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: $85,396 NZD|Low: $45,566 NZD|High: $86,425 NZD|Avg: $61,962 NZD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 2, 2026
Retailer 7$48,924 NZD
Retailer 5$50,123 NZD
Retailer 6$54,614 NZD
Retailer 2$55,209 NZD
Retailer 3$66,051 NZD
Retailer 4$75,609 NZD
MOH London$85,396 NZD

39 data points across 7 retailers

13 retailers$49,782 NZD to $85,396 NZD

B+
Cheapest Retailer
-
$49,782 NZD
$28,010 USD
B+
Retailer 2
-
$50,123 NZD
$28,202 USD
View
Final sale: no returns
Retailer 3
-
$54,614 NZD
A$47,275 AUD
View
Price last confirmed 29 days ago
B
Retailer 4
-
$54,679 NZD
$30,765 USD
View
B
Retailer 5
-
$55,209 NZD
£24,459 GBP
View
B
Retailer 6
-
$55,530 NZD
$31,244 USD
View
B
Retailer 7
-
$56,957 NZD
$32,047 USD
View
B
Retailer 8
-
$57,414 NZD
$32,304 USD
View
B
Retailer 9
-
$59,236 NZD
$33,329 USD
View
B
Retailer 10
-
$61,514 NZD
$34,611 USD
View
B
Retailer 11
-
$66,051 NZD
€35,394 EUR
View
B
Retailer 12
-
$75,609 NZD
ZAR 687,262 ZAR
View
Most Expensive
B
MOH London
F205D9262 · Nov 1
$85,396 NZD
£37,833 GBP
View
12 more retailers have this diamond
Prices start from $49,782 NZDSave up to $35,613 NZD

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
$49,782 NZD