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Round|Natural|GIA

2.51ct G SI1 Round Natural Diamond

EX • G/SI1 • GIA 2566649853

Certificate GIA 2566649853

Diamond specifications and retailer prices

From $38,631 NZD
HK$170,100 HKD
As of November 1, 2026
Save $32,820 NZD (46%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $71,452 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 G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2566649853. Listed at 19 retailers as of November 1, 2026, with prices from $38,631 to $71,452, a $32,820 spread on the same certified stone. MOH London lists it at $71,452. 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
G
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle35.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 2566649853
Dimensions8.65 × 8.69 × 5.36 mm
L/W Ratio1.00
Culet sizeNone
Key to symbols
Crystal, Cloud, Feather, Needle
Top View
8.65 mm8.69 mm2.51 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 2566649853
Side View
Table 59.0%Crown 35.5°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 61.8%

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: Nov 1
Current: $71,452 NZD|Low: $38,563 NZD|High: $71,835 NZD|Avg: $50,052 NZD|-0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
November 2, 2026
Retailer 4$38,631 NZD
Retailer 8$39,036 NZD
Retailer 14$39,549 NZD
Retailer 3$41,093 NZD
Retailer 5$41,653 NZD
Retailer 11$43,364 NZD
Retailer 16$44,535 NZD
Retailer 17$45,750 NZD
Retailer 12$46,160 NZD
Retailer 6$47,658 NZD
Retailer 18$48,039 NZD
Retailer 19$49,563 NZD
Retailer 2$50,459 NZD
Retailer 7$51,471 NZD
Retailer 10$52,007 NZD
Retailer 13$55,264 NZD
Retailer 15$63,263 NZD
Retailer 9$63,891 NZD
MOH London$71,452 NZD

17 data points across 19 retailers

19 retailers$38,631 NZD to $71,452 NZD

A
Cheapest Retailer
-
$38,631 NZD
HK$170,100 HKD
Retailer 2
-
$39,036 NZD
₹2,095,301 INR
View
Price last confirmed 8 days ago
A
Retailer 3
-
$39,549 NZD
$22,290 USD
View
A
Retailer 4
-
$41,093 NZD
$23,160 USD
View
A
Retailer 5
-
$41,653 NZD
$23,476 USD
View
Retailer 6
-
$44,287 NZD
$24,960 USD
View
Price last confirmed 15 days ago
B+
Retailer 7
-
$44,535 NZD
$25,100 USD
View
B+
Retailer 8
-
$45,750 NZD
$25,785 USD
View
B+
Retailer 9
-
$46,160 NZD
£20,485 GBP
View
B+
Retailer 10
-
$47,658 NZD
$26,860 USD
View
B+
Retailer 11
-
$48,039 NZD
$27,075 USD
View
B+
Retailer 12
-
$49,563 NZD
$27,934 USD
View
B+
Retailer 13
-
$50,459 NZD
£22,393 GBP
View
B+
Retailer 14
-
$51,471 NZD
$29,009 USD
View
Retailer 15
-
$52,007 NZD
$29,311 USD
View
Price last confirmed 9 days ago
B
Retailer 16
-
$55,264 NZD
€29,664 EUR
View
B
Retailer 17
-
$63,263 NZD
ZAR 576,015 ZAR
View
Retailer 18
-
$63,891 NZD
$36,009 USD
View
Price last confirmed 7 days ago
Most Expensive
B
MOH London
6829E11F8 · Nov 1
$71,452 NZD
£31,709 GBP
View
18 more retailers have this diamond
Prices start from $38,631 NZDSave up to $32,820 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.

A
2.51ct Round
$38,631 NZD