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Round|Natural|GIA

2.51ct K SI2 Round Natural Diamond

EX • K/SI2 • GIA 2556787346

Certificate GIA 2556787346

Diamond specifications and retailer prices

From $20,299 NZD
As of November 4, 2026
Save $15,654 NZD (44%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $35,953 NZD at MOH London · As of November 4, 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 K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2556787346. Listed at 10 retailers as of November 4, 2026, with prices from $20,299 to $35,953, a $15,654 spread on the same certified stone. MOH London lists it at $35,953. 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
K
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 2556787346
Dimensions8.60 × 5.41 × 5.41 mm
L/W Ratio1.59
Culet sizeNone
Top View
8.60 mm5.41 mm2.51 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2556787346
Side View
Table 56.0%Crown 36.5°Girdle: THN-STKPavilion 40.6°Culet: NoneDepth 62.6%

Caratlytics Score

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

Price History

Last verified: Nov 4
Current: $35,953 NZD|Low: $19,386 NZD|High: $36,484 NZD|Avg: $24,581 NZD|-1.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 3$19,386 NZD
Retailer 5$20,299 NZD
Retailer 11$20,858 NZD
Retailer 9$21,418 NZD
Retailer 8$23,083 NZD
Retailer 2$24,222 NZD
Retailer 7$24,728 NZD
Retailer 10$25,006 NZD
Retailer 6$27,607 NZD
Retailer 4$27,756 NZD
MOH London$35,953 NZD

33 data points across 11 retailers

10 retailers$20,299 NZD to $35,953 NZD

A
Cheapest Retailer
-
$20,299 NZD
A
Retailer 2
-
$21,418 NZD
View
Retailer 3
-
$23,083 NZD
View
Price last confirmed 8 days ago
B+
Retailer 4
-
$24,020 NZD
View
B+
Retailer 5
-
$24,222 NZD
View
B+
Retailer 6
-
$24,728 NZD
View
B+
Retailer 7
-
$25,006 NZD
View
B+
Retailer 8
-
$27,607 NZD
View
B+
Retailer 9
-
$27,756 NZD
View
Most Expensive
B
MOH London
44FDDC741 · Nov 4
$35,953 NZD
£15,914 GBP
View
9 more retailers have this diamond
Prices start from $20,299 NZDSave up to $15,654 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
$20,299 NZD