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Round|Natural|GIA

2.51ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 5516107542

Certificate GIA 5516107542

Diamond specifications and retailer prices

From $22,032 NZD
As of November 1, 2026
Save $16,711 NZD (43%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $38,743 NZD at MOH London · As of November 2, 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5516107542. Listed at 13 retailers as of November 1, 2026, with prices from $22,032 to $38,743, a $16,711 spread on the same certified stone. MOH London lists it at $38,743. 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
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 5516107542
Dimensions8.71 × 8.67 × 5.41 mm
L/W Ratio1.00
Star length50%
Lower girdle80%
Top View
8.71 mm8.67 mm2.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5516107542
Side View
Table 56.0%Crown 35.5°Girdle: MediumPavilion 40.8°Culet: NoneDepth 62.3%

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: $38,743 NZD|Low: $22,032 NZD|High: $39,208 NZD|Avg: $30,826 NZD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 5$22,032 NZD
Retailer 3$26,048 NZD
Retailer 6$26,461 NZD
Retailer 4$31,052 NZD
Retailer 2$34,064 NZD
Retailer 7$35,144 NZD
MOH London$38,743 NZD

43 data points across 7 retailers

13 retailers$22,032 NZD to $38,743 NZD

A
Cheapest Retailer
-
$22,032 NZD
A
Retailer 2
-
$23,015 NZD
View
B+
Retailer 3
-
$24,362 NZD
View
Retailer 4
-
$24,807 NZD
View
Price last confirmed 8 days ago
B+
Retailer 5
-
$25,013 NZD
View
B+
Retailer 6
-
$26,048 NZD
View
B+
Retailer 7
-
$26,461 NZD
View
B+
Retailer 8
-
$26,874 NZD
View
B+
Retailer 9
-
$27,907 NZD
View
B
Retailer 10
-
$31,052 NZD
View
B
Retailer 11
-
$34,064 NZD
View
B
Retailer 12
-
$35,144 NZD
View
Most Expensive
B
MOH London
3665BC12E · Nov 2
$38,743 NZD
£17,149 GBP
View
12 more retailers have this diamond
Prices start from $22,032 NZDSave up to $16,711 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
$22,032 NZD