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Round|Natural|GIA

2.51ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 6525293492

Certificate GIA 6525293492

Diamond specifications and retailer prices

From $22,245 NZD
As of November 1, 2026
Save $15,906 NZD (42%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $38,151 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6525293492. Listed at 15 retailers as of November 1, 2026, with prices from $22,245 to $38,151, a $15,906 spread on the same certified stone. MOH London lists it at $38,151. 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
FluorescenceMedium
Crown angle36°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6525293492
Dimensions8.67 × 8.62 × 5.41 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Top View
8.67 mm8.62 mm2.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 6525293492
Side View
Table 55.0%Crown 36°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.6%

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: $38,151 NZD|Low: $22,245 NZD|High: $38,714 NZD|Avg: $28,712 NZD|-1.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 6$22,245 NZD
Retailer 7$22,724 NZD
Retailer 4$25,716 NZD
Retailer 8$26,666 NZD
Retailer 2$28,028 NZD
Retailer 5$30,622 NZD
Retailer 3$33,632 NZD
MOH London$38,151 NZD

36 data points across 8 retailers

15 retailers$22,245 NZD to $38,151 NZD

A
Cheapest Retailer
-
$22,245 NZD
A
Retailer 2
-
$22,724 NZD
View
B+
Retailer 3
-
$24,060 NZD
View
Retailer 4
-
$24,494 NZD
View
Price last confirmed 8 days ago
B+
Retailer 5
-
$25,716 NZD
View
B+
Retailer 6
-
$26,127 NZD
View
B+
Retailer 7
-
$26,534 NZD
View
B+
Retailer 8
-
$26,666 NZD
View
B+
Retailer 9
-
$26,778 NZD
View
B+
Retailer 10
-
$27,555 NZD
View
B+
Retailer 11
-
$28,028 NZD
View
B
Retailer 12
-
$30,622 NZD
View
B
Retailer 13
-
$33,632 NZD
View
B
Retailer 14
-
$34,699 NZD
View
Most Expensive
B
MOH London
C28A85AE2 · Nov 4
$38,151 NZD
£16,887 GBP
View
14 more retailers have this diamond
Prices start from $22,245 NZDSave up to $15,906 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
$22,245 NZD