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Round|Natural|GIA

2.51ct K SI2 Round Natural Diamond

EX • K/SI2 • GIA 5546047512

Certificate GIA 5546047512

Diamond specifications and retailer prices

From $13,422 NZD
As of November 4, 2026
Save $10,401 NZD (44%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $25,349 NZD at NZ Jewellers · As of September 28, 2026
View at NZ Jewellers

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 5546047512. Listed at 14 retailers as of November 4, 2026, with a 77% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
OriginNatural
Grading LabGIA
CertificateGIA 5546047512
Dimensions8.60 × 8.65 × 5.41 mm
L/W Ratio1.01
Top View
8.60 mm8.65 mm2.51 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5546047512
Side View
Table 59.0%CrownGirdlePavilionCulet: NDepth 62.7%

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 4
Current: $15,738 NZD|Low: $13,422 NZD|High: $24,040 NZD|Avg: $17,529 NZD|-4.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 5$13,422 NZD
Retailer 7$13,448 NZD
Retailer 8$15,156 NZD
Retailer 6$15,275 NZD
Retailer 1$15,738 NZD
Retailer 4$17,229 NZD
Retailer 2$18,584 NZD
Retailer 9$20,020 NZD
Retailer 3$23,823 NZD

37 data points across 9 retailers

14 retailers$13,422 NZD to $23,823 NZD

A
Cheapest Retailer
-
$13,422 NZD
A
Retailer 2
-
$13,448 NZD
View
A
Retailer 3
-
$15,156 NZD
View
Retailer 4
-
$15,210 NZD
View
Price last confirmed 29 days ago
A
Retailer 5
-
$15,275 NZD
View
A
Retailer 6
-
$15,738 NZD
View
Retailer 7
-
$16,476 NZD
View
Price last confirmed 29 days ago
Retailer 8
-
$16,731 NZD
View
Price last confirmed 38 days ago
A
Retailer 9
-
$17,229 NZD
View
A
Retailer 10
-
$18,584 NZD
View
Retailer 11
-
$19,011 NZD
View
Price last confirmed 38 days ago
Retailer 12
-
$20,020 NZD
View
Price last confirmed 14 days ago
B+
Retailer 13
-
$23,823 NZD
View
Most Expensive
NZ Jewellers
29289aa4-f6d7-4c00-8cfe-0327b2998af7 · Sep 28
$25,349 NZD
$14,250 USD
View
Price last confirmed 39 days ago
13 more retailers have this diamond
Prices start from $13,422 NZDSave up to $10,401 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
$13,422 NZD