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Round|Natural|IGI

1.51ct K SI2 Round Natural Diamond

EX • K/SI2 • IGI 648418562

Shape and cutting style on the report: Round brilliant

Certificate IGI 648418562

Diamond specifications and retailer prices

From $3,455 NZD
As of November 6, 2026
Save $6,676 NZD (66%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $10,131 NZD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI 648418562. Listed at 13 retailers as of November 5, 2026, with prices from $3,455 to $10,131, a $6,676 spread on the same certified stone. NZ Jewellers lists it at $10,131. 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

1.51
Carat
K
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.4°
Pavilion angle40.8°
OriginNatural
Grading LabIGI
CertificateIGI 648418562
Dimensions7.47 × 7.42 × 4.46 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
IDEAL CUT ROUND BRILLIANT
Top View
7.47 mm7.42 mm1.51 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 648418562
Side View
Table 58.0%Crown 33.4°Girdle: MediumPavilion 40.8°Culet: NoneDepth 60.0%

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 6
Current: $3,455 NZD|Low: $3,455 NZD|High: $8,590 NZD|Avg: $5,248 NZD|-2.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 1$3,455 NZD
Retailer 6$4,339 NZD
Retailer 5$4,406 NZD
Retailer 7$4,421 NZD
Retailer 3$5,319 NZD
Retailer 2$6,395 NZD
Retailer 4$8,466 NZD

38 data points across 7 retailers

13 retailers$3,455 NZD to $10,131 NZD

A
Cheapest Retailer
-
$3,455 NZD
B+
Retailer 2
-
$4,339 NZD
View
A
Retailer 3
-
$4,406 NZD
View
B+
Retailer 4
-
$4,421 NZD
View
B+
Retailer 5
-
$4,846 NZD
View
Retailer 6
-
$4,846 NZD
View
Price last confirmed 8 days ago
B+
Retailer 7
-
$5,033 NZD
View
B+
Retailer 8
-
$5,097 NZD
View
A
Retailer 9
-
$5,319 NZD
View
B+
Retailer 10
-
$5,591 NZD
View
B+
Retailer 11
-
$6,395 NZD
View
B+
Retailer 12
-
$8,466 NZD
View
Most Expensive
B
NZ Jewellers
16172003-4e4c-4cee-b131-80db80be7fc9 · Nov 5
$10,131 NZD
$5,695 USD
View
12 more retailers have this diamond
Prices start from $3,455 NZDSave up to $6,676 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
1.51ct Round
$3,455 NZD