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Round|Natural|IGI

1.51ct K SI1 Round Natural Diamond

EX • K/SI1 • IGI 623473316

Shape and cutting style on the report: Round brilliant

Certificate IGI 623473316

Diamond specifications and retailer prices

From $3,755 NZD
As of November 6, 2026
Save $4,938 NZD (57%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $8,693 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 623473316. Listed at 15 retailers as of November 5, 2026, with prices from $3,755 to $8,693, a $4,938 spread on the same certified stone. NZ Jewellers lists it at $8,693. 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
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.4°
Pavilion angle41.1°
OriginNatural
Grading LabIGI
CertificateIGI 623473316
Dimensions7.48 × 7.44 × 4.51 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
IDEAL CUT ROUND BRILLIANT
Top View
7.48 mm7.44 mm1.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 623473316
Side View
Table 58.0%Crown 33.4°Girdle: MediumPavilion 41.1°Culet: NoneDepth 60.5%

Caratlytics Score

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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: $8,693 NZD|Low: $3,755 NZD|High: $9,044 NZD|Avg: $4,943 NZD|-3.9%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 6, 2026
Retailer 7$3,755 NZD
Retailer 10$3,798 NZD
Retailer 3$3,954 NZD
Retailer 6$4,154 NZD
Retailer 4$4,157 NZD
Retailer 5$4,157 NZD
Retailer 13$4,349 NZD
Retailer 11$4,406 NZD
Retailer 2$4,527 NZD
Retailer 8$4,570 NZD
Retailer 14$4,798 NZD
Retailer 9$5,075 NZD
Retailer 12$5,173 NZD
Retailer 15$7,281 NZD
NZ Jewellers$8,693 NZD

22 data points across 15 retailers

15 retailers$3,755 NZD to $8,693 NZD

A
Cheapest Retailer
-
$3,755 NZD
A
Retailer 2
-
$3,798 NZD
View
A
Retailer 3
-
$3,954 NZD
View
A
Retailer 4
-
$4,154 NZD
View
Retailer 5
-
$4,157 NZD
View
Price last confirmed 8 days ago
A
Retailer 6
-
$4,157 NZD
View
A
Retailer 7
-
$4,349 NZD
View
A
Retailer 8
-
$4,406 NZD
View
A
Retailer 9
-
$4,527 NZD
View
A
Retailer 10
-
$4,570 NZD
View
A
Retailer 11
-
$4,798 NZD
View
A
Retailer 12
-
$5,075 NZD
View
A
Retailer 13
-
$5,173 NZD
View
B+
Retailer 14
-
$7,281 NZD
View
Most Expensive
B
NZ Jewellers
64f18f7e-053e-4677-856d-c596d1f2dd3e · Nov 5
$8,693 NZD
$4,887 USD
View
14 more retailers have this diamond
Prices start from $3,755 NZDSave up to $4,938 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
$3,755 NZD