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1.51ct K SI1 Round Natural Diamond

EX • K/SI1 • IGI 754512199

Shape and cutting style on the report: Round brilliant

Certificate IGI 754512199

Diamond specifications and retailer prices

From $3,821 NZD
As of November 6, 2026
Save $6,123 NZD (62%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $9,944 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 754512199. Listed at 19 retailers as of November 5, 2026, with prices from $3,821 to $9,944, a $6,123 spread on the same certified stone. NZ Jewellers lists it at $9,944. 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 angle36.7°
Pavilion angle40.5°
OriginNatural
Grading LabIGI
CertificateIGI 754512199
Dimensions7.17 × 7.23 × 4.57 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
7.17 mm7.23 mm1.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 754512199
Side View
Table 56.0%Crown 36.7°Girdle: Slightly ThickPavilion 40.5°Culet: NoneDepth 63.5%

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 6
Current: $3,821 NZD|Low: $3,821 NZD|High: $8,432 NZD|Avg: $5,225 NZD|-2.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 1$3,821 NZD
Retailer 9$4,091 NZD
Retailer 6$4,312 NZD
Retailer 2$4,687 NZD
Retailer 10$4,831 NZD
Retailer 3$5,093 NZD
Retailer 4$5,568 NZD
Retailer 5$5,805 NZD
Retailer 7$5,874 NZD
Retailer 8$8,311 NZD

33 data points across 10 retailers

19 retailers$3,821 NZD to $9,944 NZD

A
Cheapest Retailer
-
$3,821 NZD
A
Retailer 2
-
$4,091 NZD
View
A
Retailer 3
-
$4,259 NZD
View
A
Retailer 4
-
$4,312 NZD
View
B+
Retailer 5
-
$4,687 NZD
View
Retailer 6
-
$4,757 NZD
View
Price last confirmed 8 days ago
B+
Retailer 7
-
$4,757 NZD
View
A
Retailer 8
-
$4,831 NZD
View
B+
Retailer 9
-
$4,840 NZD
View
B+
Retailer 10
-
$4,940 NZD
View
B+
Retailer 11
-
$5,008 NZD
View
A
Retailer 12
-
$5,093 NZD
View
B+
Retailer 13
-
$5,488 NZD
View
A
Retailer 14
-
$5,568 NZD
View
A
Retailer 15
-
$5,805 NZD
View
A
Retailer 16
-
$5,874 NZD
View
B+
Retailer 17
-
$7,297 NZD
View
B+
Retailer 18
-
$8,311 NZD
View
Most Expensive
B
NZ Jewellers
506969c5-90e3-475c-97b0-c094ff3fa585 · Nov 5
$9,944 NZD
$5,590 USD
View
18 more retailers have this diamond
Prices start from $3,821 NZDSave up to $6,123 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
$3,821 NZD