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Round|Natural|IGI

1.51ct K SI2 Round Natural Diamond

EX • K/SI2 • IGI 717555550

Shape and cutting style on the report: Round brilliant

Certificate IGI 717555550

Diamond specifications and retailer prices

From $1,919 NZD
As of November 6, 2026
Save $2,387 NZD (55%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $5,751 NZD at NZ Jewellers · As of September 28, 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 717555550. Listed at 11 retailers as of November 4, 2026, with a 124% 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

1.51
Carat
K
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.4°
Pavilion angle40.7°
OriginNatural
Grading LabIGI
CertificateIGI 717555550
Dimensions7.27 × 7.22 × 4.60 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
7.27 mm7.22 mm1.51 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 717555550
Side View
Table 56.0%Crown 36.4°Girdle: MED-STKPavilion 40.7°Culet: NoneDepth 63.5%

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: $1,919 NZD|Low: $1,919 NZD|High: $4,371 NZD|Avg: $2,773 NZD|-1.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 1$1,919 NZD
Retailer 4$2,185 NZD
Retailer 6$2,358 NZD
Retailer 5$2,601 NZD
Retailer 2$3,112 NZD
Retailer 3$4,306 NZD

42 data points across 6 retailers

11 retailers$1,919 NZD to $4,306 NZD

A
Cheapest Retailer
-
$1,919 NZD
A
Retailer 2
-
$2,185 NZD
View
Retailer 3
-
$2,358 NZD
View
Price last confirmed 39 days ago
Retailer 4
-
$2,358 NZD
View
Price last confirmed 25 days ago
Retailer 5
-
$2,358 NZD
View
Price last confirmed 29 days ago
Retailer 6
-
$2,466 NZD
View
Price last confirmed 38 days ago
A
Retailer 7
-
$2,601 NZD
View
Retailer 8
-
$2,720 NZD
View
Price last confirmed 38 days ago
A
Retailer 9
-
$3,112 NZD
View
A
Retailer 10
-
$4,306 NZD
View
Most Expensive
NZ Jewellers
593dcbd2-02db-43f1-9a03-0e5bf40204e8 · Sep 28
$5,751 NZD
$3,188 USD
View
Price last confirmed 39 days ago
10 more retailers have this diamond
Prices start from $1,919 NZDSave up to $2,387 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
$1,919 NZD