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Marquise|Natural|IGI

1.51ct K SI1 Marquise Natural Diamond

EX • K/SI1 • IGI 803629208

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 803629208

Diamond specifications and retailer prices

From $3,764 SGD
As of November 6, 2026
Save $3,733 SGD (50%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $7,497 SGD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise 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 803629208. Listed at 15 retailers as of November 5, 2026, with prices from $3,764 to $7,497, a $3,733 spread on the same certified stone. NZ Jewellers lists it at $7,497. 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 angle34.8°
Pavilion angle41.2°
OriginNatural
Grading LabIGI
CertificateIGI 803629208
Dimensions11.92 × 5.91 × 3.73 mm
L/W Ratio2.02
Girdle conditionFaceted
Top View
11.92 mm5.91 mm1.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 803629208
Side View
Table 61.0%Crown 34.8°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 63.1%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: $7,497 SGD|Low: $3,764 SGD|High: $7,727 SGD|Avg: $5,010 SGD|-3.0%
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 2$3,764 SGD
Retailer 5$4,095 SGD
Retailer 8$4,113 SGD
Retailer 6$4,116 SGD
Retailer 14$4,159 SGD
Retailer 4$4,304 SGD
Retailer 9$4,423 SGD
Retailer 7$4,436 SGD
Retailer 10$4,439 SGD
Retailer 15$4,469 SGD
Retailer 3$4,738 SGD
Retailer 11$4,892 SGD
Retailer 12$5,252 SGD
Retailer 13$7,176 SGD
NZ Jewellers$7,497 SGD

30 data points across 15 retailers

15 retailers$3,764 SGD to $7,497 SGD

A
Cheapest Retailer
-
$3,764 SGD
A
Retailer 2
-
$4,095 SGD
View
A
Retailer 3
-
$4,113 SGD
View
A
Retailer 4
-
$4,116 SGD
View
B+
Retailer 5
-
$4,159 SGD
View
A
Retailer 6
-
$4,304 SGD
View
A
Retailer 7
-
$4,423 SGD
View
Retailer 8
-
$4,436 SGD
View
Price last confirmed 9 days ago
A
Retailer 9
-
$4,439 SGD
View
A
Retailer 10
-
$4,469 SGD
View
A
Retailer 11
-
$4,738 SGD
View
A
Retailer 12
-
$4,892 SGD
View
A
Retailer 13
-
$5,252 SGD
View
B+
Retailer 14
-
$7,176 SGD
View
Most Expensive
B+
NZ Jewellers
ca66ec14-a278-4bb1-b408-71a51fcce9b5 · Nov 5
$7,497 SGD
$5,850 USD
View
14 more retailers have this diamond
Prices start from $3,764 SGDSave up to $3,733 SGD

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 Marquise
$3,764 SGD