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Marquise|Natural|IGI

1.51ct I SI2 Marquise Natural Diamond

EX • I/SI2 • IGI 803677043

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 803677043

Diamond specifications and retailer prices

From $2,356 SGD
As of October 31, 2026
Save $2,445 SGD (51%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $4,801 SGD at Wholesale Diamonds Direct · As of October 27, 2026
View at Wholesale Diamonds Direct

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI 803677043. Listed at 6 retailers as of October 27, 2026, with prices from $2,356 to $4,801, a $2,445 spread on the same certified stone. Wholesale Diamonds Direct lists it at $4,801. 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
I
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle38.7°
Pavilion angle41.7°
OriginNatural
Grading LabIGI
CertificateIGI 803677043
Dimensions11.59 × 5.90 × 3.81 mm
L/W Ratio1.96
Girdle conditionFaceted
Top View
11.59 mm5.90 mm1.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 803677043
Side View
Table 59.0%Crown 38.7°Girdle: THN-STKPavilion 41.7°Culet: NoneDepth 64.6%

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: Oct 31
Current: $2,787 SGD|Low: $2,333 SGD|High: $5,573 SGD|Avg: $3,502 SGD|-15.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Wholesale Diamonds Direct
October 28, 2026
Retailer 7$2,333 SGD
Retailer 3$2,356 SGD
Retailer 2$2,778 SGD
Retailer 1$2,787 SGD
Retailer 4$3,497 SGD
Retailer 6$3,614 SGD
Retailer 5$4,559 SGD
Wholesale Diamonds Direct$4,801 SGD

29 data points across 8 retailers

6 retailers$2,356 SGD to $4,801 SGD

A
Cheapest Retailer
-
$2,356 SGD
A
Retailer 2
-
$2,778 SGD
$2,173 USD
View
A
Retailer 3
-
$2,787 SGD
$2,180 USD
View
A
Retailer 4
-
$3,497 SGD
$2,736 USD
View
B+
Retailer 5
-
$3,614 SGD
$2,827 USD
View
Most Expensive
A
Wholesale Diamonds Direct
262936345 · Oct 27
$4,801 SGD
$3,755 USD
View
5 more retailers have this diamond
Prices start from $2,356 SGDSave up to $2,445 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
$2,356 SGD