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Marquise|Natural|IGI

0.40ct I SI1 Marquise Natural Diamond

EX • I/SI1 • IGI 831665201

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 831665201

Diamond specifications and retailer prices

From $390 SGD
$305 USD
As of October 29, 2026
Save $401 SGD (51%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $1,493 SGD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 0.4ct natural marquise diamond

This 0.4ct natural marquise sits in the sub-half-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 831665201. Listed at 9 retailers as of October 29, 2026, with a 103% 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

0.40
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
Crown angle36°
Pavilion angle41.6°
OriginNatural
Grading LabIGI
CertificateIGI 831665201
Dimensions7.22 × 3.95 × 2.48 mm
L/W Ratio1.83
Girdle conditionFaceted
Culet sizeNone
Top View
7.22 mm3.95 mm0.40 ctI / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateIGI 831665201
Side View
Table 59.0%Crown 36°Girdle: THN-MEDPavilion 41.6°Culet: NoneDepth 62.8%

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: Oct 29
Current: $1,493 SGD|Low: $390 SGD|High: $1,601 SGD|Avg: $728 SGD|-6.7%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 7$390 SGD
Retailer 6$435 SGD
Retailer 9$556 SGD
Retailer 3$556 SGD
Retailer 8$587 SGD
Retailer 2$678 SGD
Retailer 4$791 SGD
Retailer 5$901 SGD
NZ Jewellers$1,493 SGD

38 data points across 9 retailers

9 retailers$390 SGD to $791 SGD

A
Cheapest Retailer
-
$390 SGD
$305 USD
A
Retailer 2
-
$435 SGD
$340 USD
View
B+
Retailer 3
-
$556 SGD
$435 USD
View
B+
Retailer 4
-
$556 SGD
$435 USD
View
B+
Retailer 5
-
$587 SGD
$459 USD
View
B
Retailer 6
-
$678 SGD
€505 EUR
View
B
Retailer 7
-
$791 SGD
£487 GBP
View
Retailer 8
-
$901 SGD
£555 GBP
View
Price last confirmed 8 days ago
Most Expensive
NZ Jewellers
3550a96d-9dd8-45ae-bf61-3e8d29e63267 · Oct 30
$1,493 SGD
$1,168 USD
View
Price under review
8 more retailers have this diamond
Prices start from $390 SGDSave up to $401 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
0.40ct Marquise
$390 SGD