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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 HK$2,393 HKD
$305 USD
As of October 29, 2026
Save HK$2,462 HKD (51%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: HK$9,164 HKD 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: HK$9,164 HKD|Low: HK$2,393 HKD|High: HK$9,823 HKD|Avg: HK$4,469 HKD|-6.7%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 7HK$2,393 HKD
Retailer 6HK$2,668 HKD
Retailer 9HK$3,413 HKD
Retailer 3HK$3,413 HKD
Retailer 8HK$3,601 HKD
Retailer 2HK$4,160 HKD
Retailer 4HK$4,855 HKD
Retailer 5HK$5,530 HKD
NZ JewellersHK$9,164 HKD

38 data points across 9 retailers

9 retailersHK$2,393 HKD to HK$4,855 HKD

A
Cheapest Retailer
-
HK$2,393 HKD
$305 USD
A
Retailer 2
-
HK$2,668 HKD
$340 USD
View
B+
Retailer 3
-
HK$3,413 HKD
$435 USD
View
B+
Retailer 4
-
HK$3,413 HKD
$435 USD
View
B+
Retailer 5
-
HK$3,601 HKD
$459 USD
View
B
Retailer 6
-
HK$4,160 HKD
€505 EUR
View
B
Retailer 7
-
HK$4,855 HKD
£487 GBP
View
Retailer 8
-
HK$5,530 HKD
£555 GBP
View
Price last confirmed 8 days ago
Most Expensive
NZ Jewellers
3550a96d-9dd8-45ae-bf61-3e8d29e63267 · Oct 30
HK$9,164 HKD
$1,168 USD
View
Price under review
8 more retailers have this diamond
Prices start from HK$2,393 HKDSave up to HK$2,462 HKD

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
HK$2,393 HKD