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Marquise|Natural|IGI

0.40ct I SI2 Marquise Natural Diamond

EX • I/SI2 • IGI 823659617

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 823659617

Diamond specifications and retailer prices

From HK$2,362 HKD
$301 USD
As of October 29, 2026
Save HK$3,129 HKD (57%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: HK$10,702 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 SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI 823659617. Listed at 7 retailers as of October 29, 2026, with a 132% 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
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle34.5°
Pavilion angle40.9°
OriginNatural
Grading LabIGI
CertificateIGI 823659617
Dimensions7.34 × 3.96 × 2.46 mm
L/W Ratio1.85
Girdle conditionFaceted
Top View
7.34 mm3.96 mm0.40 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI 823659617
Side View
Table 61.0%Crown 34.5°Girdle: THN-STKPavilion 40.9°CuletDepth 62.1%

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$10,702 HKD|Low: HK$2,362 HKD|High: HK$10,702 HKD|Avg: HK$4,922 HKD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 2, 2026
Retailer 6HK$2,362 HKD
Retailer 5HK$2,636 HKD
Retailer 7HK$3,337 HKD
Retailer 2HK$4,086 HKD
Retailer 3HK$4,798 HKD
Retailer 4HK$5,490 HKD
NZ JewellersHK$10,702 HKD

37 data points across 7 retailers

7 retailersHK$2,362 HKD to HK$5,490 HKD

A
Cheapest Retailer
-
HK$2,362 HKD
$301 USD
A
Retailer 2
-
HK$2,636 HKD
$336 USD
View
B+
Retailer 3
-
HK$3,337 HKD
$425 USD
View
B
Retailer 4
-
HK$4,086 HKD
€496 EUR
View
B
Retailer 5
-
HK$4,798 HKD
£481 GBP
View
B
Retailer 6
-
HK$5,490 HKD
£551 GBP
View
Most Expensive
NZ Jewellers
c5fc5f80-381e-421a-aa91-75063eddb7e9 · Oct 30
HK$10,702 HKD
$1,364 USD
View
Price under review
6 more retailers have this diamond
Prices start from HK$2,362 HKDSave up to HK$3,129 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$2,362 HKD