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Marquise|Natural|IGI

0.40ct I SI2 Marquise Natural Diamond

VG • I/SI2 • IGI 839660292

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 839660292

Diamond specifications and retailer prices

From £224 GBP
$301 USD
As of October 29, 2026
Save £297 GBP (57%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £1,016 GBP 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 very-good cut grade and certified by IGI 839660292. Listed at 8 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. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.40
Carat
I
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle35.3°
Pavilion angle38.7°
OriginNatural
Grading LabIGI
CertificateIGI 839660292
Dimensions7.57 × 3.86 × 2.29 mm
L/W Ratio1.96
Girdle conditionFaceted
Culet sizeNone
Top View
7.57 mm3.86 mm0.40 ctI / SI2
OriginNatural
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI 839660292
Side View
Table 60.0%Crown 35.3°Girdle: MED-THKPavilion 38.7°Culet: NoneDepth 59.3%

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: £1,016 GBP|Low: £224 GBP|High: £1,016 GBP|Avg: £424 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 2, 2026
Retailer 6£224 GBP
Retailer 5£250 GBP
Retailer 8£317 GBP
Retailer 7£340 GBP
Retailer 2£388 GBP
Retailer 3£456 GBP
Retailer 4£521 GBP
NZ Jewellers£1,016 GBP

24 data points across 8 retailers

8 retailers£224 GBP to £521 GBP

A
Cheapest Retailer
-
£224 GBP
$301 USD
B+
Retailer 2
-
£250 GBP
$336 USD
View
B+
Retailer 3
-
£317 GBP
$425 USD
View
B
Retailer 4
-
£340 GBP
$456 USD
View
B
Retailer 5
-
£388 GBP
€496 EUR
View
B
Retailer 6
-
£456 GBP
View
B
Retailer 7
-
£521 GBP
View
Most Expensive
NZ Jewellers
ea1b4425-9cce-4bb9-a94a-5b040745bd7d · Oct 30
£1,016 GBP
$1,364 USD
View
Price under review
7 more retailers have this diamond
Prices start from £224 GBPSave up to £297 GBP

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
£224 GBP