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Marquise|Natural|IGI

0.40ct I SI1 Marquise Natural Diamond

VG • I/SI1 • IGI 815673826

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 815673826

Diamond specifications and retailer prices

From £213 GBP
₹27,246 INR
As of November 2, 2026
Save £462 GBP (68%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £675 GBP at MOH London · As of November 1, 2026
View at MOH London

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 very-good cut grade and certified by IGI 815673826. Listed at 13 retailers as of November 1, 2026, with prices from £213 to £675, a £462 spread on the same certified stone. MOH London lists it at £675. 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
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryGood
FluorescenceNone
Crown angle33.6°
Pavilion angle39.1°
OriginNatural
Grading LabIGI
CertificateIGI 815673826
Dimensions7.38 × 4.08 × 2.30 mm
L/W Ratio1.81
Girdle conditionFaceted
Top View
7.38 mm4.08 mm0.40 ctI / SI1
OriginNatural
CutVery Good
PolishVery Good
SymmetryGood
FluorescenceNone
CertificateIGI 815673826
Side View
Table 65.0%Crown 33.6°Girdle: MED-THKPavilion 39.1°Culet: NoneDepth 56.4%

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: Nov 2
Current: £675 GBP|Low: £213 GBP|High: £1,119 GBP|Avg: £459 GBP|-4.6%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 2, 2026
Retailer 2£213 GBP
Retailer 13£292 GBP
Retailer 11£314 GBP
Retailer 12£314 GBP
Retailer 9£335 GBP
Retailer 14£337 GBP
Retailer 5£390 GBP
Retailer 8£395 GBP
Retailer 4£417 GBP
Retailer 10£453 GBP
Retailer 7£484 GBP
Retailer 6£598 GBP
MOH London£675 GBP
Retailer 3£1,119 GBP

35 data points across 14 retailers

13 retailers£213 GBP to £675 GBP

A
Cheapest Retailer
-
£213 GBP
₹27,246 INR
B+
Retailer 2
-
£292 GBP
$392 USD
View
B+
Retailer 3
-
£314 GBP
$422 USD
View
B+
Retailer 4
-
£314 GBP
$422 USD
View
B
Retailer 5
-
£335 GBP
$450 USD
View
B
Retailer 6
-
£337 GBP
$452 USD
View
B
Retailer 7
-
£390 GBP
$523 USD
View
B
Retailer 8
-
£395 GBP
View
B
Retailer 9
-
£417 GBP
$559 USD
View
B
Retailer 10
-
£453 GBP
ZAR 9,816 ZAR
View
B
Retailer 11
-
£484 GBP
€618 EUR
View
Most Expensive
C
MOH London
DE12E4703 · Nov 1
£675 GBP
View
11 more retailers have this diamond
Prices start from £213 GBPSave up to £462 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
£213 GBP