Marquise|Natural|IGI

0.42ct H SI1 Marquise Natural Diamond

VG • H/SI1 • IGI 800672790

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 800672790

Diamond specifications and retailer prices

From £305 GBP
$409 USD
As of October 29, 2026
Save £402 GBP (57%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £707 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 0.42ct natural marquise diamond

This 0.42ct natural marquise sits in the sub-half-carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 800672790. Listed at 8 retailers as of October 29, 2026, with prices from £305 to £707, a £402 spread on the same certified stone. MOH London lists it at £707. 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

0.42
Carat
H
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle28.8°
Pavilion angle38°
OriginNatural
Grading LabIGI
CertificateIGI 800672790
Dimensions8.41 × 3.71 × 2.26 mm
L/W Ratio2.27
Girdle conditionFaceted
Top View
8.41 mm3.71 mm0.42 ctH / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI 800672790
Side View
Table 61.0%Crown 28.8°Girdle: MED-THKPavilion 38°Culet: NoneDepth 60.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: £707 GBP|Low: £393 GBP|High: £712 GBP|Avg: £499 GBP|+0.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
October 31, 2026
Retailer 5£393 GBP
Retailer 4£442 GBP
Retailer 3£443 GBP
Retailer 2£510 GBP
MOH London£707 GBP

17 data points across 5 retailers

8 retailers£305 GBP to £707 GBP

Retailer 1
-
£305 GBP
$409 USD
Price last confirmed 25 days ago
B+
Retailer 2
-
£305 GBP
$409 USD
View
Retailer 3
-
£328 GBP
$440 USD
View
Price last confirmed 32 days ago
B
Retailer 4
-
£442 GBP
$594 USD
View
B
Retailer 5
-
£443 GBP
$595 USD
View
B
Retailer 6
-
£510 GBP
€652 EUR
View
Most Expensive
B
MOH London
2B93BA6B8 · Oct 29
£707 GBP
View
6 more retailers have this diamond
Prices start from £305 GBPSave up to £402 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.

B+
0.42ct Marquise
£305 GBP