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Round|Lab Grown|IGI

0.42ct G SI1 Round Lab Grown Diamond

VG • G/SI1 • IGI LG455034095

Shape and cutting style on the report: Round brilliant

Certificate IGI LG455034095

Diamond specifications and retailer prices

From £172 GBP
$231 USD
As of October 29, 2026
Save £689 GBP (80%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £862 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 0.42ct lab-grown round diamond

This 0.42ct lab-grown round sits in the sub-half-carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG455034095 or 455034095. Listed at 10 retailers as of October 29, 2026, with prices from £172 to £862, a £689 spread on the same certified stone. MOH London lists it at £862. 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
G
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle36.6°
Pavilion angle41.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG455034095
Dimensions4.68 × 4.64 × 3.05 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
4.68 mm4.64 mm0.42 ctG / SI1
OriginLab Grown
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG455034095
Side View
Table 57.5%Crown 36.6°Girdle: STK-THKPavilion 41.6°Culet: NoneDepth 65.4%

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: Oct 29
Current: £862 GBP|Low: £166 GBP|High: £867 GBP|Avg: £347 GBP|+0.6%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 31, 2026
Retailer 5£172 GBP
Retailer 3£187 GBP
Retailer 8£200 GBP
Retailer 6£213 GBP
Retailer 9£306 GBP
Retailer 7£363 GBP
Retailer 2£402 GBP
Retailer 4£412 GBP
MOH London£862 GBP

41 data points across 9 retailers

10 retailers£172 GBP to £862 GBP

B+
Cheapest Retailer
-
£172 GBP
$231 USD
A
Retailer 2
-
£187 GBP
$250 USD
View
B+
Retailer 3
-
£200 GBP
$268 USD
View
B+
Retailer 4
-
£213 GBP
$286 USD
View
B+
Retailer 5
-
£213 GBP
$286 USD
View
B
Retailer 6
-
£363 GBP
$486 USD
View
B
Retailer 7
-
£402 GBP
View
B
Retailer 8
-
£412 GBP
€526 EUR
View
B
Retailer 9
-
£687 GBP
$921 USD
View
Most Expensive
B
MOH London
LG455034095 · Oct 29
£862 GBP
View
9 more retailers have this diamond
Prices start from £172 GBPSave up to £689 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
0.42ct Round
£172 GBP