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0.42ct D SI2 Round Lab Grown Diamond

EX • D/SI2 • IGI LG492136012

Shape and cutting style on the report: Round brilliant

Certificate IGI LG492136012

Diamond specifications and retailer prices

From £181 GBP
As of November 5, 2026
Save £716 GBP (80%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £897 GBP at MOH London · As of November 5, 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 D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG492136012 or 492136012. Listed at 9 retailers as of November 5, 2026, with prices from £181 to £897, a £716 spread on the same certified stone. MOH London lists it at £897. 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

0.42
Carat
D
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.2°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG492136012
Dimensions4.85 × 4.87 × 2.93 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
4.85 mm4.87 mm0.42 ctD / SI2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG492136012
Side View
Table 57.5%Crown 32.2°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 60.4%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £897 GBP|Low: £174 GBP|High: £911 GBP|Avg: £388 GBP|-0.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 4£181 GBP
Retailer 3£193 GBP
Retailer 7£210 GBP
Retailer 5£224 GBP
Retailer 6£377 GBP
Retailer 2£425 GBP
Retailer 8£443 GBP
Retailer 9£470 GBP
MOH London£897 GBP

25 data points across 9 retailers

9 retailers£181 GBP to £897 GBP

A
Cheapest Retailer
-
£181 GBP
A
Retailer 2
-
£193 GBP
View
B+
Retailer 3
-
£210 GBP
View
Retailer 4
-
£224 GBP
View
Price last confirmed 12 days ago
B+
Retailer 5
-
£224 GBP
View
B
Retailer 6
-
£377 GBP
View
B
Retailer 7
-
£425 GBP
View
B
Retailer 8
-
£721 GBP
View
Most Expensive
B
MOH London
LG492136012 · Nov 5
£897 GBP
View
8 more retailers have this diamond
Prices start from £181 GBPSave up to £716 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
£181 GBP