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Round|Lab Grown|IGI

1.42ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG784658967

Shape and cutting style on the report: Round brilliant

Certificate IGI LG784658967

Diamond specifications and retailer prices

From £202 GBP
$270 USD
As of November 1, 2026
Save £313 GBP (61%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £703 GBP at MOH London · As of October 25, 2026
View at MOH London

About this 1.42ct lab-grown round diamond

This 1.42ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG784658967 or 784658967. Listed at 11 retailers as of October 31, 2026, with a 156% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.42
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.9°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG784658967
Dimensions7.17 × 7.12 × 4.40 mm
L/W Ratio1.01
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
7.17 mm7.12 mm1.42 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG784658967
Side View
Table 58.0%Crown 35.9°Girdle: MED-STKPavilion 40.2°Culet: NoneDepth 61.6%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 1
Current: £703 GBP|Low: £150 GBP|High: £711 GBP|Avg: £359 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 8£150 GBP
Retailer 10£202 GBP
Retailer 5£251 GBP
Retailer 2£265 GBP
Retailer 9£343 GBP
Retailer 3£348 GBP
Retailer 4£365 GBP
Retailer 6£414 GBP
Retailer 7£515 GBP
MOH London£703 GBP

42 data points across 10 retailers

11 retailers£202 GBP to £515 GBP

Retailer 1
-
£150 GBP
$201 USD
Price last confirmed 7 days ago
B+
Retailer 2
-
£202 GBP
$270 USD
View
A
Retailer 3
-
£251 GBP
€320 EUR
View
A
Retailer 4
-
£265 GBP
View
A
Retailer 5
-
£343 GBP
$460 USD
View
A
Retailer 6
-
£348 GBP
A$718 AUD
View
B+
Retailer 7
-
£365 GBP
$489 USD
View
B+
Retailer 8
-
£373 GBP
$500 USD
View
B+
Retailer 9
-
£414 GBP
$555 USD
View
B
Retailer 10
-
£515 GBP
$690 USD
View
Most Expensive
MOH London
LG784658967 · Oct 25
£703 GBP
View
Price last confirmed 8 days ago
10 more retailers have this diamond
Prices start from £202 GBPSave up to £313 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
1.42ct Round
£202 GBP