Oval|Lab Grown|IGI

1.40ct F SI1 Oval Lab Grown Diamond

ID • F/SI1 • IGI LG791642114

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG791642114

Diamond specifications and retailer prices

From £363 GBP
A$748 AUD
As of November 2, 2026
7 retailers carry this diamond
Most expensive: £589 GBP at Rare Carat · As of September 9, 2026
View at Rare Carat

About this 1.4ct lab-grown oval diamond

This 1.4ct lab-grown oval sits in the one-and-a-quarter to one-and-a-half carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG791642114 or 791642114. Listed at 7 retailers as of November 2, 2026. 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

1.40
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.9°
Pavilion angle38.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG791642114
Dimensions9.41 × 6.26 × 3.70 mm
L/W Ratio1.50
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.41 mm6.26 mm1.40 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG791642114
Side View
Table 61.0%Crown 33.9°Girdle: STK-THKPavilion 38.9°Culet: NoneDepth 59.1%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 2
Current: £589 GBP|Low: £127 GBP|High: £743 GBP|Avg: £366 GBP
Rare Carat
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
Retailer 15
Retailer 16
October 31, 2026
Retailer 11£127 GBP
Retailer 3£147 GBP
Retailer 4£155 GBP
Retailer 14£157 GBP
Retailer 6£213 GBP
Retailer 9£265 GBP
Retailer 10£273 GBP
Retailer 15£349 GBP
Retailer 5£353 GBP
Retailer 2£363 GBP
Retailer 8£400 GBP
Retailer 13£505 GBP
Retailer 16£545 GBP
Rare Carat£589 GBP
Retailer 7£627 GBP
Retailer 12£743 GBP

10 data points across 16 retailers

7 retailers

Retailer 1
-
£127 GBP
$170 USD
Price last confirmed 34 days ago
Retailer 2
-
£147 GBP
$197 USD
View
Price last confirmed 38 days ago
Retailer 3
-
£155 GBP
$208 USD
View
Price last confirmed 33 days ago
Retailer 4
-
£353 GBP
$473 USD
View
Price last confirmed 32 days ago
B+
Retailer 5
-
£363 GBP
A$748 AUD
View
Retailer 6
-
£505 GBP
$676 USD
View
Price last confirmed 35 days ago
Most Expensive
Rare Carat
8K791642114 · Sep 9
£589 GBP
$789 USD
View
Price last confirmed 53 days ago
6 more retailers have this diamond
Prices start from £363 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+
1.40ct Oval
£363 GBP