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Marquise|Lab Grown|IGI

1.40ct G VS1 Marquise Lab Grown Diamond

ID • G/VS1 • IGI LG508156143

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG508156143

Diamond specifications and retailer prices

From £696 GBP
As of November 4, 2026
Save £899 GBP (56%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £1,979 GBP at Friendly Diamonds · As of November 4, 2026
View at Friendly Diamonds

About this 1.4ct lab-grown marquise diamond

This 1.4ct lab-grown marquise sits in the one-and-a-quarter to one-and-a-half carat band, graded G colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG508156143 or 508156143. Listed at 15 retailers as of November 4, 2026, with a 129% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.40
Carat
G
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.4°
Pavilion angle39.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG508156143
Dimensions11.08 × 6.12 × 3.54 mm
L/W Ratio1.81
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
11.08 mm6.12 mm1.40 ctG / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG508156143
Side View
Table 66.0%Crown 33.4°Girdle: STK-THKPavilion 39.4°Culet: NoneDepth 57.8%

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: Nov 4
Current: £1,442 GBP|Low: £696 GBP|High: £3,270 GBP|Avg: £1,547 GBP|-3.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 5, 2026
Retailer 8£696 GBP
Retailer 10£866 GBP
Retailer 3£942 GBP
Retailer 4£1,004 GBP
Retailer 11£1,004 GBP
Retailer 5£1,312 GBP
Retailer 1£1,442 GBP
Retailer 12£1,595 GBP
Retailer 6£1,848 GBP
Retailer 2£1,883 GBP
Retailer 7£2,617 GBP
Retailer 9£3,244 GBP

40 data points across 12 retailers

15 retailers£696 GBP to £1,595 GBP

B+
Cheapest Retailer
-
£696 GBP
B
Retailer 2
-
£866 GBP
View
B
Retailer 3
-
£942 GBP
View
B
Retailer 4
-
£1,004 GBP
View
Retailer 5
-
£1,004 GBP
View
Price last confirmed 19 days ago
B
Retailer 6
-
£1,133 GBP
View
B
Retailer 7
-
£1,312 GBP
View
B
Retailer 8
-
£1,442 GBP
View
B
Retailer 9
-
£1,595 GBP
View
Retailer 10
-
£1,848 GBP
View
Price under review
Retailer 11
-
£1,883 GBP
View
Price under review
Most Expensive
Friendly Diamonds
3121704 · Nov 4
£1,979 GBP
$2,672 USD
View
Price under review
11 more retailers have this diamond
Prices start from £696 GBPSave up to £899 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 Marquise
£696 GBP