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Marquise|Lab Grown|IGI

1.78ct G VS1 Marquise Lab Grown Diamond

EX • G/VS1 • IGI LG815645044

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG815645044

Diamond specifications and retailer prices

From £203 GBP
$272 USD
As of October 28, 2026
Save £893 GBP (81%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £1,096 GBP at Frank Darling · As of October 26, 2026
View at Frank Darling

About this 1.78ct lab-grown marquise diamond

This 1.78ct lab-grown marquise sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG815645044 or 815645044. Listed at 4 retailers as of October 26, 2026, with prices from £203 to £1,096, a £893 spread on the same certified stone. Frank Darling lists it at £1,096. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.78
Carat
G
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.3°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG815645044
Dimensions12.67 × 6.11 × 3.95 mm
L/W Ratio2.07
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
12.67 mm6.11 mm1.78 ctG / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG815645044
Side View
Table 60.0%Crown 37.3°Girdle: MED-STKPavilion 40.2°Culet: NoneDepth 64.6%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 28
Current: £1,096 GBP|Low: £203 GBP|High: £1,096 GBP|Avg: £588 GBP
Frank Darling
Retailer 2
Retailer 3
Retailer 4
October 28, 2026
Retailer 2£203 GBP
Retailer 3£303 GBP
Retailer 4£809 GBP
Frank Darling£1,096 GBP

10 data points across 4 retailers

4 retailers£203 GBP to £1,096 GBP

A
Cheapest Retailer
-
£203 GBP
$272 USD
Final sale: no returns
B+
Retailer 2
-
£303 GBP
$406 USD
View
B+
Retailer 3
-
£809 GBP
$1,084 USD
View
Most Expensive
B
Frank Darling
100755802910KD · Oct 26
£1,096 GBP
$1,469 USD
View
3 more retailers have this diamond
Prices start from £203 GBPSave up to £893 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
1.78ct Marquise
£203 GBP