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Marquise|Lab Grown|IGI

1.78ct F VS1 Marquise Lab Grown Diamond

EX • F/VS1 • IGI LG837615313

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG837615313

Diamond specifications and retailer prices

From £356 GBP
$477 USD
As of November 2, 2026
Save £482 GBP (58%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £838 GBP at Novita Diamonds · As of October 29, 2026
View at Novita Diamonds

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 F colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG837615313 or 837615313. Listed at 6 retailers as of October 29, 2026, with prices from £356 to £838, a £482 spread on the same certified stone. Novita Diamonds lists it at £838. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.78
Carat
F
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.8°
Pavilion angle41.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG837615313
Dimensions12.55 × 6.30 × 4.04 mm
L/W Ratio1.99
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
12.55 mm6.30 mm1.78 ctF / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG837615313
Side View
Table 57.0%Crown 34.8°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 64.1%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 2
Current: £838 GBP|Low: £356 GBP|High: £838 GBP|Avg: £449 GBP
Novita Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 29, 2026
Retailer 5£356 GBP
Retailer 6£379 GBP
Retailer 4£416 GBP
Retailer 7£458 GBP
Retailer 2£468 GBP
Retailer 3£487 GBP
Novita Diamonds£838 GBP

13 data points across 7 retailers

6 retailers£356 GBP to £838 GBP

A
Cheapest Retailer
-
£356 GBP
$477 USD
B+
Retailer 2
-
£379 GBP
$508 USD
View
A
Retailer 3
-
£416 GBP
$557 USD
View
A
Retailer 4
-
£421 GBP
$564 USD
View
A
Retailer 5
-
£487 GBP
€621 EUR
View
Most Expensive
B+
Novita Diamonds
cert_837615313 · Oct 29
£838 GBP
A$1,727 AUD
View
5 more retailers have this diamond
Prices start from £356 GBPSave up to £482 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
£356 GBP