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Marquise|Lab Grown|IGI

1.78ct F VS1 Marquise Lab Grown Diamond

ID • F/VS1 • IGI LG847640520

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG847640520

Diamond specifications and retailer prices

From £199 GBP
$267 USD
As of November 2, 2026
Save £867 GBP (81%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £1,066 GBP at With Clarity · As of November 1, 2026
View at With Clarity

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 LG847640520 or 847640520. Listed at 12 retailers as of November 1, 2026, with prices from £199 to £1,066, a £867 spread on the same certified stone. With Clarity lists it at £1,066. 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG847640520
Dimensions12.53 × 6.32 × 3.95 mm
L/W Ratio1.98
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
12.53 mm6.32 mm1.78 ctF / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG847640520
Side View
Table 60.0%Crown 36°Girdle: MED-STKPavilion 40.3°Culet: NoneDepth 62.5%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: £289 GBP|Low: £199 GBP|High: £1,066 GBP|Avg: £608 GBP|-0.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
With Clarity
November 2, 2026
Retailer 11£199 GBP
Retailer 9£231 GBP
Retailer 1£289 GBP
Retailer 5£365 GBP
Retailer 2£406 GBP
Retailer 3£506 GBP
Retailer 10£574 GBP
Retailer 4£759 GBP
Retailer 7£794 GBP
Retailer 8£905 GBP
Retailer 6£995 GBP
With Clarity£1,066 GBP

10 data points across 12 retailers

12 retailers£199 GBP to £1,066 GBP

A
Cheapest Retailer
-
£199 GBP
$267 USD
A
Retailer 2
-
£231 GBP
$310 USD
View
A
Retailer 3
-
£289 GBP
View
A
Retailer 4
-
£365 GBP
$490 USD
View
Retailer 5
-
£406 GBP
€519 EUR
View
Price last confirmed 8 days ago
A
Retailer 6
-
£506 GBP
$679 USD
View
A
Retailer 7
-
£574 GBP
A$1,185 AUD
View
B+
Retailer 8
-
£759 GBP
$1,018 USD
View
B+
Retailer 9
-
£794 GBP
$1,065 USD
View
B
Retailer 10
-
£905 GBP
$1,215 USD
View
B
Retailer 11
-
£995 GBP
View
Most Expensive
B
With Clarity
847640520 · Nov 1
£1,066 GBP
$1,430 USD
View
11 more retailers have this diamond
Prices start from £199 GBPSave up to £867 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
£199 GBP