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Marquise|Lab Grown|IGI

1.78ct F VS1 Marquise Lab Grown Diamond

EX • F/VS1 • IGI LG818682269

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG818682269

Diamond specifications and retailer prices

From £210 GBP
$282 USD
As of November 2, 2026
Save £887 GBP (81%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £1,097 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 LG818682269 or 818682269. Listed at 22 retailers as of November 1, 2026, with prices from £210 to £1,097, a £887 spread on the same certified stone. With Clarity lists it at £1,097. 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 angle38.7°
Pavilion angle39.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818682269
Dimensions11.88 × 6.26 × 3.97 mm
L/W Ratio1.90
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.88 mm6.26 mm1.78 ctF / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818682269
Side View
Table 60.0%Crown 38.7°Girdle: STK-VTKPavilion 39.2°Culet: NoneDepth 63.4%

Caratlytics Score

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

Price History

Last verified: Nov 2
Current: £683 GBP|Low: £210 GBP|High: £1,097 GBP|Avg: £571 GBP|-1.0%
Retailer 1
Retailer 2
Retailer 3
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Retailer 11
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Retailer 20
With Clarity
November 2, 2026
Retailer 10£210 GBP
Retailer 11£235 GBP
Retailer 7£244 GBP
Retailer 4£261 GBP
Retailer 6£261 GBP
Retailer 12£304 GBP
Retailer 3£376 GBP
Retailer 20£430 GBP
Retailer 15£449 GBP
Retailer 14£456 GBP
Retailer 18£519 GBP
Retailer 8£519 GBP
Retailer 19£606 GBP
Retailer 1£683 GBP
Retailer 17£805 GBP
Retailer 13£836 GBP
Retailer 5£838 GBP
Retailer 9£875 GBP
Retailer 2£920 GBP
Retailer 16£1,044 GBP
With Clarity£1,097 GBP

25 data points across 21 retailers

22 retailers£210 GBP to £1,097 GBP

A
Cheapest Retailer
-
£210 GBP
$282 USD
A
Retailer 2
-
£235 GBP
$315 USD
View
Final sale: no returns
A
Retailer 3
-
£244 GBP
$327 USD
View
Retailer 4
-
£261 GBP
$350 USD
View
Price last confirmed 8 days ago
A
Retailer 5
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£261 GBP
$350 USD
View
A
Retailer 6
-
£304 GBP
View
A
Retailer 7
-
£376 GBP
$505 USD
View
A
Retailer 8
-
£430 GBP
$577 USD
View
A
Retailer 9
-
£449 GBP
ZAR 9,739 ZAR
View
A
Retailer 10
-
£456 GBP
View
A
Retailer 11
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£519 GBP
$696 USD
View
A
Retailer 12
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£519 GBP
$697 USD
View
A
Retailer 13
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£606 GBP
A$1,251 AUD
View
B+
Retailer 14
-
£683 GBP
$917 USD
View
B+
Retailer 15
-
£805 GBP
A$1,661 AUD
View
B+
Retailer 16
-
£836 GBP
SGD 1,516 SGD
View
B+
Retailer 17
-
£838 GBP
$1,124 USD
View
B+
Retailer 18
-
£875 GBP
$1,174 USD
View
B+
Retailer 19
-
£920 GBP
$1,235 USD
View
B+
Retailer 20
-
£1,002 GBP
$1,345 USD
View
B+
Retailer 21
-
£1,044 GBP
View
Most Expensive
B
With Clarity
818682269 · Nov 1
£1,097 GBP
$1,472 USD
View
21 more retailers have this diamond
Prices start from £210 GBPSave up to £887 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
£210 GBP