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Marquise|Lab Grown|IGI

1.78ct F VS1 Marquise Lab Grown Diamond

ID • F/VS1 • IGI LG840631245

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG840631245

Diamond specifications and retailer prices

From £231 GBP
$310 USD
As of November 2, 2026
Save £920 GBP (80%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £1,151 GBP at Reve Diamonds · As of November 1, 2026
View at Reve 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 LG840631245 or 840631245. Listed at 18 retailers as of November 1, 2026, with prices from £231 to £1,151, a £920 spread on the same certified stone. Reve Diamonds lists it at £1,151. 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 angle34.1°
Pavilion angle39.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840631245
Dimensions13.14 × 6.18 × 3.82 mm
L/W Ratio2.13
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
13.14 mm6.18 mm1.78 ctF / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG840631245
Side View
Table 57.0%Crown 34.1°Girdle: MED-STKPavilion 39.2°Culet: NoneDepth 61.8%

Caratlytics Score

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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: £881 GBP|Low: £229 GBP|High: £1,185 GBP|Avg: £589 GBP|+2.2%
Retailer 1
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Retailer 18
Reve Diamonds
November 2, 2026
Retailer 12£231 GBP
Retailer 6£259 GBP
Retailer 9£284 GBP
Retailer 18£287 GBP
Retailer 11£335 GBP
Retailer 16£386 GBP
Retailer 17£402 GBP
Retailer 14£494 GBP
Retailer 10£495 GBP
Retailer 13£510 GBP
Retailer 3£528 GBP
Retailer 7£662 GBP
Retailer 8£821 GBP
Retailer 1£881 GBP
Retailer 2£921 GBP
Retailer 5£956 GBP
Retailer 4£1,101 GBP
Retailer 15£1,149 GBP
Reve Diamonds£1,151 GBP

28 data points across 19 retailers

18 retailers£231 GBP to £1,151 GBP

A
Cheapest Retailer
-
£231 GBP
$310 USD
A
Retailer 2
-
£259 GBP
$347 USD
View
Final sale: no returns
Retailer 3
-
£284 GBP
$381 USD
View
Price last confirmed 8 days ago
A
Retailer 4
-
£287 GBP
$385 USD
View
A
Retailer 5
-
£335 GBP
View
B+
Retailer 6
-
£386 GBP
$518 USD
View
A
Retailer 7
-
£402 GBP
$540 USD
View
A
Retailer 8
-
£494 GBP
ZAR 10,714 ZAR
View
A
Retailer 9
-
£510 GBP
View
A
Retailer 10
-
£528 GBP
$708 USD
View
A
Retailer 11
-
£662 GBP
A$1,367 AUD
View
Retailer 12
-
£821 GBP
A$1,694 AUD
View
Price last confirmed 8 days ago
B
Retailer 13
-
£881 GBP
$1,182 USD
View
B+
Retailer 14
-
£921 GBP
$1,236 USD
View
B+
Retailer 15
-
£956 GBP
$1,283 USD
View
B
Retailer 16
-
£1,101 GBP
$1,478 USD
View
B
Retailer 17
-
£1,149 GBP
View
Most Expensive
B
Reve Diamonds
8EE645827 · Nov 1
£1,151 GBP
$1,545 USD
View
17 more retailers have this diamond
Prices start from £231 GBPSave up to £920 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
£231 GBP