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Marquise|Lab Grown|IGI

1.78ct F VS1 Marquise Lab Grown Diamond

EX • F/VS1 • IGI LG844613300

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG844613300

Diamond specifications and retailer prices

From £204 GBP
$274 USD
As of November 1, 2026
Save £753 GBP (79%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £958 GBP at Rare Carat · As of October 28, 2026
View at Rare Carat

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 LG844613300 or 844613300. Listed at 3 retailers as of October 28, 2026, with prices from £204 to £958, a £753 spread on the same certified stone. Rare Carat lists it at £958. 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 angle37.3°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG844613300
Dimensions12.41 × 6.21 × 3.97 mm
L/W Ratio2.00
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
12.41 mm6.21 mm1.78 ctF / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG844613300
Side View
Table 62.0%Crown 37.3°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 63.9%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 1
Current: £958 GBP|Low: £204 GBP|High: £958 GBP|Avg: £537 GBP
Rare Carat
Retailer 2
Retailer 3
October 29, 2026
Retailer 3£204 GBP
Retailer 2£447 GBP
Rare Carat£958 GBP

17 data points across 3 retailers

3 retailers£204 GBP to £958 GBP

A
Cheapest Retailer
-
£204 GBP
$274 USD
Final sale: no returns
A
Retailer 2
-
£447 GBP
View
Most Expensive
B
Rare Carat
844613300 · Oct 28
£958 GBP
$1,285 USD
View
2 more retailers have this diamond
Prices start from £204 GBPSave up to £753 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
£204 GBP