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Marquise|Lab Grown|IGI

1.21ct F VS1 Marquise Lab Grown Diamond

ID • F/VS1 • IGI LG852648471

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG852648471

Diamond specifications and retailer prices

From £403 GBP
As of November 6, 2026
Save £1,265 GBP (76%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £1,869 GBP at MOH London · As of November 5, 2026
View at MOH London

About this 1.21ct lab-grown marquise diamond

This 1.21ct lab-grown marquise sits in the classic one-carat band, graded F colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG852648471 or 852648471. Listed at 7 retailers as of November 6, 2026, with a 314% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.21
Carat
F
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle39.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG852648471
Dimensions10.80 × 5.49 × 3.47 mm
L/W Ratio1.97
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.80 mm5.49 mm1.21 ctF / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG852648471
Side View
Table 58.0%Crown 35.5°Girdle: MED-STKPavilion 39.7°Culet: NoneDepth 63.2%

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 6
Current: £1,869 GBP|Low: £403 GBP|High: £1,874 GBP|Avg: £1,042 GBP|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 4£403 GBP
Retailer 3£601 GBP
Retailer 5£615 GBP
Retailer 2£736 GBP
Retailer 6£1,464 GBP
Retailer 7£1,668 GBP
MOH London£1,869 GBP

8 data points across 7 retailers

7 retailers£403 GBP to £1,668 GBP

A
Cheapest Retailer
-
£403 GBP
B+
Retailer 2
-
£601 GBP
View
B+
Retailer 3
-
£615 GBP
View
B
Retailer 4
-
£736 GBP
View
B
Retailer 5
-
£1,464 GBP
View
B
Retailer 6
-
£1,668 GBP
View
Most Expensive
MOH London
LG852648471 · Nov 5
£1,869 GBP
View
Price under review
6 more retailers have this diamond
Prices start from £403 GBPSave up to £1,265 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
1.21ct Marquise
£403 GBP