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Marquise|Lab Grown|IGI

1.20ct D IF Marquise Lab Grown Diamond

ID • D/IF • IGI LG743546432

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG743546432

Diamond specifications and retailer prices

From £249 GBP
As of November 4, 2026
Save £1,234 GBP (83%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: £1,483 GBP at MOH London · As of November 3, 2026
View at MOH London

About this 1.2ct lab-grown marquise diamond

This 1.2ct lab-grown marquise sits in the classic one-carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG743546432 or 743546432. Listed at 25 retailers as of November 3, 2026, with prices from £249 to £1,483, a £1,234 spread on the same certified stone. MOH London lists it at £1,483. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.20
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle39.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG743546432
Dimensions11.13 × 5.41 × 3.40 mm
L/W Ratio2.06
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
11.13 mm5.41 mm1.20 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG743546432
Side View
Table 61.0%Crown 36°Girdle: STK-THKPavilion 39.2°Culet: NoneDepth 62.8%

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 4
Current: £1,483 GBP|Low: £249 GBP|High: £1,501 GBP|Avg: £817 GBP|-1.2%
MOH London
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November 5, 2026
Retailer 22£249 GBP
Retailer 21£279 GBP
Retailer 6£289 GBP
Retailer 2£309 GBP
Retailer 19£360 GBP
Retailer 18£404 GBP
Retailer 3£437 GBP
Retailer 13£545 GBP
Retailer 16£571 GBP
Retailer 17£610 GBP
Retailer 12£647 GBP
Retailer 10£696 GBP
Retailer 8£704 GBP
Retailer 14£759 GBP
Retailer 20£759 GBP
Retailer 24£907 GBP
Retailer 23£993 GBP
Retailer 9£1,025 GBP
Retailer 5£1,038 GBP
Retailer 15£1,130 GBP
Retailer 7£1,181 GBP
Retailer 4£1,207 GBP
Retailer 11£1,319 GBP
MOH London£1,483 GBP

27 data points across 24 retailers

25 retailers£249 GBP to £1,483 GBP

A
Cheapest Retailer
-
£249 GBP
A
Retailer 2
-
£279 GBP
View
Final sale: no returns
A
Retailer 3
-
£289 GBP
View
A
Retailer 4
-
£309 GBP
View
A
Retailer 5
-
£360 GBP
View
A
Retailer 6
-
£404 GBP
View
A
Retailer 7
-
£437 GBP
View
A
Retailer 8
-
£545 GBP
View
B+
Retailer 9
-
£571 GBP
View
B+
Retailer 10
-
£610 GBP
View
B+
Retailer 11
-
£647 GBP
View
B+
Retailer 12
-
£696 GBP
View
B+
Retailer 13
-
£704 GBP
View
B+
Retailer 14
-
£759 GBP
View
B+
Retailer 15
-
£759 GBP
View
B+
Retailer 16
-
£907 GBP
View
B
Retailer 17
-
£993 GBP
View
B
Retailer 18
-
£1,025 GBP
View
B
Retailer 19
-
£1,038 GBP
View
Retailer 20
-
£1,130 GBP
View
Price last confirmed 8 days ago
B
Retailer 21
-
£1,181 GBP
View
B
Retailer 22
-
£1,207 GBP
View
Retailer 23
-
£1,250 GBP
View
Price last confirmed 28 days ago
B
Retailer 24
-
£1,319 GBP
View
Most Expensive
B
MOH London
LG743546432 · Nov 3
£1,483 GBP
View
24 more retailers have this diamond
Prices start from £249 GBPSave up to £1,234 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
1.20ct Marquise
£249 GBP