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Marquise|Lab Grown|IGI

1.51ct E IF Marquise Lab Grown Diamond

ID • E/IF • IGI LG818684380

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG818684380

Diamond specifications and retailer prices

From £650 GBP
HK$6,800 HKD
As of October 31, 2026
Save £1,805 GBP (74%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £2,455 GBP at MOH London · As of October 26, 2026
View at MOH London

About this 1.51ct lab-grown marquise diamond

This 1.51ct lab-grown marquise sits in the one-and-a-half to two carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG818684380 or 818684380. Listed at 13 retailers as of October 26, 2026, with prices from £650 to £2,455, a £1,805 spread on the same certified stone. MOH London lists it at £2,455. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.51
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.7°
Pavilion angle39.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818684380
Dimensions11.84 × 6.08 × 3.65 mm
L/W Ratio1.95
Girdle conditionFaceted
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
11.84 mm6.08 mm1.51 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818684380
Side View
Table 61.0%Crown 33.7°Girdle: MED-STKPavilion 39.2°Culet: NoneDepth 60.0%

Caratlytics Score

How it works →
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: Oct 31
Current: £2,455 GBP|Low: £646 GBP|High: £2,481 GBP|Avg: £1,498 GBP|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 31, 2026
Retailer 7£650 GBP
Retailer 10£799 GBP
Retailer 11£838 GBP
Retailer 6£863 GBP
Retailer 2£884 GBP
Retailer 3£1,339 GBP
Retailer 8£1,787 GBP
Retailer 4£1,825 GBP
Retailer 9£1,830 GBP
Retailer 5£1,918 GBP
Retailer 12£1,977 GBP
MOH London£2,455 GBP

32 data points across 12 retailers

13 retailers£650 GBP to £2,455 GBP

A
Cheapest Retailer
-
£650 GBP
HK$6,800 HKD
A
Retailer 2
-
£799 GBP
$1,070 USD
View
A
Retailer 3
-
£838 GBP
$1,123 USD
View
A
Retailer 4
-
£863 GBP
€1,101 EUR
View
A
Retailer 5
-
£884 GBP
View
A
Retailer 6
-
£1,067 GBP
$1,430 USD
View
Retailer 7
-
£1,339 GBP
$1,794 USD
View
Price last confirmed 9 days ago
B+
Retailer 8
-
£1,787 GBP
$2,395 USD
View
B+
Retailer 9
-
£1,825 GBP
$2,446 USD
View
Retailer 10
-
£1,830 GBP
A$3,773 AUD
View
Price last confirmed 24 days ago
B+
Retailer 11
-
£1,918 GBP
$2,570 USD
View
B
Retailer 12
-
£1,977 GBP
$2,649 USD
View
Most Expensive
B
MOH London
LG818684380 · Oct 26
£2,455 GBP
View
12 more retailers have this diamond
Prices start from £650 GBPSave up to £1,805 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
1.51ct Marquise
£650 GBP