CaratHunter
Plans
Marquise|Lab Grown|IGI

1.55ct E IF Marquise Lab Grown Diamond

ID • E/IF • IGI LG790654384

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG790654384

Diamond specifications and retailer prices

From £339 GBP
$451 USD
As of October 27, 2026
Save £1,971 GBP (85%) vs most expensive(unlock to see where)
28 retailers carry this diamond
Most expensive: £2,310 GBP at Brilliant Earth · As of October 28, 2026
View at Brilliant Earth

About this 1.55ct lab-grown marquise diamond

This 1.55ct 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 LG790654384 or 790654384. Listed at 28 retailers as of October 27, 2026, with prices from £339 to £2,310, a £1,971 spread on the same certified stone. Brilliant Earth lists it at £2,310. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.55
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.6°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG790654384
Dimensions11.77 × 6.07 × 11.77 mm
L/W Ratio1.94
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.77 mm6.07 mm1.55 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG790654384
Side View
Table 59.0%Crown 34.6°Girdle: MED-THKPavilion 40.6°Culet: NoneDepth 62.4%

Caratlytics Score

How it works →
A+
Exceptional
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: Oct 27
Current: £2,310 GBP|Low: £379 GBP|High: £2,318 GBP|Avg: £1,108 GBP|-0.3%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
Retailer 21
October 28, 2026
Retailer 13£379 GBP
Retailer 21£380 GBP
Retailer 19£462 GBP
Retailer 16£527 GBP
Retailer 8£564 GBP
Retailer 7£657 GBP
Retailer 17£670 GBP
Retailer 15£692 GBP
Retailer 3£699 GBP
Retailer 2£723 GBP
Retailer 6£841 GBP
Retailer 4£988 GBP
Retailer 20£1,132 GBP
Retailer 10£1,335 GBP
Retailer 11£1,377 GBP
Retailer 5£1,477 GBP
Retailer 9£1,501 GBP
Retailer 18£1,548 GBP
Retailer 14£1,787 GBP
Retailer 12£1,830 GBP
Brilliant Earth£2,310 GBP

30 data points across 21 retailers

28 retailers£339 GBP to £2,310 GBP

A+
Cheapest Retailer
-
£339 GBP
$451 USD
A
Retailer 2
-
£379 GBP
$504 USD
View
Final sale: no returns
A
Retailer 3
-
£380 GBP
$505 USD
View
A
Retailer 4
-
£421 GBP
$559 USD
View
Price last confirmed 13 days ago
A
Retailer 5
-
£421 GBP
$559 USD
View
A
Retailer 6
-
£462 GBP
HK$4,800 HKD
View
A
Retailer 7
-
£527 GBP
$700 USD
View
A
Retailer 8
-
£564 GBP
$750 USD
View
A
Retailer 9
-
£657 GBP
$873 USD
View
A
Retailer 10
-
£670 GBP
€848 EUR
View
A
Retailer 11
-
£692 GBP
View
A
Retailer 12
-
£699 GBP
A$1,428 AUD
View
A
Retailer 13
-
£723 GBP
ZAR 15,530 ZAR
View
A
Retailer 14
-
£841 GBP
$1,117 USD
View
A
Retailer 15
-
£988 GBP
A$2,019 AUD
View
Price last confirmed 9 days ago
A
Retailer 16
-
£1,018 GBP
$1,353 USD
View
B+
Retailer 17
-
£1,132 GBP
$1,504 USD
View
Price last confirmed 7 days ago
B+
Retailer 18
-
£1,335 GBP
SGD 2,397 SGD
View
B+
Retailer 19
-
£1,353 GBP
$1,798 USD
View
B+
Retailer 20
-
£1,377 GBP
$1,830 USD
View
B+
Retailer 21
-
£1,413 GBP
$1,878 USD
View
B+
Retailer 22
-
£1,477 GBP
$1,962 USD
View
B+
Retailer 23
-
£1,501 GBP
$1,995 USD
View
B+
Retailer 24
-
£1,548 GBP
View
B+
Retailer 25
-
£1,787 GBP
$2,375 USD
View
Price last confirmed 21 days ago
B+
Retailer 26
-
£1,830 GBP
A$3,740 AUD
View
Price last confirmed 21 days ago
B+
Retailer 27
-
£1,845 GBP
View
Most Expensive
B
Brilliant Earth
20474298A · Oct 28
£2,310 GBP
$3,070 USD
View
27 more retailers have this diamond
Prices start from £339 GBPSave up to £1,971 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+
1.55ct Marquise
£339 GBP