CaratHunter
Plans
Marquise|Lab Grown|IGI

1.55ct E IF Marquise Lab Grown Diamond

EX • E/IF • IGI LG775633135

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG775633135

Diamond specifications and retailer prices

From £754 GBP
$1,010 USD
As of October 30, 2026
Save £1,724 GBP (70%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £2,478 GBP at Brilliant Earth · As of October 30, 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 LG775633135 or 775633135. Listed at 2 retailers as of October 30, 2026, with prices from £754 to £2,478, a £1,724 spread on the same certified stone. Brilliant Earth lists it at £2,478. 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG775633135
Dimensions11.91 × 6.00 × 3.77 mm
L/W Ratio1.99
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
11.91 mm6.00 mm1.55 ctE / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG775633135
Side View
Table 58.0%Crown 34.9°Girdle: THN-MEDPavilion 40.3°Culet: NoneDepth 62.8%

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: Oct 30
Current: £2,478 GBP|Low: £555 GBP|High: £3,041 GBP|Avg: £1,772 GBP|-14.9%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
September 27, 2026
Retailer 2£754 GBP
Retailer 3£1,164 GBP
Retailer 5£1,173 GBP
Retailer 7£1,186 GBP
Retailer 6£1,209 GBP
Retailer 10£1,354 GBP
Retailer 4£1,447 GBP
Retailer 11£1,462 GBP
Brilliant Earth£2,478 GBP
Retailer 12£2,540 GBP
Retailer 9£2,541 GBP
Retailer 8£2,711 GBP

32 data points across 12 retailers

2 retailers£754 GBP to £2,478 GBP

A
Cheapest Retailer
-
£754 GBP
$1,010 USD
Final sale: no returns
Most Expensive
B
Brilliant Earth
18047172A · Oct 30
£2,478 GBP
$3,320 USD
View
1 more retailer has this diamond
Prices start from £754 GBPSave up to £1,724 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
£754 GBP