CaratHunter
Plans
Cushion|Lab Grown|IGI

1.55ct F SI1 Cushion Lab Grown Diamond

ID • F/SI1 • IGI LG733546286

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG733546286

Diamond specifications and retailer prices

From £325 GBP
€415 EUR
As of November 2, 2026
Save £464 GBP (59%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £788 GBP at MOH London · As of November 2, 2026
View at MOH London

About this 1.55ct lab-grown cushion diamond

This 1.55ct lab-grown cushion sits in the one-and-a-half to two carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG733546286 or 733546286. Listed at 8 retailers as of November 2, 2026, with prices from £325 to £788, a £464 spread on the same certified stone. MOH London lists it at £788. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.55
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.2°
Pavilion angle35.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG733546286
Dimensions7.75 × 6.03 × 4.03 mm
L/W Ratio1.29
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.75 mm6.03 mm1.55 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG733546286
Side View
Table 62.0%Crown 35.2°Girdle: MED-THKPavilion 35.7°Culet: NoneDepth 66.8%

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: Nov 2
Current: £788 GBP|Low: £280 GBP|High: £798 GBP|Avg: £459 GBP|+1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 3, 2026
Retailer 4£325 GBP
Retailer 6£338 GBP
Retailer 2£360 GBP
Retailer 7£364 GBP
Retailer 5£443 GBP
Retailer 3£645 GBP
MOH London£788 GBP

36 data points across 7 retailers

8 retailers£325 GBP to £788 GBP

A
Cheapest Retailer
-
£325 GBP
€415 EUR
B+
Retailer 2
-
£338 GBP
$453 USD
View
A
Retailer 3
-
£360 GBP
View
A
Retailer 4
-
£364 GBP
$488 USD
View
A
Retailer 5
-
£443 GBP
$595 USD
View
B+
Retailer 6
-
£637 GBP
$855 USD
View
B+
Retailer 7
-
£645 GBP
$865 USD
View
Most Expensive
B+
MOH London
LG733546286 · Nov 2
£788 GBP
View
7 more retailers have this diamond
Prices start from £325 GBPSave up to £464 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 Cushion
£325 GBP