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Cushion|Lab Grown|IGI

1.55ct E SI1 Cushion Lab Grown Diamond

GD • E/SI1 • IGI LG700516097

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG700516097

Diamond specifications and retailer prices

From £194 GBP
$259 USD
As of October 28, 2026
Save £676 GBP (78%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £871 GBP at MOH London · As of October 29, 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 E colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI LG700516097 or 700516097. Listed at 8 retailers as of October 28, 2026, with prices from £194 to £871, a £676 spread on the same certified stone. MOH London lists it at £871. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.55
Carat
E
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.3°
Pavilion angle33.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG700516097
Dimensions6.60 × 6.60 × 4.16 mm
L/W Ratio1.00
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
6.60 mm6.60 mm1.55 ctE / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG700516097
Side View
Table 63.0%Crown 37.3°Girdle: MED-THKPavilion 33.1°Culet: NoneDepth 63.0%

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 28
Current: £871 GBP|Low: £121 GBP|High: £885 GBP|Avg: £431 GBP|-1.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 29, 2026
Retailer 9£121 GBP
Retailer 4£194 GBP
Retailer 8£219 GBP
Retailer 6£294 GBP
Retailer 3£365 GBP
Retailer 2£406 GBP
Retailer 7£676 GBP
Retailer 5£734 GBP
MOH London£871 GBP

40 data points across 9 retailers

8 retailers£194 GBP to £871 GBP

A
Cheapest Retailer
-
£194 GBP
$259 USD
Final sale: no returns
B+
Retailer 2
-
£219 GBP
$291 USD
View
B+
Retailer 3
-
£294 GBP
$392 USD
View
B+
Retailer 4
-
£365 GBP
$486 USD
View
B+
Retailer 5
-
£406 GBP
View
Retailer 6
-
£676 GBP
$900 USD
View
Price last confirmed 8 days ago
B
Retailer 7
-
£734 GBP
$978 USD
View
Most Expensive
B
MOH London
LG700516097 · Oct 29
£871 GBP
View
7 more retailers have this diamond
Prices start from £194 GBPSave up to £676 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
£194 GBP