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Cushion|Lab Grown|IGI

1.55ct E VS1 Cushion Lab Grown Diamond

GD • E/VS1 • IGI LG690504928

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

Certificate IGI LG690504928

Diamond specifications and retailer prices

From £200 GBP
$266 USD
As of October 28, 2026
Save £704 GBP (78%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £1,547 GBP at Brilliant Earth · As of October 16, 2026
View at Brilliant Earth

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 VS1 clarity (very-slightly-included), with a standard cut grade and certified by IGI LG690504928 or 690504928. Listed at 16 retailers as of October 28, 2026, with a 353% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
VS1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.1°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG690504928
Dimensions6.88 × 6.76 × 4.50 mm
L/W Ratio1.02
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
6.88 mm6.76 mm1.55 ctE / VS1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG690504928
Side View
Table 65.0%Crown 36.1°Girdle: MED-THKPavilion 40.2°Culet: NoneDepth 66.6%

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: £1,547 GBP|Low: £200 GBP|High: £1,547 GBP|Avg: £518 GBP
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
October 29, 2026
Retailer 3£200 GBP
Retailer 10£222 GBP
Retailer 11£261 GBP
Retailer 4£375 GBP
Retailer 6£377 GBP
Retailer 8£382 GBP
Retailer 5£412 GBP
Retailer 2£419 GBP
Retailer 9£518 GBP
Retailer 12£576 GBP
Retailer 7£896 GBP
Retailer 13£904 GBP
Brilliant Earth£1,547 GBP

42 data points across 13 retailers

16 retailers£200 GBP to £904 GBP

A
Cheapest Retailer
-
£200 GBP
$266 USD
Final sale: no returns
A
Retailer 2
-
£222 GBP
$296 USD
View
A
Retailer 3
-
£261 GBP
View
Price last confirmed 12 days ago
B+
Retailer 4
-
£375 GBP
$499 USD
View
A
Retailer 5
-
£377 GBP
€478 EUR
View
A
Retailer 6
-
£382 GBP
ZAR 8,212 ZAR
View
B+
Retailer 7
-
£406 GBP
$540 USD
View
B+
Retailer 8
-
£412 GBP
$549 USD
View
B+
Retailer 9
-
£419 GBP
View
B+
Retailer 10
-
£518 GBP
A$1,061 AUD
View
B
Retailer 11
-
£576 GBP
$767 USD
View
B
Retailer 12
-
£681 GBP
$907 USD
View
B
Retailer 13
-
£753 GBP
$1,003 USD
View
B
Retailer 14
-
£896 GBP
View
B
Retailer 15
-
£904 GBP
$1,204 USD
View
Most Expensive
C
Brilliant Earth
14979486A · Oct 16
£1,547 GBP
$2,060 USD
View
Price last confirmed 13 days ago
15 more retailers have this diamond
Prices start from £200 GBPSave up to £704 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
£200 GBP