CaratHunter
Plans
Cushion|Lab Grown|IGI

1.50ct E FL Cushion Lab Grown Diamond

GD • E/FL • IGI LG818683531

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG818683531

Diamond specifications and retailer prices

From £654 GBP
HK$6,800 HKD
As of October 30, 2026
Save £2,207 GBP (77%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £2,861 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.5ct lab-grown cushion diamond

This 1.5ct lab-grown cushion sits in the one-and-a-half to two carat band, graded E colour (colourless) and FL clarity (flawless or internally-flawless), with a standard cut grade and certified by IGI LG818683531 or 818683531. Listed at 11 retailers as of October 29, 2026, with prices from £654 to £2,861, a £2,207 spread on the same certified stone. Brilliant Earth lists it at £2,861. 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

1.50
Carat
E
Colour
FL
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.8°
Pavilion angle37.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818683531
Dimensions7.72 × 6.13 × 3.94 mm
L/W Ratio1.26
Girdle conditionFaceted
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
7.72 mm6.13 mm1.50 ctE / FL
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818683531
Side View
Table 62.0%Crown 37.8°Girdle: MED-THKPavilion 37.8°Culet: NoneDepth 64.3%

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: £2,861 GBP|Low: £654 GBP|High: £3,514 GBP|Avg: £1,619 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
October 30, 2026
Retailer 6£654 GBP
Retailer 10£797 GBP
Retailer 9£834 GBP
Retailer 4£870 GBP
Retailer 2£884 GBP
Retailer 8£1,338 GBP
Retailer 7£1,825 GBP
Retailer 3£1,975 GBP
Retailer 5£2,464 GBP
Retailer 11£2,635 GBP
Brilliant Earth£2,861 GBP

32 data points across 11 retailers

11 retailers£654 GBP to £2,861 GBP

A
Cheapest Retailer
-
£654 GBP
HK$6,800 HKD
A
Retailer 2
-
£797 GBP
$1,062 USD
View
A
Retailer 3
-
£834 GBP
$1,110 USD
View
A
Retailer 4
-
£870 GBP
€1,103 EUR
View
A
Retailer 5
-
£884 GBP
View
B+
Retailer 6
-
£1,338 GBP
$1,782 USD
View
B
Retailer 7
-
£1,825 GBP
$2,431 USD
View
Retailer 8
-
£1,975 GBP
$2,630 USD
View
Price last confirmed 32 days ago
B
Retailer 9
-
£2,464 GBP
View
B
Retailer 10
-
£2,635 GBP
$3,509 USD
View
Most Expensive
B
Brilliant Earth
21582178A · Oct 29
£2,861 GBP
$3,810 USD
View
10 more retailers have this diamond
Prices start from £654 GBPSave up to £2,207 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
1.50ct Cushion
£654 GBP