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Cushion|Lab Grown|IGI

1.36ct E FL Cushion Lab Grown Diamond

GD • E/FL • IGI LG840635031

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG840635031

Diamond specifications and retailer prices

From £358 GBP
$480 USD
As of October 30, 2026
Save £1,470 GBP (80%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £1,829 GBP at Helzberg Diamonds · As of October 30, 2026
View at Helzberg Diamonds

About this 1.36ct lab-grown cushion diamond

This 1.36ct lab-grown cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded E colour (colourless) and FL clarity (flawless or internally-flawless), with a standard cut grade and certified by IGI LG840635031 or 840635031. Listed at 15 retailers as of October 30, 2026, with prices from £358 to £1,829, a £1,470 spread on the same certified stone. Helzberg Diamonds lists it at £1,829. 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

1.36
Carat
E
Colour
FL
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.7°
Pavilion angle38°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840635031
Dimensions7.90 × 5.73 × 3.91 mm
L/W Ratio1.38
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
7.90 mm5.73 mm1.36 ctE / FL
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG840635031
Side View
Table 62.0%Crown 33.7°Girdle: STK-THKPavilion 38°Culet: NoneDepth 68.2%

Caratlytics Score

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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 30
Current: £1,829 GBP|Low: £358 GBP|High: £2,291 GBP|Avg: £1,031 GBP
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
October 30, 2026
Retailer 4£358 GBP
Retailer 8£421 GBP
Retailer 3£571 GBP
Retailer 13£601 GBP
Retailer 5£625 GBP
Retailer 10£634 GBP
Retailer 9£654 GBP
Retailer 12£682 GBP
Retailer 14£767 GBP
Retailer 6£1,259 GBP
Retailer 15£1,300 GBP
Retailer 11£1,465 GBP
Retailer 7£1,508 GBP
Retailer 2£1,605 GBP
Helzberg Diamonds£1,829 GBP

14 data points across 15 retailers

15 retailers£358 GBP to £1,829 GBP

A
Cheapest Retailer
-
£358 GBP
$480 USD
Final sale: no returns
A
Retailer 2
-
£421 GBP
View
A
Retailer 3
-
£571 GBP
$765 USD
View
B+
Retailer 4
-
£601 GBP
$805 USD
View
A
Retailer 5
-
£625 GBP
$837 USD
View
A
Retailer 6
-
£634 GBP
€809 EUR
View
A
Retailer 7
-
£654 GBP
View
A
Retailer 8
-
£682 GBP
ZAR 14,756 ZAR
View
B+
Retailer 9
-
£767 GBP
$1,028 USD
View
B
Retailer 10
-
£1,259 GBP
SGD 2,279 SGD
View
B
Retailer 11
-
£1,300 GBP
$1,741 USD
View
B
Retailer 12
-
£1,465 GBP
View
Retailer 13
-
£1,508 GBP
$2,020 USD
View
Price last confirmed 9 days ago
B
Retailer 14
-
£1,605 GBP
$2,150 USD
View
Most Expensive
B
Helzberg Diamonds
ZXZOKGMJLGJH · Oct 30
£1,829 GBP
$2,450 USD
View
14 more retailers have this diamond
Prices start from £358 GBPSave up to £1,470 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
1.36ct Cushion
£358 GBP