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Cushion|Lab Grown|IGI

1.40ct D IF Cushion Lab Grown Diamond

D/IF • IGI LG768632638

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

Certificate IGI LG768632638

Diamond specifications and retailer prices

From £263 GBP
$352 USD
As of October 30, 2026
Save £1,678 GBP (86%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £1,940 GBP at Do Amore Diamonds · As of October 30, 2026
View at Do Amore Diamonds

About this 1.4ct lab-grown cushion diamond

This 1.4ct lab-grown cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless) and certified by IGI LG768632638 or 768632638. Listed at 13 retailers as of October 30, 2026, with prices from £263 to £1,940, a £1,678 spread on the same certified stone. Do Amore Diamonds lists it at £1,940. 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

1.40
Carat
D
Colour
IF
Clarity
-
Cut

Specifications

Cut
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.3°
Pavilion angle39.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG768632638
Dimensions6.46 × 6.25 × 4.42 mm
L/W Ratio1.03
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
6.46 mm6.25 mm1.40 ctD / IF
OriginLab Grown
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG768632638
Side View
Table 61.0%Crown 37.3°Girdle: STK-THKPavilion 39.5°Culet: NoneDepth 70.7%

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: £1,940 GBP|Low: £188 GBP|High: £2,284 GBP|Avg: £985 GBP|-4.8%
Do Amore 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
October 31, 2026
Retailer 5£263 GBP
Retailer 3£384 GBP
Retailer 10£394 GBP
Retailer 11£444 GBP
Retailer 7£498 GBP
Retailer 4£600 GBP
Retailer 9£729 GBP
Retailer 12£847 GBP
Retailer 8£1,204 GBP
Retailer 13£1,552 GBP
Retailer 2£1,564 GBP
Retailer 6£1,754 GBP
Do Amore Diamonds£1,940 GBP

30 data points across 13 retailers

13 retailers£263 GBP to £1,940 GBP

A
Cheapest Retailer
-
£263 GBP
$352 USD
Final sale: no returns
A
Retailer 2
-
£384 GBP
$515 USD
View
A
Retailer 3
-
£394 GBP
$528 USD
View
B+
Retailer 4
-
£444 GBP
$595 USD
View
A
Retailer 5
-
£498 GBP
€635 EUR
View
A
Retailer 6
-
£600 GBP
$804 USD
View
A
Retailer 7
-
£729 GBP
A$1,502 AUD
View
B+
Retailer 8
-
£847 GBP
$1,135 USD
View
B+
Retailer 9
-
£1,204 GBP
View
Retailer 10
-
£1,552 GBP
$2,080 USD
View
Price last confirmed 12 days ago
B
Retailer 11
-
£1,564 GBP
A$3,223 AUD
View
B
Retailer 12
-
£1,754 GBP
$2,350 USD
View
Most Expensive
B
Do Amore Diamonds
27-BBE79FD92 · Oct 30
£1,940 GBP
$2,600 USD
View
12 more retailers have this diamond
Prices start from £263 GBPSave up to £1,678 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
1.40ct Cushion
£263 GBP