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Cushion|Lab Grown|IGI

1.40ct D IF Cushion Lab Grown Diamond

VG • D/IF • IGI LG843612983

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG843612983

Diamond specifications and retailer prices

From £392 GBP
HK$4,100 HKD
As of October 31, 2026
Save £1,400 GBP (78%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £1,791 GBP at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

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), with a very-good cut grade and certified by IGI LG843612983 or 843612983. Listed at 13 retailers as of October 30, 2026, with prices from £392 to £1,791, a £1,400 spread on the same certified stone. Brilliant Earth lists it at £1,791. 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
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.8°
Pavilion angle36.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG843612983
Dimensions7.45 × 6.04 × 4.02 mm
L/W Ratio1.23
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
7.45 mm6.04 mm1.40 ctD / IF
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG843612983
Side View
Table 59.0%Crown 36.8°Girdle: MED-THKPavilion 36.7°Culet: NoneDepth 66.6%

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 31
Current: £1,791 GBP|Low: £392 GBP|High: £1,791 GBP|Avg: £816 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
October 31, 2026
Retailer 12£392 GBP
Retailer 3£481 GBP
Retailer 2£550 GBP
Retailer 7£585 GBP
Retailer 5£615 GBP
Retailer 9£773 GBP
Retailer 10£782 GBP
Retailer 4£1,124 GBP
Retailer 11£1,311 GBP
Retailer 8£1,333 GBP
Retailer 6£1,564 GBP
Brilliant Earth£1,791 GBP

10 data points across 12 retailers

13 retailers£392 GBP to £1,791 GBP

A
Cheapest Retailer
-
£392 GBP
HK$4,100 HKD
A
Retailer 2
-
£481 GBP
$645 USD
View
A
Retailer 3
-
£550 GBP
€702 EUR
View
A
Retailer 4
-
£585 GBP
ZAR 12,668 ZAR
View
A
Retailer 5
-
£615 GBP
View
B+
Retailer 6
-
£773 GBP
$1,036 USD
View
B+
Retailer 7
-
£782 GBP
$1,047 USD
View
B+
Retailer 8
-
£948 GBP
$1,270 USD
View
B+
Retailer 9
-
£1,124 GBP
$1,507 USD
View
B
Retailer 10
-
£1,311 GBP
$1,756 USD
View
B
Retailer 11
-
£1,333 GBP
View
B
Retailer 12
-
£1,564 GBP
A$3,223 AUD
View
Most Expensive
B
Brilliant Earth
22234405A · Oct 30
£1,791 GBP
$2,400 USD
View
12 more retailers have this diamond
Prices start from £392 GBPSave up to £1,400 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
£392 GBP