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Cushion|Lab Grown|IGI

1.39ct D IF Cushion Lab Grown Diamond

FR • D/IF • IGI LG766669628

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG766669628

Diamond specifications and retailer prices

From £916 GBP
$1,228 USD
As of October 31, 2026
Save £1,909 GBP (68%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £2,825 GBP at Michael Trio · As of October 31, 2026
View at Michael Trio

About this 1.39ct lab-grown cushion diamond

This 1.39ct 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 standard cut grade and certified by IGI LG766669628 or 766669628. Listed at 7 retailers as of October 31, 2026, with prices from £916 to £2,825, a £1,909 spread on the same certified stone. Michael Trio lists it at £2,825. 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

1.39
Carat
D
Colour
IF
Clarity
Fair
Cut

Specifications

CutFair
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.9°
Pavilion angle36.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG766669628
Dimensions7.76 × 6.32 × 3.92 mm
L/W Ratio1.23
Girdle conditionFaceted
Culet sizeLarge
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
7.76 mm6.32 mm1.39 ctD / IF
OriginLab Grown
CutFair
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG766669628
Side View
Table 45.0%Crown 35.9°Girdle: MED-STKPavilion 36.6°Culet: LargeDepth 62.0%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: £2,825 GBP|Low: £916 GBP|High: £3,429 GBP|Avg: £1,656 GBP|-17.6%
Michael Trio
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 30, 2026
Retailer 6£916 GBP
Retailer 5£1,048 GBP
Retailer 7£1,205 GBP
Retailer 3£1,298 GBP
Retailer 4£1,650 GBP
Retailer 2£1,679 GBP
Michael Trio£2,825 GBP

41 data points across 7 retailers

7 retailers£916 GBP to £2,825 GBP

B+
Cheapest Retailer
-
£916 GBP
$1,228 USD
B+
Retailer 2
-
£1,048 GBP
$1,404 USD
View
B
Retailer 3
-
£1,205 GBP
$1,615 USD
View
B
Retailer 4
-
£1,298 GBP
View
B
Retailer 5
-
£1,650 GBP
€2,106 EUR
View
B
Retailer 6
-
£1,679 GBP
$2,250 USD
View
Most Expensive
C
Michael Trio
1329784745 · Oct 31
£2,825 GBP
SGD 5,116 SGD
View
6 more retailers have this diamond
Prices start from £916 GBPSave up to £1,909 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.

B+
1.39ct Cushion
£916 GBP