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Cushion|Lab Grown|IGI

4.25ct D FL Cushion Lab Grown Diamond

VG • D/FL • IGI LG784642755

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

Certificate IGI LG784642755

Diamond specifications and retailer prices

From £3,067 GBP
$4,110 USD
As of October 30, 2026
Save £16,076 GBP (84%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £19,143 GBP at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

About this 4.25ct lab-grown cushion diamond

This 4.25ct lab-grown cushion sits in the three to five carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a very-good cut grade and certified by IGI LG784642755 or 784642755. Listed at 11 retailers as of October 30, 2026, with prices from £3,067 to £19,143, a £16,076 spread on the same certified stone. Do Amore Diamonds lists it at £19,143. 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

4.25
Carat
D
Colour
FL
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle39.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG784642755
Dimensions9.40 × 9.35 × 6.30 mm
L/W Ratio1.01
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
9.40 mm9.35 mm4.25 ctD / FL
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG784642755
Side View
Table 60.0%Crown 36°Girdle: STK-THKPavilion 39.6°Culet: NoneDepth 67.4%

Caratlytics Score

How it works →
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: £19,143 GBP|Low: £3,044 GBP|High: £24,524 GBP|Avg: £8,206 GBP|-21.9%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 30, 2026
Retailer 2£3,067 GBP
Retailer 6£3,344 GBP
Retailer 4£3,528 GBP
Retailer 9£4,237 GBP
Retailer 8£5,036 GBP
Retailer 5£6,155 GBP
Retailer 10£6,353 GBP
Retailer 7£7,673 GBP
Retailer 3£9,829 GBP
Do Amore Diamonds£19,143 GBP

26 data points across 10 retailers

11 retailers£3,067 GBP to £19,143 GBP

A
Cheapest Retailer
-
£3,067 GBP
$4,110 USD
A
Retailer 2
-
£3,344 GBP
$4,480 USD
View
A
Retailer 3
-
£3,528 GBP
$4,727 USD
View
A
Retailer 4
-
£4,237 GBP
$5,677 USD
View
Final sale: no returns
A
Retailer 5
-
£5,036 GBP
$6,748 USD
View
A
Retailer 6
-
£6,155 GBP
€7,854 EUR
View
Retailer 7
-
£6,353 GBP
$8,512 USD
View
Price last confirmed 82 days ago
B+
Retailer 8
-
£7,673 GBP
View
B+
Retailer 9
-
£9,829 GBP
$13,170 USD
View
B
Retailer 10
-
£15,086 GBP
$20,214 USD
View
Most Expensive
B
Do Amore Diamonds
27-92947CFD3 · Oct 31
£19,143 GBP
$25,650 USD
View
10 more retailers have this diamond
Prices start from £3,067 GBPSave up to £16,076 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
4.25ct Cushion
£3,067 GBP