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Cushion|Lab Grown|IGI

4.26ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG804667177

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG804667177

Diamond specifications and retailer prices

From £3,069 GBP
$4,087 USD
As of October 29, 2026
Save £16,373 GBP (84%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £19,442 GBP at Do Amore Diamonds · As of October 28, 2026
View at Do Amore Diamonds

About this 4.26ct lab-grown cushion diamond

This 4.26ct lab-grown cushion sits in the three to five carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG804667177 or 804667177. Listed at 10 retailers as of October 28, 2026, with prices from £3,069 to £19,442, a £16,373 spread on the same certified stone. Do Amore Diamonds lists it at £19,442. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

4.26
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.8°
Pavilion angle36.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG804667177
Dimensions10.80 × 8.44 × 5.84 mm
L/W Ratio1.28
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
10.80 mm8.44 mm4.26 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG804667177
Side View
Table 62.0%Crown 36.8°Girdle: THK-VTKPavilion 36.2°Culet: NoneDepth 69.2%

Caratlytics Score

How it works →
A+
Exceptional
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 29
Current: £19,442 GBP|Low: £3,069 GBP|High: £24,736 GBP|Avg: £8,589 GBP|-21.4%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 30, 2026
Retailer 8£3,069 GBP
Retailer 5£3,372 GBP
Retailer 2£3,565 GBP
Retailer 10£4,273 GBP
Retailer 7£5,079 GBP
Retailer 4£6,207 GBP
Retailer 11£6,414 GBP
Retailer 6£7,480 GBP
Retailer 3£11,190 GBP
Retailer 9£16,798 GBP
Do Amore Diamonds£19,442 GBP

26 data points across 11 retailers

10 retailers£3,069 GBP to £19,442 GBP

A+
Cheapest Retailer
-
£3,069 GBP
$4,087 USD
A
Retailer 2
-
£3,372 GBP
$4,490 USD
View
A
Retailer 3
-
£3,565 GBP
$4,747 USD
View
A
Retailer 4
-
£4,273 GBP
$5,690 USD
View
Final sale: no returns
A
Retailer 5
-
£5,079 GBP
$6,764 USD
View
A
Retailer 6
-
£6,207 GBP
€7,872 EUR
View
Retailer 7
-
£6,414 GBP
$8,542 USD
View
Price last confirmed 81 days ago
B+
Retailer 8
-
£7,480 GBP
View
B
Retailer 9
-
£16,798 GBP
$22,370 USD
View
Most Expensive
B
Do Amore Diamonds
27-514776E4B · Oct 28
£19,442 GBP
$25,890 USD
View
9 more retailers have this diamond
Prices start from £3,069 GBPSave up to £16,373 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+
4.26ct Cushion
£3,069 GBP