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Cushion|Lab Grown|IGI

4.26ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG846658009

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG846658009

Diamond specifications and retailer prices

From £3,200 GBP
As of October 30, 2026
Save £18,231 GBP (85%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £21,431 GBP at With Clarity · As of October 28, 2026
View at With Clarity

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 LG846658009 or 846658009. Listed at 9 retailers as of October 28, 2026, with prices from £3,200 to £21,431, a £18,231 spread on the same certified stone. With Clarity lists it at £21,431. 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 angle35.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG846658009
Dimensions10.34 × 8.63 × 5.83 mm
L/W Ratio1.20
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
10.34 mm8.63 mm4.26 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG846658009
Side View
Table 60.0%Crown 36.8°Girdle: STK-THKPavilion 35.3°Culet: NoneDepth 67.6%

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 30
Current: £7,008 GBP|Low: £2,999 GBP|High: £22,037 GBP|Avg: £7,829 GBP|-10.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
With Clarity
October 30, 2026
Retailer 3£3,200 GBP
Retailer 5£3,620 GBP
Retailer 7£4,814 GBP
Retailer 8£5,695 GBP
Retailer 4£6,991 GBP
Retailer 1£7,008 GBP
Retailer 6£7,453 GBP
Retailer 2£11,232 GBP
With Clarity£21,431 GBP

6 data points across 9 retailers

9 retailers£3,200 GBP to £21,431 GBP

A
Cheapest Retailer
-
£3,200 GBP
A
Retailer 2
-
£3,620 GBP
$4,850 USD
View
A
Retailer 3
-
£4,814 GBP
$6,450 USD
View
A
Retailer 4
-
£5,695 GBP
$7,631 USD
View
A
Retailer 5
-
£6,991 GBP
€8,921 EUR
View
B+
Retailer 6
-
£7,008 GBP
$9,390 USD
View
B+
Retailer 7
-
£7,453 GBP
View
B+
Retailer 8
-
£11,232 GBP
$15,050 USD
View
Most Expensive
B
With Clarity
846658009 · Oct 28
£21,431 GBP
$28,715 USD
View
8 more retailers have this diamond
Prices start from £3,200 GBPSave up to £18,231 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
£3,200 GBP