Cushion|Lab Grown|GIA

4.26ct D FL Cushion Lab Grown Diamond

EX • D/FL • GIA 3515897073

Certificate GIA 3515897073

Diamond specifications and retailer prices

From £14,041 GBP
$18,698 USD
As of October 30, 2026
Save £17,083 GBP (55%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £31,124 GBP at Brilliance · As of October 27, 2026
View at Brilliance

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 stated by the retailer rather than the lab and certified by GIA 3515897073. Listed at 12 retailers as of October 27, 2026, with prices from £14,041 to £31,124, a £17,083 spread on the same certified stone. Brilliance lists it at £31,124. 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
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabGIA
CertificateGIA 3515897073
Dimensions9.40 × 9.39 × 6.22 mm
L/W Ratio1.00
Culet sizeNone
Top View
9.40 mm9.39 mm4.26 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 3515897073
Side View
Table 59.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 66.2%

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 30
Current: £31,124 GBP|Low: £10,644 GBP|High: £56,302 GBP|Avg: £27,817 GBP|-15.2%
Brilliance
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 29, 2026
Retailer 8£11,332 GBP
Retailer 3£14,041 GBP
Retailer 11£14,337 GBP
Retailer 10£17,105 GBP
Retailer 9£18,931 GBP
Retailer 7£20,845 GBP
Retailer 6£28,792 GBP
Brilliance£31,124 GBP
Retailer 5£32,761 GBP
Retailer 2£40,658 GBP
Retailer 12£44,132 GBP
Retailer 4£53,487 GBP

31 data points across 12 retailers

12 retailers£14,041 GBP to £31,124 GBP

Retailer 1
-
£11,332 GBP
$15,090 USD
Price last confirmed 11 days ago
B+
Retailer 2
-
£14,041 GBP
$18,698 USD
View
B+
Retailer 3
-
£14,337 GBP
$19,092 USD
View
B+
Retailer 4
-
£17,105 GBP
$22,778 USD
View
B+
Retailer 5
-
£18,931 GBP
$25,210 USD
View
Retailer 6
-
£20,845 GBP
View
Price last confirmed 7 days ago
B
Retailer 7
-
£28,792 GBP
View
Most Expensive
B
Brilliance
D42114110 · Oct 27
£31,124 GBP
$41,447 USD
View
7 more retailers have this diamond
Prices start from £14,041 GBPSave up to £17,083 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+
4.26ct Cushion
£14,041 GBP