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Cushion|Lab Grown|GIA

4.21ct D FL Cushion Lab Grown Diamond

EX • D/FL • GIA 6532034794

Certificate GIA 6532034794

Diamond specifications and retailer prices

From £6,300 GBP
$8,441 USD
As of October 31, 2026
Save £20,009 GBP (76%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £26,308 GBP at Taylor and Hart · As of October 30, 2026
View at Taylor and Hart

About this 4.21ct lab-grown cushion diamond

This 4.21ct 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 6532034794. Listed at 12 retailers as of October 30, 2026, with prices from £6,300 to £26,308, a £20,009 spread on the same certified stone. Taylor and Hart lists it at £26,308. 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

4.21
Carat
D
Colour
FL
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabGIA
CertificateGIA 6532034794
Dimensions9.39 × 9.36 × 6.29 mm
L/W Ratio1.00
Top View
9.39 mm9.36 mm4.21 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6532034794
Side View
Table 59.0%CrownGirdle: STK-STKPavilionCulet: NoneDepth 67.2%

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 31
Current: £14,109 GBP|Low: £6,300 GBP|High: £89,873 GBP|Avg: £20,647 GBP|-23.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Taylor and Hart
October 30, 2026
Retailer 7£6,300 GBP
Retailer 3£6,468 GBP
Retailer 8£6,685 GBP
Retailer 11£7,579 GBP
Retailer 9£7,655 GBP
Retailer 6£8,554 GBP
Retailer 2£8,789 GBP
Retailer 5£13,647 GBP
Retailer 1£14,109 GBP
Retailer 12£16,501 GBP
Taylor and Hart£26,308 GBP
Retailer 10£41,175 GBP
Retailer 4£89,873 GBP

28 data points across 13 retailers

12 retailers£6,300 GBP to £26,308 GBP

A
Cheapest Retailer
-
£6,300 GBP
$8,441 USD
Retailer 2
-
£6,468 GBP
$8,667 USD
View
Price last confirmed 55 days ago
A
Retailer 3
-
£6,685 GBP
$8,957 USD
View
B+
Retailer 4
-
£7,579 GBP
$10,155 USD
View
Retailer 5
-
£7,655 GBP
$10,257 USD
View
Price last confirmed 15 days ago
A
Retailer 6
-
£8,554 GBP
$11,462 USD
View
B+
Retailer 7
-
£8,789 GBP
HK$92,000 HKD
View
B+
Retailer 8
-
£13,647 GBP
View
B+
Retailer 9
-
£14,109 GBP
$18,904 USD
View
B+
Retailer 10
-
£16,501 GBP
$22,110 USD
View
Most Expensive
B
Taylor and Hart
3ZW3EUB · Oct 30
£26,308 GBP
$35,250 USD
View
10 more retailers have this diamond
Prices start from £6,300 GBPSave up to £20,009 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
4.21ct Cushion
£6,300 GBP