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Cushion|Lab Grown|IGI

5.39ct D FL Cushion Lab Grown Diamond

EX • D/FL • IGI LG817695377

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

Certificate IGI LG817695377

Diamond specifications and retailer prices

From £5,713 GBP
$7,655 USD
As of October 30, 2026
Save £23,041 GBP (80%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £28,754 GBP at With Clarity · As of October 31, 2026
View at With Clarity

About this 5.39ct lab-grown cushion diamond

This 5.39ct lab-grown cushion sits in the over five carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG817695377 or 817695377. Listed at 18 retailers as of October 30, 2026, with prices from £5,713 to £28,754, a £23,041 spread on the same certified stone. With Clarity lists it at £28,754. 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

5.39
Carat
D
Colour
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.3°
Pavilion angle35.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG817695377
Dimensions10.43 × 9.54 × 6.43 mm
L/W Ratio1.09
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
10.43 mm9.54 mm5.39 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG817695377
Side View
Table 58.0%Crown 34.3°Girdle: MED-THKPavilion 35.4°Culet: NoneDepth 67.4%

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: £12,418 GBP|Low: £5,713 GBP|High: £28,754 GBP|Avg: £12,578 GBP|-18.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
With Clarity
October 31, 2026
Retailer 3£5,713 GBP
Retailer 9£6,180 GBP
Retailer 2£6,362 GBP
Retailer 7£6,402 GBP
Retailer 6£7,415 GBP
Retailer 10£7,884 GBP
Retailer 15£7,993 GBP
Retailer 4£8,322 GBP
Retailer 5£9,167 GBP
Retailer 1£12,418 GBP
Retailer 14£12,638 GBP
Retailer 12£12,658 GBP
Retailer 11£12,884 GBP
Retailer 13£13,007 GBP
Retailer 8£21,440 GBP
Retailer 16£26,254 GBP
With Clarity£28,754 GBP

30 data points across 17 retailers

18 retailers£5,713 GBP to £28,754 GBP

A
Cheapest Retailer
-
£5,713 GBP
$7,655 USD
A
Retailer 2
-
£6,180 GBP
$8,281 USD
View
Final sale: no returns
A
Retailer 3
-
£6,362 GBP
$8,525 USD
View
Retailer 4
-
£6,402 GBP
$8,578 USD
View
Price last confirmed 15 days ago
A
Retailer 5
-
£7,415 GBP
$9,935 USD
View
A
Retailer 6
-
£7,884 GBP
View
Retailer 7
-
£7,993 GBP
$10,710 USD
View
Price last confirmed 13 days ago
A
Retailer 8
-
£8,322 GBP
$11,150 USD
View
A
Retailer 9
-
£9,167 GBP
View
A
Retailer 10
-
£11,887 GBP
$15,927 USD
View
B+
Retailer 11
-
£12,418 GBP
€15,847 EUR
View
B+
Retailer 12
-
£12,638 GBP
View
B+
Retailer 13
-
£12,658 GBP
$16,960 USD
View
B+
Retailer 14
-
£12,884 GBP
$17,263 USD
View
B+
Retailer 15
-
£13,007 GBP
ZAR 281,549 ZAR
View
B+
Retailer 16
-
£21,440 GBP
$28,727 USD
View
B
Retailer 17
-
£26,254 GBP
SGD 47,537 SGD
View
Most Expensive
B
With Clarity
817695377 · Oct 31
£28,754 GBP
$38,527 USD
View
17 more retailers have this diamond
Prices start from £5,713 GBPSave up to £23,041 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
5.39ct Cushion
£5,713 GBP