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Cushion|Lab Grown|IGI

5.57ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG799640078

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG799640078

Diamond specifications and retailer prices

From £7,466 GBP
$10,003 USD
As of October 30, 2026
Save £19,087 GBP (72%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £26,553 GBP at Taylor and Hart · As of October 31, 2026
View at Taylor and Hart

About this 5.57ct lab-grown cushion diamond

This 5.57ct 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 LG799640078 or 799640078. Listed at 13 retailers as of October 30, 2026, with prices from £7,466 to £26,553, a £19,087 spread on the same certified stone. Taylor and Hart lists it at £26,553. 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

5.57
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.6°
Pavilion angle27.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG799640078
Dimensions12.46 × 9.12 × 5.50 mm
L/W Ratio1.37
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
12.46 mm9.12 mm5.57 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG799640078
Side View
Table 62.0%Crown 32.6°Girdle: STK-THKPavilion 27.9°Culet: NoneDepth 60.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £10,155 GBP|Low: £6,213 GBP|High: £26,553 GBP|Avg: £13,189 GBP|-6.8%
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
Taylor and Hart
October 31, 2026
Retailer 5£6,213 GBP
Retailer 12£7,466 GBP
Retailer 13£8,246 GBP
Retailer 2£8,441 GBP
Retailer 8£8,541 GBP
Retailer 9£9,119 GBP
Retailer 1£10,155 GBP
Retailer 4£12,238 GBP
Retailer 7£13,795 GBP
Retailer 11£15,787 GBP
Retailer 6£17,354 GBP
Retailer 10£21,872 GBP
Retailer 3£23,796 GBP
Taylor and Hart£26,553 GBP

41 data points across 14 retailers

13 retailers£7,466 GBP to £26,553 GBP

A
Cheapest Retailer
-
£7,466 GBP
$10,003 USD
A
Retailer 2
-
£8,246 GBP
$11,049 USD
View
Final sale: no returns
A
Retailer 3
-
£8,441 GBP
$11,310 USD
View
Retailer 4
-
£8,541 GBP
$11,444 USD
View
Price last confirmed 15 days ago
A
Retailer 5
-
£9,119 GBP
$12,218 USD
View
A
Retailer 6
-
£10,155 GBP
View
A
Retailer 7
-
£12,238 GBP
View
B+
Retailer 8
-
£13,795 GBP
View
B+
Retailer 9
-
£15,787 GBP
$21,153 USD
View
B+
Retailer 10
-
£17,354 GBP
ZAR 375,648 ZAR
View
B
Retailer 11
-
£21,872 GBP
$29,306 USD
View
B
Retailer 12
-
£23,796 GBP
$31,883 USD
View
Most Expensive
B
Taylor and Hart
OFZ7J5I · Oct 31
£26,553 GBP
$35,578 USD
View
12 more retailers have this diamond
Prices start from £7,466 GBPSave up to £19,087 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
5.57ct Cushion
£7,466 GBP