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Cushion|Lab Grown|IGI

5.31ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG780662902

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG780662902

Diamond specifications and retailer prices

From £5,755 GBP
$7,711 USD
As of October 30, 2026
Save £17,169 GBP (75%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £22,924 GBP at Taylor and Hart · As of October 30, 2026
View at Taylor and Hart

About this 5.31ct lab-grown cushion diamond

This 5.31ct 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 LG780662902 or 780662902. Listed at 14 retailers as of October 30, 2026, with prices from £5,755 to £22,924, a £17,169 spread on the same certified stone. Taylor and Hart lists it at £22,924. 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

5.31
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.4°
Pavilion angle35.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG780662902
Dimensions11.84 × 9.29 × 6.05 mm
L/W Ratio1.27
Girdle conditionFaceted
Culet sizePointed
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
11.84 mm9.29 mm5.31 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG780662902
Side View
Table 61.0%Crown 36.4°Girdle: MED-THKPavilion 35.8°Culet: NoneDepth 65.1%

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: £11,931 GBP|Low: £5,755 GBP|High: £23,889 GBP|Avg: £13,000 GBP|-16.0%
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 9£5,755 GBP
Retailer 8£6,152 GBP
Retailer 4£7,630 GBP
Retailer 3£7,754 GBP
Retailer 13£7,814 GBP
Retailer 6£8,591 GBP
Retailer 10£11,806 GBP
Retailer 1£11,931 GBP
Retailer 11£12,471 GBP
Retailer 2£13,314 GBP
Retailer 12£14,475 GBP
Retailer 7£17,736 GBP
Retailer 5£20,053 GBP
Taylor and Hart£22,924 GBP

39 data points across 14 retailers

14 retailers£5,755 GBP to £22,924 GBP

A
Cheapest Retailer
-
£5,755 GBP
$7,711 USD
A
Retailer 2
-
£6,152 GBP
$8,243 USD
View
A
Retailer 3
-
£7,630 GBP
$10,223 USD
View
Retailer 4
-
£7,754 GBP
$10,390 USD
View
Price last confirmed 13 days ago
A
Retailer 5
-
£7,814 GBP
HK$81,800 HKD
View
A
Retailer 6
-
£8,591 GBP
View
A
Retailer 7
-
£11,806 GBP
$15,819 USD
View
A
Retailer 8
-
£11,931 GBP
€15,225 EUR
View
B+
Retailer 9
-
£12,471 GBP
$16,710 USD
View
B+
Retailer 10
-
£13,314 GBP
View
B+
Retailer 11
-
£14,475 GBP
ZAR 313,328 ZAR
View
B+
Retailer 12
-
£17,736 GBP
$23,764 USD
View
B
Retailer 13
-
£20,053 GBP
$26,869 USD
View
Most Expensive
B
Taylor and Hart
J1NOSVH · Oct 30
£22,924 GBP
$30,715 USD
View
13 more retailers have this diamond
Prices start from £5,755 GBPSave up to £17,169 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
5.31ct Cushion
£5,755 GBP