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Cushion|Lab Grown|IGI

5.31ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG768630668

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG768630668

Diamond specifications and retailer prices

From £6,318 GBP
$8,466 USD
As of November 1, 2026
Save £22,653 GBP (78%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £28,971 GBP at With Clarity · As of October 31, 2026
View at With Clarity

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 LG768630668 or 768630668. Listed at 14 retailers as of October 31, 2026, with prices from £6,318 to £28,971, a £22,653 spread on the same certified stone. With Clarity lists it at £28,971. 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°
Pavilion angle36°
OriginLab Grown
Grading LabIGI
CertificateIGI LG768630668
Dimensions11.53 × 9.47 × 6.29 mm
L/W Ratio1.22
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
11.53 mm9.47 mm5.31 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG768630668
Side View
Table 60.0%Crown 36°Girdle: MED-STKPavilion 36°Culet: NoneDepth 66.4%

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: Nov 1
Current: £8,591 GBP|Low: £6,318 GBP|High: £29,614 GBP|Avg: £14,346 GBP|-17.3%
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
With Clarity
November 1, 2026
Retailer 8£6,318 GBP
Retailer 5£7,633 GBP
Retailer 13£7,767 GBP
Retailer 3£8,016 GBP
Retailer 7£8,353 GBP
Retailer 1£8,591 GBP
Retailer 6£11,931 GBP
Retailer 10£12,471 GBP
Retailer 9£13,032 GBP
Retailer 2£13,314 GBP
Retailer 12£14,475 GBP
Retailer 4£20,053 GBP
Retailer 11£22,924 GBP
With Clarity£28,971 GBP

39 data points across 14 retailers

14 retailers£6,318 GBP to £28,971 GBP

A
Cheapest Retailer
-
£6,318 GBP
$8,466 USD
A
Retailer 2
-
£7,633 GBP
$10,227 USD
View
A
Retailer 3
-
£7,767 GBP
HK$81,300 HKD
View
Retailer 4
-
£8,016 GBP
$10,740 USD
View
Price last confirmed 13 days ago
A
Retailer 5
-
£8,353 GBP
$11,192 USD
View
A
Retailer 6
-
£8,591 GBP
View
A
Retailer 7
-
£11,931 GBP
€15,225 EUR
View
B+
Retailer 8
-
£12,471 GBP
$16,710 USD
View
B+
Retailer 9
-
£13,032 GBP
$17,461 USD
View
B+
Retailer 10
-
£13,314 GBP
View
B+
Retailer 11
-
£14,475 GBP
ZAR 313,328 ZAR
View
B
Retailer 12
-
£20,053 GBP
$26,869 USD
View
B
Retailer 13
-
£22,924 GBP
$30,715 USD
View
Most Expensive
B
With Clarity
768630668 · Oct 31
£28,971 GBP
$38,818 USD
View
13 more retailers have this diamond
Prices start from £6,318 GBPSave up to £22,653 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
£6,318 GBP