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Cushion|Lab Grown|IGI

6.47ct D IF Cushion Lab Grown Diamond

ID • D/IF • IGI LG660415018

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG660415018

Diamond specifications and retailer prices

From £11,701 GBP
$15,678 USD
As of October 30, 2026
Save £30,792 GBP (72%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £42,493 GBP at Wholesale Diamonds Direct · As of October 27, 2026
View at Wholesale Diamonds Direct

About this 6.47ct lab-grown cushion diamond

This 6.47ct lab-grown cushion sits in the over five carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG660415018 or 660415018. Listed at 19 retailers as of October 27, 2026, with prices from £11,701 to £42,493, a £30,792 spread on the same certified stone. Wholesale Diamonds Direct lists it at £42,493. 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

6.47
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.7°
Pavilion angle35.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG660415018
Dimensions12.28 × 10.24 × 6.62 mm
L/W Ratio1.20
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
12.28 mm10.24 mm6.47 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG660415018
Side View
Table 58.0%Crown 35.7°Girdle: MED-STKPavilion 35.8°Culet: NoneDepth 64.6%

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: £25,845 GBP|Low: £9,202 GBP|High: £56,866 GBP|Avg: £22,762 GBP|+2.9%
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
Wholesale Diamonds Direct
October 31, 2026
Retailer 2£10,195 GBP
Retailer 5£11,701 GBP
Retailer 8£12,967 GBP
Retailer 14£13,632 GBP
Retailer 11£16,418 GBP
Retailer 7£16,800 GBP
Retailer 9£20,263 GBP
Retailer 6£21,793 GBP
Retailer 12£23,472 GBP
Retailer 3£25,630 GBP
Retailer 1£25,845 GBP
Retailer 13£28,564 GBP
Retailer 10£29,432 GBP
Wholesale Diamonds Direct£42,493 GBP
Retailer 4£56,866 GBP

38 data points across 15 retailers

19 retailers£11,701 GBP to £42,493 GBP

Retailer 1
-
£10,195 GBP
$13,660 USD
Our latest check could not confirm this price
A
Retailer 2
-
£11,701 GBP
$15,678 USD
View
A
Retailer 3
-
£12,967 GBP
$17,375 USD
View
A
Retailer 4
-
£13,632 GBP
$18,265 USD
View
B+
Retailer 5
-
£14,300 GBP
$19,160 USD
View
B+
Retailer 6
-
£16,418 GBP
$21,998 USD
View
Final sale: no returns
B+
Retailer 7
-
£16,800 GBP
View
B+
Retailer 8
-
£20,263 GBP
$27,150 USD
View
B+
Retailer 9
-
£21,793 GBP
View
B+
Retailer 10
-
£23,472 GBP
View
Retailer 11
-
£25,630 GBP
A$52,833 AUD
View
Price last confirmed 23 days ago
B+
Retailer 12
-
£25,845 GBP
€32,980 EUR
View
Retailer 13
-
£28,564 GBP
A$58,881 AUD
View
Price last confirmed 9 days ago
B+
Retailer 14
-
£29,432 GBP
ZAR 637,088 ZAR
View
B
Retailer 15
-
£37,003 GBP
$49,580 USD
View
B
Retailer 16
-
£37,917 GBP
$50,804 USD
View
Most Expensive
B
Wholesale Diamonds Direct
113194995 · Oct 27
£42,493 GBP
$56,936 USD
View
16 more retailers have this diamond
Prices start from £11,701 GBPSave up to £30,792 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
6.47ct Cushion
£11,701 GBP