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Cushion|Lab Grown|IGI

6.18ct D IF Cushion Lab Grown Diamond

EX • D/IF • IGI LG754594320

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

Certificate IGI LG754594320

Diamond specifications and retailer prices

From £5,800 GBP
$7,771 USD
As of October 30, 2026
Save £29,472 GBP (84%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £35,272 GBP at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

About this 6.18ct lab-grown cushion diamond

This 6.18ct 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 LG754594320 or 754594320. Listed at 13 retailers as of October 30, 2026, with prices from £5,800 to £35,272, a £29,472 spread on the same certified stone. Do Amore Diamonds lists it at £35,272. 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

6.18
Carat
D
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.9°
Pavilion angle39°
OriginLab Grown
Grading LabIGI
CertificateIGI LG754594320
Dimensions10.87 × 10.50 × 7.01 mm
L/W Ratio1.04
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
10.87 mm10.50 mm6.18 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG754594320
Side View
Table 61.0%Crown 33.9°Girdle: STK-THKPavilion 39°Culet: NoneDepth 66.8%

Caratlytics Score

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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: £35,272 GBP|Low: £5,067 GBP|High: £39,526 GBP|Avg: £17,489 GBP|-10.8%
Do Amore Diamonds
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
Retailer 17
October 31, 2026
Retailer 13£5,800 GBP
Retailer 5£6,480 GBP
Retailer 14£6,512 GBP
Retailer 12£7,592 GBP
Retailer 17£7,922 GBP
Retailer 4£12,126 GBP
Retailer 2£12,331 GBP
Retailer 11£13,248 GBP
Retailer 10£13,292 GBP
Retailer 16£14,087 GBP
Retailer 8£14,809 GBP
Retailer 15£18,233 GBP
Retailer 3£24,483 GBP
Retailer 7£25,522 GBP
Retailer 9£31,699 GBP
Retailer 6£34,356 GBP
Do Amore Diamonds£35,272 GBP

32 data points across 17 retailers

13 retailers£5,800 GBP to £35,272 GBP

A
Cheapest Retailer
-
£5,800 GBP
$7,771 USD
A
Retailer 2
-
£6,480 GBP
$8,683 USD
View
Final sale: no returns
A
Retailer 3
-
£6,512 GBP
$8,725 USD
View
A
Retailer 4
-
£7,592 GBP
$10,173 USD
View
Retailer 5
-
£7,922 GBP
$10,615 USD
View
Price last confirmed 13 days ago
A
Retailer 6
-
£12,126 GBP
$16,248 USD
View
A
Retailer 7
-
£12,331 GBP
€15,735 EUR
View
A
Retailer 8
-
£13,248 GBP
View
A
Retailer 9
-
£13,292 GBP
$17,810 USD
View
Retailer 10
-
£14,087 GBP
A$29,039 AUD
View
Price last confirmed 9 days ago
B+
Retailer 11
-
£18,233 GBP
$24,430 USD
View
Retailer 12
-
£24,483 GBP
A$50,468 AUD
View
Price last confirmed 23 days ago
Most Expensive
B
Do Amore Diamonds
27-DCAF6E4E6 · Oct 31
£35,272 GBP
$47,260 USD
View
12 more retailers have this diamond
Prices start from £5,800 GBPSave up to £29,472 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
6.18ct Cushion
£5,800 GBP