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Cushion|Lab Grown|IGI

5.18ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG816608287

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG816608287

Diamond specifications and retailer prices

From £5,183 GBP
$6,945 USD
As of October 29, 2026
Save £26,088 GBP (83%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £31,271 GBP at Do Amore Diamonds · As of October 30, 2026
View at Do Amore Diamonds

About this 5.18ct lab-grown cushion diamond

This 5.18ct 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 LG816608287 or 816608287. Listed at 7 retailers as of October 29, 2026, with prices from £5,183 to £31,271, a £26,088 spread on the same certified stone. Do Amore Diamonds lists it at £31,271. 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

5.18
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.2°
Pavilion angle38.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816608287
Dimensions11.31 × 9.35 × 6.53 mm
L/W Ratio1.21
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
11.31 mm9.35 mm5.18 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG816608287
Side View
Table 58.0%Crown 35.2°Girdle: MED-THKPavilion 38.8°Culet: NoneDepth 69.8%

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 29
Current: £31,271 GBP|Low: £5,183 GBP|High: £42,442 GBP|Avg: £17,836 GBP|-13.4%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 30, 2026
Retailer 5£5,183 GBP
Retailer 3£5,862 GBP
Retailer 7£8,189 GBP
Retailer 4£10,263 GBP
Retailer 6£11,696 GBP
Retailer 2£12,165 GBP
Retailer 9£16,399 GBP
Do Amore Diamonds£31,271 GBP
Retailer 8£42,442 GBP

26 data points across 9 retailers

7 retailers£5,183 GBP to £31,271 GBP

A
Cheapest Retailer
-
£5,183 GBP
$6,945 USD
A
Retailer 2
-
£5,862 GBP
$7,855 USD
View
A
Retailer 3
-
£8,189 GBP
$10,973 USD
View
A
Retailer 4
-
£10,263 GBP
€13,097 EUR
View
A
Retailer 5
-
£11,696 GBP
View
B+
Retailer 6
-
£12,165 GBP
$16,300 USD
View
Most Expensive
B
Do Amore Diamonds
27-E42EC17CA · Oct 30
£31,271 GBP
$41,900 USD
View
6 more retailers have this diamond
Prices start from £5,183 GBPSave up to £26,088 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
5.18ct Cushion
£5,183 GBP