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Cushion|Lab Grown|IGI

4.18ct D FL Cushion Lab Grown Diamond

EX • D/FL • IGI LG800677548

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG800677548

Diamond specifications and retailer prices

From £3,020 GBP
$4,047 USD
As of October 30, 2026
Save £15,824 GBP (84%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £18,845 GBP at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

About this 4.18ct lab-grown cushion diamond

This 4.18ct lab-grown cushion sits in the three to five carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG800677548 or 800677548. Listed at 10 retailers as of October 30, 2026, with prices from £3,020 to £18,845, a £15,824 spread on the same certified stone. Do Amore Diamonds lists it at £18,845. 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

4.18
Carat
D
Colour
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.8°
Pavilion angle33.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG800677548
Dimensions10.65 × 8.88 × 5.55 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
10.65 mm8.88 mm4.18 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG800677548
Side View
Table 60.0%Crown 35.8°Girdle: STK-THKPavilion 33.1°Culet: NoneDepth 62.5%

Caratlytics Score

How it works →
A+
Exceptional
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: £18,845 GBP|Low: £3,020 GBP|High: £24,136 GBP|Avg: £8,037 GBP|-21.9%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 31, 2026
Retailer 4£3,020 GBP
Retailer 7£3,291 GBP
Retailer 6£3,424 GBP
Retailer 11£4,170 GBP
Retailer 8£4,959 GBP
Retailer 2£6,011 GBP
Retailer 9£6,094 GBP
Retailer 10£7,923 GBP
Retailer 3£7,965 GBP
Retailer 5£9,665 GBP
Do Amore Diamonds£18,845 GBP

29 data points across 11 retailers

10 retailers£3,020 GBP to £18,845 GBP

A+
Cheapest Retailer
-
£3,020 GBP
$4,047 USD
A
Retailer 2
-
£3,291 GBP
$4,410 USD
View
A
Retailer 3
-
£3,424 GBP
$4,588 USD
View
A
Retailer 4
-
£4,170 GBP
$5,588 USD
View
Final sale: no returns
A
Retailer 5
-
£4,959 GBP
$6,644 USD
View
A
Retailer 6
-
£6,011 GBP
€7,671 EUR
View
Retailer 7
-
£6,094 GBP
$8,165 USD
View
Price last confirmed 13 days ago
Retailer 8
-
£7,923 GBP
View
Price last confirmed 10 days ago
B+
Retailer 9
-
£9,665 GBP
$12,950 USD
View
Most Expensive
B
Do Amore Diamonds
27-43D53E387 · Oct 31
£18,845 GBP
$25,250 USD
View
9 more retailers have this diamond
Prices start from £3,020 GBPSave up to £15,824 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+
4.18ct Cushion
£3,020 GBP