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Cushion|Lab Grown|IGI

4.30ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG804664621

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG804664621

Diamond specifications and retailer prices

From £3,102 GBP
$4,122 USD
As of October 29, 2026
Save £16,555 GBP (84%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £19,657 GBP at Do Amore Diamonds · As of October 28, 2026
View at Do Amore Diamonds

About this 4.3ct lab-grown cushion diamond

This 4.3ct 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 LG804664621 or 804664621. Listed at 10 retailers as of October 28, 2026, with prices from £3,102 to £19,657, a £16,555 spread on the same certified stone. Do Amore Diamonds lists it at £19,657. 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

4.30
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.7°
Pavilion angle36.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG804664621
Dimensions10.59 × 8.70 × 5.81 mm
L/W Ratio1.22
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
10.59 mm8.70 mm4.30 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG804664621
Side View
Table 60.0%Crown 36.7°Girdle: STK-THKPavilion 36.1°Culet: NoneDepth 66.8%

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 29
Current: £19,657 GBP|Low: £3,102 GBP|High: £25,008 GBP|Avg: £8,743 GBP|-21.4%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 29, 2026
Retailer 7£3,102 GBP
Retailer 4£3,338 GBP
Retailer 8£3,638 GBP
Retailer 10£4,321 GBP
Retailer 6£5,136 GBP
Retailer 2£6,279 GBP
Retailer 11£6,571 GBP
Retailer 5£7,563 GBP
Retailer 3£11,321 GBP
Retailer 9£16,993 GBP
Do Amore Diamonds£19,657 GBP

24 data points across 11 retailers

10 retailers£3,102 GBP to £19,657 GBP

A+
Cheapest Retailer
-
£3,102 GBP
$4,122 USD
A
Retailer 2
-
£3,338 GBP
$4,435 USD
View
A
Retailer 3
-
£3,638 GBP
$4,834 USD
View
A
Retailer 4
-
£4,321 GBP
$5,742 USD
View
Final sale: no returns
A
Retailer 5
-
£5,136 GBP
$6,824 USD
View
A
Retailer 6
-
£6,279 GBP
€7,946 EUR
View
A
Retailer 7
-
£6,571 GBP
$8,732 USD
View
Price last confirmed 80 days ago
B+
Retailer 8
-
£7,563 GBP
View
B
Retailer 9
-
£16,993 GBP
$22,580 USD
View
Most Expensive
B
Do Amore Diamonds
27-647C695D3 · Oct 28
£19,657 GBP
$26,120 USD
View
9 more retailers have this diamond
Prices start from £3,102 GBPSave up to £16,555 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+
4.30ct Cushion
£3,102 GBP