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Cushion|Lab Grown|IGI

4.30ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG780662187

Shape and cutting style on the report: Antique cushion cut

Certificate IGI LG780662187

Diamond specifications and retailer prices

From £3,139 GBP
$4,180 USD
As of October 29, 2026
Save £9,083 GBP (74%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £12,222 GBP at MOH London · As of October 29, 2026
View at MOH London

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 LG780662187 or 780662187. Listed at 10 retailers as of October 29, 2026, with prices from £3,139 to £12,222, a £9,083 spread on the same certified stone. MOH London lists it at £12,222. 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 angle37.2°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG780662187
Dimensions11.06 × 8.64 × 5.74 mm
L/W Ratio1.28
Girdle conditionFaceted
Culet sizeLarge
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
11.06 mm8.64 mm4.30 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG780662187
Side View
Table 56.0%Crown 37.2°Girdle: STK-THKPavilion 40.7°Culet: LargeDepth 66.4%

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 29
Current: £12,222 GBP|Low: £3,139 GBP|High: £26,952 GBP|Avg: £11,504 GBP|-4.0%
MOH London
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
October 30, 2026
Retailer 8£3,139 GBP
Retailer 15£4,758 GBP
Retailer 13£5,029 GBP
Retailer 3£5,357 GBP
Retailer 10£6,505 GBP
Retailer 11£6,557 GBP
Retailer 14£6,796 GBP
Retailer 9£6,962 GBP
Retailer 12£7,351 GBP
Retailer 6£9,271 GBP
Retailer 2£10,001 GBP
MOH London£12,222 GBP
Retailer 4£17,482 GBP
Retailer 7£22,612 GBP
Retailer 5£26,952 GBP

29 data points across 15 retailers

10 retailers£3,139 GBP to £12,222 GBP

A
Cheapest Retailer
-
£3,139 GBP
$4,180 USD
A
Retailer 2
-
£4,758 GBP
$6,336 USD
View
Final sale: no returns
A
Retailer 3
-
£5,029 GBP
$6,697 USD
View
A
Retailer 4
-
£6,505 GBP
$8,662 USD
View
A
Retailer 5
-
£6,557 GBP
$8,732 USD
View
B+
Retailer 6
-
£6,796 GBP
$9,050 USD
View
B+
Retailer 7
-
£6,962 GBP
€8,830 EUR
View
B+
Retailer 8
-
£7,351 GBP
$9,789 USD
View
B+
Retailer 9
-
£10,001 GBP
$13,318 USD
View
Most Expensive
B+
MOH London
LG780662187 · Oct 29
£12,222 GBP
View
9 more retailers have this diamond
Prices start from £3,139 GBPSave up to £9,083 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
£3,139 GBP