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Cushion|Lab Grown|IGI

1.55ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG778666726

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG778666726

Diamond specifications and retailer prices

From £3,555 GBP
$4,770 USD
As of November 2, 2026
Save £1,969 GBP (36%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £7,851 GBP at MOH London · As of November 3, 2026
View at MOH London

About this 1.55ct lab-grown cushion diamond

This 1.55ct lab-grown cushion sits in the one-and-a-half to two carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG778666726 or 778666726. Listed at 13 retailers as of November 1, 2026, with a 55% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.55
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle30.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG778666726
Dimensions8.42 × 5.54 × 3.87 mm
L/W Ratio1.52
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.42 mm5.54 mm1.55 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG778666726
Side View
Table 62.0%Crown 34.9°Girdle: STK-VTKPavilion 30.8°Culet: NoneDepth 69.9%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: £7,851 GBP|Low: £2,858 GBP|High: £14,390 GBP|Avg: £6,972 GBP|-0.5%
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
November 3, 2026
Retailer 9£2,858 GBP
Retailer 10£3,555 GBP
Retailer 13£3,661 GBP
Retailer 6£4,286 GBP
Retailer 2£4,868 GBP
Retailer 12£5,338 GBP
Retailer 8£5,523 GBP
Retailer 7£6,969 GBP
Retailer 3£7,093 GBP
MOH London£7,851 GBP
Retailer 11£11,050 GBP
Retailer 5£13,020 GBP
Retailer 4£13,524 GBP

22 data points across 13 retailers

13 retailers£3,555 GBP to £5,523 GBP

Retailer 1
-
£2,858 GBP
$3,835 USD
Price last confirmed 12 days ago
B
Retailer 2
-
£3,555 GBP
$4,770 USD
View
B
Retailer 3
-
£3,661 GBP
$4,913 USD
View
Final sale: no returns
B
Retailer 4
-
£4,286 GBP
View
B
Retailer 5
-
£4,868 GBP
View
B
Retailer 6
-
£5,338 GBP
View
B
Retailer 7
-
£5,523 GBP
$7,412 USD
View
Retailer 8
-
£6,969 GBP
ZAR 151,090 ZAR
View
Price under review
Retailer 9
-
£7,093 GBP
$9,519 USD
View
Price under review
Most Expensive
MOH London
LG778666726 · Nov 3
£7,851 GBP
View
Price under review
9 more retailers have this diamond
Prices start from £3,555 GBPSave up to £1,969 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.

B
1.55ct Cushion
£3,555 GBP