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Cushion|Lab Grown|IGI

1.55ct D FL Cushion Lab Grown Diamond

EX • D/FL • IGI LG743593779

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG743593779

Diamond specifications and retailer prices

From £665 GBP
$893 USD
As of November 2, 2026
Save £2,293 GBP (78%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £2,958 GBP at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

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 LG743593779 or 743593779. Listed at 14 retailers as of November 2, 2026, with prices from £665 to £2,958, a £2,293 spread on the same certified stone. Brilliant Earth lists it at £2,958. 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.3°
Pavilion angle38.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG743593779
Dimensions6.83 × 6.71 × 4.38 mm
L/W Ratio1.02
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
6.83 mm6.71 mm1.55 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG743593779
Side View
Table 60.0%Crown 37.3°Girdle: MED-THKPavilion 38.1°Culet: NoneDepth 65.3%

Caratlytics Score

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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: Nov 2
Current: £2,958 GBP|Low: £665 GBP|High: £3,659 GBP|Avg: £1,601 GBP|-19.1%
Brilliant Earth
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
November 3, 2026
Retailer 3£665 GBP
Retailer 13£719 GBP
Retailer 10£763 GBP
Retailer 4£876 GBP
Retailer 2£928 GBP
Retailer 8£946 GBP
Retailer 7£1,066 GBP
Retailer 14£1,474 GBP
Retailer 12£1,793 GBP
Retailer 11£2,023 GBP
Retailer 6£2,086 GBP
Retailer 5£2,210 GBP
Retailer 9£2,458 GBP
Brilliant Earth£2,958 GBP

40 data points across 14 retailers

14 retailers£665 GBP to £2,958 GBP

A
Cheapest Retailer
-
£665 GBP
$893 USD
A
Retailer 2
-
£719 GBP
$965 USD
View
A
Retailer 3
-
£763 GBP
HK$8,000 HKD
View
A
Retailer 4
-
£876 GBP
$1,175 USD
View
A
Retailer 5
-
£928 GBP
View
A
Retailer 6
-
£946 GBP
€1,209 EUR
View
A
Retailer 7
-
£1,066 GBP
ZAR 23,112 ZAR
View
Retailer 8
-
£1,474 GBP
$1,978 USD
View
Price last confirmed 7 days ago
B+
Retailer 9
-
£1,793 GBP
$2,406 USD
View
Retailer 10
-
£2,023 GBP
$2,715 USD
View
Price last confirmed 12 days ago
B
Retailer 11
-
£2,086 GBP
$2,799 USD
View
B
Retailer 12
-
£2,210 GBP
SGD 4,008 SGD
View
B
Retailer 13
-
£2,458 GBP
View
Most Expensive
B
Brilliant Earth
17456892Y · Nov 2
£2,958 GBP
$3,970 USD
View
13 more retailers have this diamond
Prices start from £665 GBPSave up to £2,293 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
1.55ct Cushion
£665 GBP