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Cushion|Lab Grown|IGI

1.55ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG825633207

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

Certificate IGI LG825633207

Diamond specifications and retailer prices

From £706 GBP
$948 USD
As of November 3, 2026
Save £3,005 GBP (81%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £3,711 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 LG825633207 or 825633207. Listed at 14 retailers as of November 2, 2026, with prices from £706 to £3,711, a £3,005 spread on the same certified stone. Brilliant Earth lists it at £3,711. 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 angle36.2°
Pavilion angle35.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG825633207
Dimensions6.62 × 6.59 × 4.16 mm
L/W Ratio1.00
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
6.62 mm6.59 mm1.55 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG825633207
Side View
Table 62.0%Crown 36.2°Girdle: STK-THKPavilion 35.6°Culet: NoneDepth 63.1%

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: Nov 3
Current: £1,125 GBP|Low: £706 GBP|High: £2,780 GBP|Avg: £1,610 GBP|+0.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 3, 2026
Retailer 11£706 GBP
Retailer 7£827 GBP
Retailer 9£864 GBP
Retailer 3£927 GBP
Retailer 2£1,047 GBP
Retailer 1£1,125 GBP
Retailer 6£1,283 GBP
Retailer 5£1,345 GBP
Retailer 10£2,290 GBP
Retailer 12£2,428 GBP
Retailer 4£2,537 GBP
Retailer 8£2,744 GBP

40 data points across 12 retailers

14 retailers£706 GBP to £3,711 GBP

A
Cheapest Retailer
-
£706 GBP
$948 USD
Final sale: no returns
A
Retailer 2
-
£827 GBP
View
A
Retailer 3
-
£864 GBP
$1,160 USD
View
A
Retailer 4
-
£927 GBP
$1,244 USD
View
A
Retailer 5
-
£1,047 GBP
$1,405 USD
View
A
Retailer 6
-
£1,125 GBP
View
B+
Retailer 7
-
£1,283 GBP
€1,640 EUR
View
B+
Retailer 8
-
£1,345 GBP
ZAR 29,158 ZAR
View
Retailer 9
-
£2,023 GBP
$2,715 USD
View
Price last confirmed 12 days ago
B
Retailer 10
-
£2,290 GBP
$3,073 USD
View
B
Retailer 11
-
£2,428 GBP
$3,258 USD
View
B
Retailer 12
-
£2,537 GBP
$3,405 USD
View
B
Retailer 13
-
£2,744 GBP
View
Most Expensive
B
Brilliant Earth
22411121A · Nov 2
£3,711 GBP
$4,980 USD
View
13 more retailers have this diamond
Prices start from £706 GBPSave up to £3,005 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
£706 GBP