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Cushion|Lab Grown|IGI

1.28ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG825660202

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG825660202

Diamond specifications and retailer prices

From £357 GBP
$479 USD
As of November 1, 2026
Save £1,478 GBP (81%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £1,836 GBP at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.28ct lab-grown cushion diamond

This 1.28ct lab-grown cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG825660202 or 825660202. Listed at 15 retailers as of October 31, 2026, with prices from £357 to £1,836, a £1,478 spread on the same certified stone. Brilliant Earth lists it at £1,836. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.28
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle30.9°
Pavilion angle34.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG825660202
Dimensions8.30 × 5.50 × 3.68 mm
L/W Ratio1.51
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
8.30 mm5.50 mm1.28 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG825660202
Side View
Table 61.0%Crown 30.9°Girdle: MED-THKPavilion 34.3°Culet: NoneDepth 66.9%

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 1
Current: £1,836 GBP|Low: £357 GBP|High: £2,149 GBP|Avg: £1,013 GBP|-10.9%
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
Retailer 15
November 2, 2026
Retailer 15£357 GBP
Retailer 12£384 GBP
Retailer 10£493 GBP
Retailer 9£602 GBP
Retailer 3£607 GBP
Retailer 2£626 GBP
Retailer 11£659 GBP
Retailer 13£675 GBP
Retailer 4£925 GBP
Retailer 6£1,239 GBP
Retailer 14£1,258 GBP
Retailer 5£1,333 GBP
Retailer 8£1,408 GBP
Retailer 7£1,479 GBP
Brilliant Earth£1,836 GBP

38 data points across 15 retailers

15 retailers£357 GBP to £1,836 GBP

A
Cheapest Retailer
-
£357 GBP
$479 USD
Final sale: no returns
Retailer 2
-
£384 GBP
$514 USD
View
Price last confirmed 7 days ago
A
Retailer 3
-
£493 GBP
$660 USD
View
A
Retailer 4
-
£602 GBP
€768 EUR
View
A
Retailer 5
-
£607 GBP
$813 USD
View
A
Retailer 6
-
£626 GBP
View
A
Retailer 7
-
£659 GBP
ZAR 14,267 ZAR
View
A
Retailer 8
-
£675 GBP
$905 USD
View
B+
Retailer 9
-
£925 GBP
$1,239 USD
View
Retailer 10
-
£1,239 GBP
$1,660 USD
View
Price last confirmed 18 days ago
B+
Retailer 11
-
£1,258 GBP
$1,686 USD
View
B+
Retailer 12
-
£1,333 GBP
SGD 2,413 SGD
View
B+
Retailer 13
-
£1,408 GBP
View
Retailer 14
-
£1,479 GBP
View
Price last confirmed 23 days ago
Most Expensive
B
Brilliant Earth
21434032A · Oct 31
£1,836 GBP
$2,460 USD
View
14 more retailers have this diamond
Prices start from £357 GBPSave up to £1,478 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
1.28ct Cushion
£357 GBP