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Cushion|Lab Grown|IGI

1.00ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG825639442

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG825639442

Diamond specifications and retailer prices

From £339 GBP
$454 USD
As of October 30, 2026
Save £1,602 GBP (83%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £1,940 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1ct lab-grown cushion diamond

This 1ct lab-grown cushion sits in the classic one-carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG825639442 or 825639442. Listed at 13 retailers as of October 29, 2026, with prices from £339 to £1,940, a £1,602 spread on the same certified stone. Brilliant Earth lists it at £1,940. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.00
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.7°
Pavilion angle36.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG825639442
Dimensions7.01 × 5.25 × 3.40 mm
L/W Ratio1.34
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
7.01 mm5.25 mm1.00 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG825639442
Side View
Table 58.0%Crown 31.7°Girdle: MED-STKPavilion 36.7°Culet: NoneDepth 64.8%

Caratlytics Score

How it works →
A+
Exceptional
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 30
Current: £1,940 GBP|Low: £339 GBP|High: £1,948 GBP|Avg: £727 GBP|-0.4%
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
October 31, 2026
Retailer 9£339 GBP
Retailer 10£388 GBP
Retailer 12£411 GBP
Retailer 5£412 GBP
Retailer 8£504 GBP
Retailer 7£541 GBP
Retailer 6£552 GBP
Retailer 2£617 GBP
Retailer 13£647 GBP
Retailer 4£705 GBP
Retailer 11£995 GBP
Retailer 3£1,516 GBP
Brilliant Earth£1,940 GBP

18 data points across 13 retailers

13 retailers£339 GBP to £1,940 GBP

A+
Cheapest Retailer
-
£339 GBP
$454 USD
Final sale: no returns
A
Retailer 2
-
£388 GBP
View
A
Retailer 3
-
£411 GBP
HK$4,300 HKD
View
A
Retailer 4
-
£412 GBP
$552 USD
View
A
Retailer 5
-
£504 GBP
$675 USD
View
A
Retailer 6
-
£541 GBP
$725 USD
View
A
Retailer 7
-
£552 GBP
$740 USD
View
A
Retailer 8
-
£617 GBP
View
B+
Retailer 9
-
£647 GBP
€826 EUR
View
B+
Retailer 10
-
£705 GBP
ZAR 15,269 ZAR
View
B+
Retailer 11
-
£995 GBP
SGD 1,801 SGD
View
B
Retailer 12
-
£1,516 GBP
View
Most Expensive
B
Brilliant Earth
21545788A · Oct 29
£1,940 GBP
$2,600 USD
View
12 more retailers have this diamond
Prices start from £339 GBPSave up to £1,602 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+
1.00ct Cushion
£339 GBP