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Cushion|Lab Grown|IGI

1.03ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG816624821

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

Certificate IGI LG816624821

Diamond specifications and retailer prices

From £281 GBP
$377 USD
As of October 30, 2026
Save £1,241 GBP (82%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £1,523 GBP at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 1.03ct lab-grown cushion diamond

This 1.03ct 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 LG816624821 or 816624821. Listed at 12 retailers as of October 30, 2026, with prices from £281 to £1,523, a £1,241 spread on the same certified stone. Brilliant Earth lists it at £1,523. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.03
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.1°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816624821
Dimensions6.07 × 5.98 × 3.84 mm
L/W Ratio1.02
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
6.07 mm5.98 mm1.03 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG816624821
Side View
Table 57.0%Crown 35.1°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 64.2%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £1,523 GBP|Low: £205 GBP|High: £2,000 GBP|Avg: £776 GBP|-23.9%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 30, 2026
Retailer 10£281 GBP
Retailer 9£459 GBP
Retailer 3£463 GBP
Retailer 11£504 GBP
Retailer 5£509 GBP
Retailer 7£537 GBP
Retailer 2£560 GBP
Retailer 4£1,022 GBP
Retailer 12£1,036 GBP
Retailer 8£1,218 GBP
Retailer 6£1,258 GBP
Brilliant Earth£1,523 GBP

36 data points across 12 retailers

12 retailers£281 GBP to £1,523 GBP

A
Cheapest Retailer
-
£281 GBP
$377 USD
Final sale: no returns
A
Retailer 2
-
£459 GBP
$615 USD
View
A
Retailer 3
-
£463 GBP
$620 USD
View
A
Retailer 4
-
£504 GBP
$675 USD
View
A
Retailer 5
-
£509 GBP
€649 EUR
View
A
Retailer 6
-
£537 GBP
ZAR 11,616 ZAR
View
A
Retailer 7
-
£560 GBP
View
Retailer 8
-
£1,022 GBP
$1,370 USD
View
Price last confirmed 12 days ago
B
Retailer 9
-
£1,036 GBP
$1,388 USD
View
B
Retailer 10
-
£1,218 GBP
$1,632 USD
View
B+
Retailer 11
-
£1,258 GBP
View
Most Expensive
B
Brilliant Earth
21018766A · Oct 30
£1,523 GBP
$2,040 USD
View
11 more retailers have this diamond
Prices start from £281 GBPSave up to £1,241 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
1.03ct Cushion
£281 GBP