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Cushion|Lab Grown|IGI

1.03ct D FL Cushion Lab Grown Diamond

VG • D/FL • IGI LG840634759

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG840634759

Diamond specifications and retailer prices

From £343 GBP
$460 USD
As of October 25, 2026
Save £1,373 GBP (80%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £1,717 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 very-good cut grade and certified by IGI LG840634759 or 840634759. Listed at 13 retailers as of October 25, 2026, with prices from £343 to £1,717, a £1,373 spread on the same certified stone. Brilliant Earth lists it at £1,717. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.03
Carat
D
Colour
FL
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.6°
Pavilion angle38.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840634759
Dimensions7.36 × 5.18 × 3.47 mm
L/W Ratio1.42
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
7.36 mm5.18 mm1.03 ctD / FL
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG840634759
Side View
Table 66.0%Crown 32.6°Girdle: MED-THKPavilion 38.5°Culet: NoneDepth 67.0%

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: Oct 25
Current: £1,717 GBP|Low: £343 GBP|High: £1,717 GBP|Avg: £708 GBP
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 30, 2026
Retailer 10£343 GBP
Retailer 2£354 GBP
Retailer 12£468 GBP
Retailer 9£470 GBP
Retailer 3£549 GBP
Retailer 7£553 GBP
Retailer 8£590 GBP
Retailer 6£620 GBP
Retailer 4£911 GBP
Retailer 5£1,022 GBP
Retailer 13£1,132 GBP
Retailer 11£1,342 GBP
Brilliant Earth£1,717 GBP

14 data points across 13 retailers

13 retailers£343 GBP to £1,717 GBP

A
Cheapest Retailer
-
£343 GBP
$460 USD
A
Retailer 2
-
£354 GBP
View
A
Retailer 3
-
£468 GBP
$627 USD
View
A
Retailer 4
-
£470 GBP
$630 USD
View
A
Retailer 5
-
£549 GBP
$735 USD
View
A
Retailer 6
-
£553 GBP
€706 EUR
View
A
Retailer 7
-
£590 GBP
ZAR 12,761 ZAR
View
B+
Retailer 8
-
£620 GBP
View
B+
Retailer 9
-
£911 GBP
SGD 1,650 SGD
View
Retailer 10
-
£1,022 GBP
$1,370 USD
View
Price last confirmed 12 days ago
B
Retailer 11
-
£1,132 GBP
$1,517 USD
View
B
Retailer 12
-
£1,342 GBP
View
Most Expensive
B
Brilliant Earth
21861645A · Oct 30
£1,717 GBP
$2,300 USD
View
12 more retailers have this diamond
Prices start from £343 GBPSave up to £1,373 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
£343 GBP