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Cushion|Lab Grown|IGI

1.03ct D IF Cushion Lab Grown Diamond

ID • D/IF • IGI LG689561855

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG689561855

Diamond specifications and retailer prices

From £218 GBP
As of November 3, 2026
Save £1,167 GBP (84%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £1,385 GBP at Brilliant Earth · As of November 4, 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 IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG689561855 or 689561855. Listed at 18 retailers as of November 3, 2026, with prices from £218 to £1,385, a £1,167 spread on the same certified stone. Brilliant Earth lists it at £1,385. 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
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.4°
Pavilion angle38.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG689561855
Dimensions6.99 × 5.34 × 3.68 mm
L/W Ratio1.31
Girdle conditionFaceted
Culet sizePointed
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
6.99 mm5.34 mm1.03 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG689561855
Side View
Table 62.0%Crown 36.4°Girdle: STK-THKPavilion 38.7°Culet: NoneDepth 68.9%

Caratlytics Score

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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: Nov 3
Current: £1,385 GBP|Low: £216 GBP|High: £1,800 GBP|Avg: £638 GBP|-23.0%
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 4, 2026
Retailer 11£218 GBP
Retailer 3£242 GBP
Retailer 14£374 GBP
Retailer 4£403 GBP
Retailer 13£409 GBP
Retailer 10£417 GBP
Retailer 15£422 GBP
Retailer 2£459 GBP
Retailer 8£594 GBP
Retailer 9£653 GBP
Retailer 6£816 GBP
Retailer 12£970 GBP
Retailer 5£1,034 GBP
Retailer 7£1,075 GBP
Brilliant Earth£1,385 GBP

38 data points across 15 retailers

18 retailers£218 GBP to £1,385 GBP

A+
Cheapest Retailer
-
£218 GBP
Final sale: no returns
Retailer 2
-
£242 GBP
View
Price last confirmed 10 days ago
A
Retailer 3
-
£374 GBP
View
A
Retailer 4
-
£403 GBP
View
A
Retailer 5
-
£409 GBP
View
A
Retailer 6
-
£417 GBP
View
A
Retailer 7
-
£422 GBP
View
A
Retailer 8
-
£436 GBP
View
A
Retailer 9
-
£459 GBP
View
A
Retailer 10
-
£594 GBP
View
B+
Retailer 11
-
£653 GBP
View
B+
Retailer 12
-
£816 GBP
View
B+
Retailer 13
-
£896 GBP
View
B+
Retailer 14
-
£970 GBP
View
Retailer 15
-
£982 GBP
View
Price last confirmed 65 days ago
B
Retailer 16
-
£1,034 GBP
View
Retailer 17
-
£1,075 GBP
View
Price last confirmed 30 days ago
Most Expensive
B
Brilliant Earth
14715268A · Nov 4
£1,385 GBP
$1,870 USD
View
17 more retailers have this diamond
Prices start from £218 GBPSave up to £1,167 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
£218 GBP