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Cushion|Lab Grown|IGI

1.15ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG846663371

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG846663371

Diamond specifications and retailer prices

From £348 GBP
As of October 30, 2026
Save £1,160 GBP (77%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £1,508 GBP at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.15ct lab-grown cushion diamond

This 1.15ct 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 LG846663371 or 846663371. Listed at 7 retailers as of October 30, 2026, with prices from £348 to £1,508, a £1,160 spread on the same certified stone. Brilliant Earth lists it at £1,508. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.15
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.4°
Pavilion angle33.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG846663371
Dimensions7.86 × 5.18 × 3.60 mm
L/W Ratio1.52
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
7.86 mm5.18 mm1.15 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG846663371
Side View
Table 62.0%Crown 37.4°Girdle: MED-THKPavilion 33.5°Culet: NoneDepth 69.5%

Caratlytics Score

How it works →
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 30
Current: £1,508 GBP|Low: £348 GBP|High: £1,584 GBP|Avg: £794 GBP|-1.5%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 31, 2026
Retailer 6£348 GBP
Retailer 3£448 GBP
Retailer 5£539 GBP
Retailer 2£572 GBP
Retailer 7£652 GBP
Retailer 4£1,355 GBP
Brilliant Earth£1,508 GBP

5 data points across 7 retailers

7 retailers£348 GBP to £1,508 GBP

A
Cheapest Retailer
-
£348 GBP
A
Retailer 2
-
£448 GBP
$600 USD
View
A
Retailer 3
-
£539 GBP
$722 USD
View
A
Retailer 4
-
£572 GBP
$766 USD
View
A
Retailer 5
-
£652 GBP
€832 EUR
View
B+
Retailer 6
-
£1,355 GBP
$1,816 USD
View
Most Expensive
B
Brilliant Earth
22319601A · Oct 31
£1,508 GBP
$2,020 USD
View
6 more retailers have this diamond
Prices start from £348 GBPSave up to £1,160 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
1.15ct Cushion
£348 GBP