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Cushion|Lab Grown|IGI

2.85ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG780665471

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

Certificate IGI LG780665471

Diamond specifications and retailer prices

From £1,193 GBP
$1,589 USD
As of October 29, 2026
Save £7,292 GBP (86%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £8,486 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 2.85ct lab-grown cushion diamond

This 2.85ct lab-grown cushion sits in the two to three carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG780665471 or 780665471. Listed at 11 retailers as of October 29, 2026, with prices from £1,193 to £8,486, a £7,292 spread on the same certified stone. Brilliant Earth lists it at £8,486. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

2.85
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.2°
Pavilion angle38.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG780665471
Dimensions8.27 × 8.16 × 5.45 mm
L/W Ratio1.01
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
8.27 mm8.16 mm2.85 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG780665471
Side View
Table 57.0%Crown 34.2°Girdle: STK-VTKPavilion 38.4°Culet: NoneDepth 66.8%

Caratlytics Score

How it works →
A+
Exceptional
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 29
Current: £8,486 GBP|Low: £1,193 GBP|High: £9,867 GBP|Avg: £3,749 GBP|-2.9%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 29, 2026
Retailer 7£1,193 GBP
Retailer 5£1,213 GBP
Retailer 6£1,715 GBP
Retailer 3£1,796 GBP
Retailer 11£1,924 GBP
Retailer 2£2,030 GBP
Retailer 9£3,044 GBP
Retailer 4£3,859 GBP
Retailer 10£4,498 GBP
Retailer 8£8,283 GBP
Brilliant Earth£8,486 GBP

31 data points across 11 retailers

11 retailers£1,193 GBP to £8,486 GBP

A+
Cheapest Retailer
-
£1,193 GBP
$1,589 USD
A
Retailer 2
-
£1,213 GBP
$1,615 USD
View
A
Retailer 3
-
£1,715 GBP
$2,284 USD
View
A
Retailer 4
-
£1,796 GBP
$2,392 USD
View
Final sale: no returns
A
Retailer 5
-
£1,924 GBP
$2,562 USD
View
A
Retailer 6
-
£2,030 GBP
€2,575 EUR
View
A
Retailer 7
-
£3,044 GBP
$4,053 USD
View
B+
Retailer 8
-
£3,859 GBP
View
Retailer 9
-
£4,498 GBP
$5,990 USD
View
Price last confirmed 8 days ago
B
Retailer 10
-
£8,283 GBP
$11,030 USD
View
Most Expensive
B
Brilliant Earth
18577401Y · Oct 29
£8,486 GBP
$11,300 USD
View
10 more retailers have this diamond
Prices start from £1,193 GBPSave up to £7,292 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+
2.85ct Cushion
£1,193 GBP