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Cushion|Lab Grown|IGI

10.30ct E FL Cushion Lab Grown Diamond

ID • E/FL • IGI LG778694861

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG778694861

Diamond specifications and retailer prices

From £32,502 GBP
$43,188 USD
As of October 28, 2026
Save £3,983 GBP (11%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £36,485 GBP at Brilliant Earth · As of October 28, 2026
View at Brilliant Earth

About this 10.3ct lab-grown cushion diamond

This 10.3ct lab-grown cushion sits in the over five carat band, graded E colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG778694861 or 778694861. Listed at 6 retailers as of October 28, 2026, with a relatively tight 12% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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

10.30
Carat
E
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle30.8°
Pavilion angle38.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG778694861
Dimensions14.21 × 11.98 × 8.13 mm
L/W Ratio1.19
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
14.21 mm11.98 mm10.30 ctE / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG778694861
Side View
Table 59.0%Crown 30.8°Girdle: MED-STKPavilion 38.9°Culet: NoneDepth 67.9%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 28
Current: £36,485 GBP|Low: £15,172 GBP|High: £149,997 GBP|Avg: £63,899 GBP|-6.3%
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 18, 2026
Retailer 4£15,172 GBP
Retailer 7£32,502 GBP
Retailer 5£33,409 GBP
Retailer 2£35,336 GBP
Brilliant Earth£36,485 GBP
Retailer 3£46,343 GBP
Retailer 10£53,110 GBP
Retailer 11£67,830 GBP
Retailer 9£81,683 GBP
Retailer 12£94,389 GBP
Retailer 8£134,471 GBP
Retailer 6£149,997 GBP

9 data points across 12 retailers

6 retailers£32,502 GBP to £36,485 GBP

A
Cheapest Retailer
-
£32,502 GBP
$43,188 USD
Final sale: no returns
A
Retailer 2
-
£33,409 GBP
$44,392 USD
View
Returns within 30 days
A
Retailer 3
-
£35,336 GBP
$46,953 USD
View
Returns within 30 days
Most Expensive
A
Brilliant Earth
21399789Y · Oct 28
£36,485 GBP
$48,480 USD
View
Returns within 30 days
3 more retailers have this diamond
Prices start from £32,502 GBPSave up to £3,983 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
10.30ct Cushion
£32,502 GBP