CaratHunter
Plans
Cushion|Lab Grown|IGI

3.09ct E IF Cushion Lab Grown Diamond

EX • E/IF • IGI LG756522143

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG756522143

Diamond specifications and retailer prices

From £1,154 GBP
$1,546 USD
As of October 29, 2026
Save £6,518 GBP (85%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £7,672 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 3.09ct lab-grown cushion diamond

This 3.09ct lab-grown cushion sits in the three to five carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG756522143 or 756522143. Listed at 17 retailers as of October 29, 2026, with prices from £1,154 to £7,672, a £6,518 spread on the same certified stone. Brilliant Earth lists it at £7,672. 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

3.09
Carat
E
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.8°
Pavilion angle35.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG756522143
Dimensions7.30 × 7.30 × 4.93 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.30 mm7.30 mm3.09 ctE / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG756522143
Side View
Table 65.0%Crown 35.8°Girdle: MED-THKPavilion 35.9°Culet: NoneDepth 67.5%

Caratlytics Score

How it works →
A
Excellent
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: £7,672 GBP|Low: £1,154 GBP|High: £7,911 GBP|Avg: £2,921 GBP|-0.1%
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
Retailer 16
Retailer 17
October 30, 2026
Retailer 4£1,154 GBP
Retailer 8£1,235 GBP
Retailer 16£1,325 GBP
Retailer 14£1,362 GBP
Retailer 2£1,686 GBP
Retailer 7£1,767 GBP
Retailer 11£2,164 GBP
Retailer 17£2,373 GBP
Retailer 13£2,704 GBP
Retailer 10£2,775 GBP
Retailer 5£2,889 GBP
Retailer 3£3,221 GBP
Retailer 12£3,431 GBP
Retailer 15£3,702 GBP
Retailer 6£4,202 GBP
Retailer 9£5,870 GBP
Brilliant Earth£7,672 GBP

36 data points across 17 retailers

17 retailers£1,154 GBP to £7,672 GBP

A
Cheapest Retailer
-
£1,154 GBP
$1,546 USD
Final sale: no returns
Retailer 2
-
£1,235 GBP
$1,655 USD
View
Price last confirmed 17 days ago
A
Retailer 3
-
£1,325 GBP
$1,775 USD
View
A
Retailer 4
-
£1,362 GBP
$1,825 USD
View
A
Retailer 5
-
£1,686 GBP
View
A
Retailer 6
-
£1,767 GBP
$2,368 USD
View
A
Retailer 7
-
£2,164 GBP
€2,761 EUR
View
A
Retailer 8
-
£2,373 GBP
$3,179 USD
View
Retailer 9
-
£2,704 GBP
A$5,573 AUD
View
Price last confirmed 8 days ago
A
Retailer 10
-
£2,775 GBP
ZAR 60,072 ZAR
View
A
Retailer 11
-
£2,889 GBP
View
A
Retailer 12
-
£3,221 GBP
$4,316 USD
View
B+
Retailer 13
-
£3,431 GBP
View
B+
Retailer 14
-
£3,702 GBP
$4,961 USD
View
B+
Retailer 15
-
£4,202 GBP
$5,630 USD
View
Retailer 16
-
£5,870 GBP
A$12,100 AUD
View
Price last confirmed 21 days ago
Most Expensive
B
Brilliant Earth
17439238A · Oct 29
£7,672 GBP
$10,280 USD
View
16 more retailers have this diamond
Prices start from £1,154 GBPSave up to £6,518 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
3.09ct Cushion
£1,154 GBP