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Cushion|Lab Grown|IGI

1.09ct E IF Cushion Lab Grown Diamond

EX • E/IF • IGI LG644488847

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG644488847

Diamond specifications and retailer prices

From £194 GBP
$260 USD
As of October 30, 2026
Save £1,237 GBP (86%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £1,431 GBP at Queensmith · As of October 27, 2026
View at Queensmith

About this 1.09ct lab-grown cushion diamond

This 1.09ct lab-grown cushion sits in the classic one-carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG644488847 or 644488847. Listed at 21 retailers as of October 27, 2026, with prices from £194 to £1,431, a £1,237 spread on the same certified stone. Queensmith lists it at £1,431. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.09
Carat
E
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.6°
Pavilion angle35.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG644488847
Dimensions5.57 × 5.57 × 3.50 mm
L/W Ratio1.00
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
5.57 mm5.57 mm1.09 ctE / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG644488847
Side View
Table 57.0%Crown 31.6°Girdle: MED-STKPavilion 35.6°Culet: NoneDepth 62.8%

Caratlytics Score

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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: £360 GBP|Low: £194 GBP|High: £1,276 GBP|Avg: £553 GBP|-0.6%
Retailer 1
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October 31, 2026
Retailer 7£194 GBP
Retailer 2£216 GBP
Retailer 18£239 GBP
Retailer 13£297 GBP
Retailer 1£360 GBP
Retailer 16£371 GBP
Retailer 3£391 GBP
Retailer 12£407 GBP
Retailer 5£486 GBP
Retailer 15£523 GBP
Retailer 17£526 GBP
Retailer 19£544 GBP
Retailer 8£582 GBP
Retailer 6£733 GBP
Retailer 9£749 GBP
Retailer 11£795 GBP
Retailer 14£869 GBP
Retailer 4£970 GBP
Retailer 10£1,276 GBP

39 data points across 19 retailers

21 retailers£194 GBP to £1,431 GBP

A
Cheapest Retailer
-
£194 GBP
$260 USD
Final sale: no returns
A
Retailer 2
-
£216 GBP
$289 USD
View
A
Retailer 3
-
£239 GBP
HK$2,500 HKD
View
A
Retailer 4
-
£297 GBP
$398 USD
View
A
Retailer 5
-
£360 GBP
€459 EUR
View
A
Retailer 6
-
£371 GBP
ZAR 8,023 ZAR
View
A
Retailer 7
-
£391 GBP
$524 USD
View
A
Retailer 8
-
£407 GBP
View
A
Retailer 9
-
£445 GBP
$596 USD
View
A
Retailer 10
-
£486 GBP
$651 USD
View
A
Retailer 11
-
£523 GBP
A$1,078 AUD
View
A
Retailer 12
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£526 GBP
A$1,085 AUD
View
A
Retailer 13
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£544 GBP
$729 USD
View
A
Retailer 14
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£582 GBP
SGD 1,054 SGD
View
B+
Retailer 15
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£733 GBP
$982 USD
View
B+
Retailer 16
-
£749 GBP
$1,003 USD
View
Retailer 17
-
£795 GBP
A$1,639 AUD
View
Price last confirmed 26 days ago
B+
Retailer 18
-
£869 GBP
View
B+
Retailer 19
-
£970 GBP
$1,299 USD
View
B
Retailer 20
-
£1,276 GBP
$1,710 USD
View
Most Expensive
B
Queensmith
LG644488847 · Oct 27
£1,431 GBP
View
20 more retailers have this diamond
Prices start from £194 GBPSave up to £1,237 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
1.09ct Cushion
£194 GBP