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Cushion|Lab Grown|IGI

1.00ct E IF Cushion Lab Grown Diamond

ID • E/IF • IGI LG689562075

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG689562075

Diamond specifications and retailer prices

From £261 GBP
$347 USD
As of October 30, 2026
Save £1,084 GBP (81%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £1,344 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1ct lab-grown cushion diamond

This 1ct 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 LG689562075 or 689562075. Listed at 16 retailers as of October 29, 2026, with prices from £261 to £1,344, a £1,084 spread on the same certified stone. Brilliant Earth lists it at £1,344. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.00
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.4°
Pavilion angle35.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG689562075
Dimensions6.87 × 5.33 × 3.55 mm
L/W Ratio1.29
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
6.87 mm5.33 mm1.00 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG689562075
Side View
Table 59.0%Crown 36.4°Girdle: MED-THKPavilion 35.6°Culet: NoneDepth 66.6%

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: £1,344 GBP|Low: £258 GBP|High: £1,344 GBP|Avg: £667 GBP|+1.7%
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
October 30, 2026
Retailer 2£261 GBP
Retailer 3£289 GBP
Retailer 14£439 GBP
Retailer 15£443 GBP
Retailer 16£468 GBP
Retailer 5£470 GBP
Retailer 13£496 GBP
Retailer 9£514 GBP
Retailer 10£537 GBP
Retailer 12£730 GBP
Retailer 4£747 GBP
Retailer 7£964 GBP
Retailer 8£1,066 GBP
Retailer 6£1,161 GBP
Retailer 11£1,164 GBP
Brilliant Earth£1,344 GBP

39 data points across 16 retailers

16 retailers£261 GBP to £1,344 GBP

A
Cheapest Retailer
-
£261 GBP
$347 USD
Final sale: no returns
A
Retailer 2
-
£289 GBP
$385 USD
View
A
Retailer 3
-
£439 GBP
$585 USD
View
A
Retailer 4
-
£443 GBP
$590 USD
View
A
Retailer 5
-
£468 GBP
$623 USD
View
A
Retailer 6
-
£470 GBP
$626 USD
View
A
Retailer 7
-
£496 GBP
ZAR 10,680 ZAR
View
A
Retailer 8
-
£514 GBP
View
A
Retailer 9
-
£537 GBP
€681 EUR
View
B+
Retailer 10
-
£730 GBP
A$1,496 AUD
View
B+
Retailer 11
-
£747 GBP
$995 USD
View
B
Retailer 12
-
£964 GBP
$1,283 USD
View
B
Retailer 13
-
£1,087 GBP
$1,448 USD
View
B
Retailer 14
-
£1,161 GBP
$1,546 USD
View
B
Retailer 15
-
£1,164 GBP
View
Most Expensive
B
Brilliant Earth
15714260A · Oct 29
£1,344 GBP
$1,790 USD
View
15 more retailers have this diamond
Prices start from £261 GBPSave up to £1,084 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
1.00ct Cushion
£261 GBP