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Cushion|Lab Grown|IGI

1.56ct F IF Cushion Lab Grown Diamond

ID • F/IF • IGI LG629494063

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG629494063

Diamond specifications and retailer prices

From £253 GBP
$340 USD
As of November 1, 2026
Save £955 GBP (79%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £1,364 GBP at Rare Carat · As of October 21, 2026
View at Rare Carat

About this 1.56ct lab-grown cushion diamond

This 1.56ct lab-grown cushion sits in the one-and-a-half to two carat band, graded F colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG629494063 or 629494063. Listed at 16 retailers as of November 1, 2026, with a 377% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.56
Carat
F
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.7°
Pavilion angle39.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG629494063
Dimensions6.53 × 6.53 × 4.48 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
6.53 mm6.53 mm1.56 ctF / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG629494063
Side View
Table 67.0%Crown 34.7°Girdle: MED-VTKPavilion 39.8°Culet: NoneDepth 68.6%

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: Nov 1
Current: £1,364 GBP|Low: £253 GBP|High: £1,367 GBP|Avg: £722 GBP|-0.3%
Rare Carat
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
November 2, 2026
Retailer 9£253 GBP
Retailer 2£297 GBP
Retailer 8£434 GBP
Retailer 14£436 GBP
Retailer 3£470 GBP
Retailer 16£482 GBP
Retailer 11£497 GBP
Retailer 10£513 GBP
Retailer 13£672 GBP
Retailer 15£797 GBP
Retailer 6£961 GBP
Retailer 4£1,107 GBP
Retailer 17£1,124 GBP
Retailer 7£1,135 GBP
Retailer 12£1,155 GBP
Retailer 5£1,209 GBP
Rare Carat£1,364 GBP

44 data points across 17 retailers

16 retailers£253 GBP to £1,209 GBP

A
Cheapest Retailer
-
£253 GBP
$340 USD
Final sale: no returns
A
Retailer 2
-
£297 GBP
View
A
Retailer 3
-
£436 GBP
$585 USD
View
A
Retailer 4
-
£470 GBP
$631 USD
View
A
Retailer 5
-
£482 GBP
$647 USD
View
A
Retailer 6
-
£497 GBP
ZAR 10,773 ZAR
View
A
Retailer 7
-
£513 GBP
View
A
Retailer 8
-
£672 GBP
A$1,387 AUD
View
A
Retailer 9
-
£797 GBP
$1,069 USD
View
A
Retailer 10
-
£961 GBP
$1,289 USD
View
B+
Retailer 11
-
£1,107 GBP
$1,486 USD
View
B+
Retailer 12
-
£1,124 GBP
View
Retailer 13
-
£1,135 GBP
A$2,343 AUD
View
Price last confirmed 28 days ago
B+
Retailer 14
-
£1,155 GBP
View
B+
Retailer 15
-
£1,209 GBP
$1,622 USD
View
Most Expensive
Rare Carat
SKD-59063 · Oct 21
£1,364 GBP
$1,830 USD
View
Price last confirmed 12 days ago
15 more retailers have this diamond
Prices start from £253 GBPSave up to £955 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
1.56ct Cushion
£253 GBP