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Cushion|Lab Grown|IGI

1.51ct F SI1 Cushion Lab Grown Diamond

ID • F/SI1 • IGI LG581338943

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG581338943

Diamond specifications and retailer prices

From £891 GBP
As of October 26, 2026
Save £443 GBP (33%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £1,334 GBP at Do Amore Diamonds · As of October 28, 2026
View at Do Amore Diamonds

About this 1.51ct lab-grown cushion diamond

This 1.51ct lab-grown cushion sits in the one-and-a-half to two carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG581338943 or 581338943. Listed at 4 retailers as of October 26, 2026, with prices from £891 to £1,334, a £443 spread on the same certified stone. Do Amore Diamonds lists it at £1,334. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.51
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.3°
Pavilion angle39.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG581338943
Dimensions7.98 × 6.04 × 4.08 mm
L/W Ratio1.32
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
7.98 mm6.04 mm1.51 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG581338943
Side View
Table 60.0%Crown 34.3°Girdle: MED-THKPavilion 39.5°Culet: NoneDepth 67.5%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Oct 26
Current: £1,334 GBP|Low: £296 GBP|High: £1,394 GBP|Avg: £635 GBP|-4.3%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 25, 2026
Retailer 4£303 GBP
Retailer 8£333 GBP
Retailer 7£406 GBP
Retailer 5£462 GBP
Retailer 6£575 GBP
Retailer 3£615 GBP
Retailer 9£842 GBP
Retailer 2£891 GBP
Do Amore Diamonds£1,334 GBP

11 data points across 9 retailers

4 retailers£891 GBP to £1,334 GBP

Retailer 1
-
£303 GBP
$406 USD
Price last confirmed 8 days ago
Retailer 2
-
£615 GBP
$825 USD
View
Price last confirmed 12 days ago
B
Retailer 3
-
£891 GBP
View
Most Expensive
B
Do Amore Diamonds
27-8E5D63679 · Oct 28
£1,334 GBP
$1,790 USD
View
3 more retailers have this diamond
Prices start from £891 GBPSave up to £443 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.

B
1.51ct Cushion
£891 GBP