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Cushion|Lab Grown|IGI

1.43ct F SI1 Cushion Lab Grown Diamond

ID • F/SI1 • IGI LG596337026

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG596337026

Diamond specifications and retailer prices

From £140 GBP
As of November 6, 2026
Save £1,062 GBP (88%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £1,203 GBP at Do Amore Diamonds · As of November 2, 2026
View at Do Amore Diamonds

About this 1.43ct lab-grown cushion diamond

This 1.43ct lab-grown cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG596337026 or 596337026. Listed at 6 retailers as of November 2, 2026, with prices from £140 to £1,203, a £1,062 spread on the same certified stone. Do Amore Diamonds lists it at £1,203. 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

1.43
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle34.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG596337026
Dimensions8.31 × 5.68 × 3.79 mm
L/W Ratio1.46
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
8.31 mm5.68 mm1.43 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG596337026
Side View
Table 63.0%Crown 34.1°Girdle: STK-THKPavilion 34.9°Culet: NoneDepth 66.7%

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: Nov 6
Current: £1,203 GBP|Low: £140 GBP|High: £1,278 GBP|Avg: £619 GBP|-5.8%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 5, 2026
Retailer 5£140 GBP
Retailer 3£273 GBP
Retailer 2£554 GBP
Retailer 6£657 GBP
Retailer 4£803 GBP
Do Amore Diamonds£1,203 GBP

15 data points across 6 retailers

6 retailers£140 GBP to £1,203 GBP

A
Cheapest Retailer
-
£140 GBP
Final sale: no returns
B+
Retailer 2
-
£273 GBP
View
B+
Retailer 3
-
£554 GBP
View
B
Retailer 4
-
£657 GBP
View
B
Retailer 5
-
£803 GBP
View
Most Expensive
B
Do Amore Diamonds
27-CC45238AD · Nov 2
£1,203 GBP
$1,610 USD
View
5 more retailers have this diamond
Prices start from £140 GBPSave up to £1,062 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
1.43ct Cushion
£140 GBP