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Cushion|Lab Grown|IGI

1.43ct D SI1 Cushion Lab Grown Diamond

ID • D/SI1 • IGI LG462166997

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG462166997

Diamond specifications and retailer prices

From £290 GBP
$388 USD
As of October 25, 2026
Save £972 GBP (77%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £1,261 GBP at Do Amore Diamonds · As of October 27, 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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG462166997 or 462166997. Listed at 4 retailers as of October 25, 2026, with prices from £290 to £1,261, a £972 spread on the same certified stone. Do Amore Diamonds lists it at £1,261. 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
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle34.7°
Pavilion angle39.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG462166997
Dimensions6.34 × 6.26 × 4.44 mm
L/W Ratio1.01
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
6.34 mm6.26 mm1.43 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG462166997
Side View
Table 59.5%Crown 34.7°Girdle: STK-VTKPavilion 39.2°Culet: NoneDepth 70.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 25
Current: £1,261 GBP|Low: £111 GBP|High: £1,261 GBP|Avg: £546 GBP
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 25, 2026
Retailer 5£147 GBP
Retailer 4£290 GBP
Retailer 8£338 GBP
Retailer 9£406 GBP
Retailer 6£446 GBP
Retailer 7£594 GBP
Retailer 3£649 GBP
Retailer 2£842 GBP
Do Amore Diamonds£1,261 GBP

10 data points across 9 retailers

4 retailers£290 GBP to £1,261 GBP

B+
Cheapest Retailer
-
£290 GBP
$388 USD
Retailer 2
-
£649 GBP
$870 USD
View
Price last confirmed 10 days ago
B
Retailer 3
-
£842 GBP
View
Most Expensive
B
Do Amore Diamonds
27-CED8CC6D9 · Oct 27
£1,261 GBP
$1,690 USD
View
3 more retailers have this diamond
Prices start from £290 GBPSave up to £972 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+
1.43ct Cushion
£290 GBP