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Cushion|Lab Grown|IGI

1.73ct H SI1 Cushion Lab Grown Diamond

GD • H/SI1 • IGI LG538290301

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG538290301

Diamond specifications and retailer prices

From £259 GBP
$347 USD
As of November 1, 2026
Save £888 GBP (77%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £1,147 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 1.73ct lab-grown cushion diamond

This 1.73ct lab-grown cushion sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI LG538290301 or 538290301. Listed at 9 retailers as of November 1, 2026, with prices from £259 to £1,147, a £888 spread on the same certified stone. MOH London lists it at £1,147. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.73
Carat
H
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.4°
Pavilion angle42°
OriginLab Grown
Grading LabIGI
CertificateIGI LG538290301
Dimensions7.41 × 7.34 × 4.64 mm
L/W Ratio1.01
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
7.41 mm7.34 mm1.73 ctH / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG538290301
Side View
Table 61.5%Crown 34.4°Girdle: MED-STKPavilion 42°Culet: NoneDepth 63.2%

Caratlytics Score

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

Price History

Last verified: Nov 1
Current: £1,147 GBP|Low: £185 GBP|High: £1,161 GBP|Avg: £590 GBP|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 7£259 GBP
Retailer 5£286 GBP
Retailer 4£432 GBP
Retailer 9£458 GBP
Retailer 6£466 GBP
Retailer 8£541 GBP
Retailer 10£578 GBP
Retailer 3£704 GBP
Retailer 2£782 GBP
MOH London£1,147 GBP

12 data points across 10 retailers

9 retailers£259 GBP to £1,147 GBP

B+
Cheapest Retailer
-
£259 GBP
$347 USD
Final sale: no returns
Retailer 2
-
£286 GBP
$384 USD
View
Price last confirmed 23 days ago
B+
Retailer 3
-
£432 GBP
$580 USD
View
B+
Retailer 4
-
£458 GBP
$614 USD
View
B+
Retailer 5
-
£466 GBP
$626 USD
View
B+
Retailer 6
-
£541 GBP
$726 USD
View
B+
Retailer 7
-
£704 GBP
$945 USD
View
B+
Retailer 8
-
£782 GBP
$1,050 USD
View
Most Expensive
B
MOH London
LG538290301 · Nov 1
£1,147 GBP
View
8 more retailers have this diamond
Prices start from £259 GBPSave up to £888 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+
1.73ct Cushion
£259 GBP