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Cushion|Lab Grown|IGI

1.73ct H SI1 Cushion Lab Grown Diamond

VG • H/SI1 • IGI LG414069541

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG414069541

Diamond specifications and retailer prices

From £297 GBP
$398 USD
As of November 1, 2026
Save £1,350 GBP (82%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £1,648 GBP at Diamond Exchange Canada · As of October 30, 2026
View at Diamond Exchange Canada

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 very-good cut grade and certified by IGI LG414069541 or 414069541. Listed at 11 retailers as of October 30, 2026, with prices from £297 to £1,648, a £1,350 spread on the same certified stone. Diamond Exchange Canada lists it at £1,648. 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
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryGood
FluorescenceNone
Crown angle36.2°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG414069541
Dimensions6.92 × 6.76 × 4.68 mm
L/W Ratio1.02
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory grown diamond was created by chemical vapor deposition process (CVD) Type IIa
Top View
6.92 mm6.76 mm1.73 ctH / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryGood
FluorescenceNone
CertificateIGI LG414069541
Side View
Table 64.0%Crown 36.2°GirdlePavilion 40.1°Culet: NoneDepth 69.2%

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: Nov 1
Current: £1,648 GBP|Low: £212 GBP|High: £1,648 GBP|Avg: £778 GBP
Diamond Exchange Canada
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 1, 2026
Retailer 11£297 GBP
Retailer 9£329 GBP
Retailer 3£360 GBP
Retailer 8£440 GBP
Retailer 5£479 GBP
Retailer 12£525 GBP
Retailer 10£527 GBP
Retailer 7£713 GBP
Retailer 6£791 GBP
Retailer 4£972 GBP
Retailer 2£1,419 GBP
Diamond Exchange Canada£1,648 GBP

35 data points across 12 retailers

11 retailers£297 GBP to £1,648 GBP

B+
Cheapest Retailer
-
£297 GBP
$398 USD
Final sale: no returns
Retailer 2
-
£329 GBP
$441 USD
View
Price last confirmed 7 days ago
B+
Retailer 3
-
£360 GBP
$483 USD
View
B+
Retailer 4
-
£440 GBP
$590 USD
View
B+
Retailer 5
-
£479 GBP
View
B+
Retailer 6
-
£525 GBP
$704 USD
View
B+
Retailer 7
-
£527 GBP
$706 USD
View
B+
Retailer 8
-
£713 GBP
$955 USD
View
B+
Retailer 9
-
£791 GBP
$1,060 USD
View
B
Retailer 10
-
£1,419 GBP
View
Most Expensive
B
Diamond Exchange Canada
1995963723 · Oct 30
£1,648 GBP
CA$3,066 CAD
View
10 more retailers have this diamond
Prices start from £297 GBPSave up to £1,350 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
£297 GBP