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Cushion|Lab Grown|IGI

1.73ct E IF Cushion Lab Grown Diamond

ID • E/IF • IGI LG598342461

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG598342461

Diamond specifications and retailer prices

From £415 GBP
$552 USD
As of October 28, 2026
Save £2,379 GBP (85%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £2,793 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

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 E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG598342461 or 598342461. Listed at 15 retailers as of October 28, 2026, with prices from £415 to £2,793, a £2,379 spread on the same certified stone. Brilliant Earth lists it at £2,793. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.73
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.4°
Pavilion angle39.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG598342461
Dimensions7.87 × 6.45 × 4.49 mm
L/W Ratio1.22
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
7.87 mm6.45 mm1.73 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG598342461
Side View
Table 61.0%Crown 33.4°Girdle: MED-STKPavilion 39.1°Culet: NoneDepth 69.6%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 28
Current: £2,793 GBP|Low: £415 GBP|High: £2,876 GBP|Avg: £1,037 GBP|-2.9%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 29, 2026
Retailer 3£415 GBP
Retailer 12£460 GBP
Retailer 8£492 GBP
Retailer 11£616 GBP
Retailer 2£762 GBP
Retailer 5£774 GBP
Retailer 6£790 GBP
Retailer 4£1,024 GBP
Retailer 10£1,039 GBP
Retailer 9£1,078 GBP
Retailer 7£1,921 GBP
Brilliant Earth£2,793 GBP

42 data points across 12 retailers

15 retailers£415 GBP to £2,793 GBP

A
Cheapest Retailer
-
£415 GBP
$552 USD
Final sale: no returns
A
Retailer 2
-
£460 GBP
$612 USD
View
Price last confirmed 13 days ago
A
Retailer 3
-
£492 GBP
$655 USD
View
A
Retailer 4
-
£616 GBP
$820 USD
View
A
Retailer 5
-
£762 GBP
View
A
Retailer 6
-
£774 GBP
€982 EUR
View
A
Retailer 7
-
£790 GBP
ZAR 16,985 ZAR
View
A
Retailer 8
-
£1,024 GBP
$1,363 USD
View
A
Retailer 9
-
£1,039 GBP
$1,384 USD
View
A
Retailer 10
-
£1,078 GBP
A$2,208 AUD
View
Price last confirmed 9 days ago
B+
Retailer 11
-
£1,497 GBP
$1,994 USD
View
B+
Retailer 12
-
£1,599 GBP
$2,130 USD
View
B+
Retailer 13
-
£1,921 GBP
View
B
Retailer 14
-
£2,493 GBP
$3,320 USD
View
Price last confirmed 21 days ago
Most Expensive
B
Brilliant Earth
21311625A · Oct 29
£2,793 GBP
$3,720 USD
View
14 more retailers have this diamond
Prices start from £415 GBPSave up to £2,379 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
1.73ct Cushion
£415 GBP