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Cushion|Lab Grown|IGI

1.73ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG846662374

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG846662374

Diamond specifications and retailer prices

From £490 GBP
As of October 30, 2026
Save £2,197 GBP (82%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £2,687 GBP at Brilliant Earth · As of October 30, 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 D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG846662374 or 846662374. Listed at 10 retailers as of October 30, 2026, with prices from £490 to £2,687, a £2,197 spread on the same certified stone. Brilliant Earth lists it at £2,687. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.73
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.7°
Pavilion angle41.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG846662374
Dimensions8.01 × 6.45 × 4.44 mm
L/W Ratio1.24
Girdle conditionFaceted
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
8.01 mm6.45 mm1.73 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG846662374
Side View
Table 61.0%Crown 35.7°Girdle: MED-THKPavilion 41.7°Culet: NoneDepth 68.8%

Caratlytics Score

How it works →
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 30
Current: £2,687 GBP|Low: £490 GBP|High: £5,567 GBP|Avg: £1,839 GBP|-23.7%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 31, 2026
Retailer 8£490 GBP
Retailer 3£567 GBP
Retailer 7£718 GBP
Retailer 5£1,041 GBP
Retailer 2£1,080 GBP
Retailer 6£1,608 GBP
Retailer 4£1,678 GBP
Retailer 10£2,194 GBP
Retailer 9£2,303 GBP
Brilliant Earth£2,687 GBP

10 data points across 10 retailers

10 retailers£490 GBP to £2,687 GBP

A
Cheapest Retailer
-
£490 GBP
A
Retailer 2
-
£567 GBP
$760 USD
View
A
Retailer 3
-
£718 GBP
$962 USD
View
A
Retailer 4
-
£1,041 GBP
$1,395 USD
View
A
Retailer 5
-
£1,080 GBP
€1,378 EUR
View
B+
Retailer 6
-
£1,608 GBP
$2,154 USD
View
B+
Retailer 7
-
£1,678 GBP
$2,248 USD
View
Retailer 8
-
£2,194 GBP
$2,940 USD
View
Price last confirmed 11 days ago
B+
Retailer 9
-
£2,303 GBP
View
Most Expensive
B
Brilliant Earth
22154764A · Oct 30
£2,687 GBP
$3,600 USD
View
9 more retailers have this diamond
Prices start from £490 GBPSave up to £2,197 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
£490 GBP