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Cushion|Lab Grown|IGI

1.73ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG818683412

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG818683412

Diamond specifications and retailer prices

From £625 GBP
$838 USD
As of October 30, 2026
Save £3,144 GBP (83%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £3,769 GBP at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

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 LG818683412 or 818683412. Listed at 12 retailers as of October 30, 2026, with prices from £625 to £3,769, a £3,144 spread on the same certified stone. Do Amore Diamonds lists it at £3,769. 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 angle31.5°
Pavilion angle35.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818683412
Dimensions8.34 × 6.48 × 4.17 mm
L/W Ratio1.29
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
8.34 mm6.48 mm1.73 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818683412
Side View
Table 58.0%Crown 31.5°Girdle: STK-THKPavilion 35.7°Culet: NoneDepth 64.4%

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 30
Current: £3,769 GBP|Low: £625 GBP|High: £4,985 GBP|Avg: £1,902 GBP|-24.4%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
October 31, 2026
Retailer 10£625 GBP
Retailer 14£631 GBP
Retailer 9£811 GBP
Retailer 3£819 GBP
Retailer 2£932 GBP
Retailer 4£962 GBP
Retailer 11£1,480 GBP
Retailer 13£2,172 GBP
Retailer 8£2,303 GBP
Retailer 12£2,485 GBP
Retailer 5£2,541 GBP
Retailer 6£2,541 GBP
Retailer 7£2,672 GBP
Do Amore Diamonds£3,769 GBP

28 data points across 14 retailers

12 retailers£625 GBP to £3,769 GBP

A
Cheapest Retailer
-
£625 GBP
$838 USD
A
Retailer 2
-
£631 GBP
$845 USD
View
A
Retailer 3
-
£811 GBP
$1,086 USD
View
A
Retailer 4
-
£819 GBP
$1,097 USD
View
A
Retailer 5
-
£932 GBP
€1,189 EUR
View
Retailer 6
-
£962 GBP
$1,289 USD
View
Price last confirmed 9 days ago
B+
Retailer 7
-
£1,480 GBP
$1,983 USD
View
Retailer 8
-
£2,172 GBP
$2,910 USD
View
Price last confirmed 11 days ago
B+
Retailer 9
-
£2,303 GBP
View
B+
Retailer 10
-
£2,485 GBP
$3,329 USD
View
B+
Retailer 11
-
£2,672 GBP
$3,580 USD
View
Most Expensive
B
Do Amore Diamonds
27-C45B33898 · Oct 31
£3,769 GBP
$5,050 USD
View
11 more retailers have this diamond
Prices start from £625 GBPSave up to £3,144 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
£625 GBP