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Radiant|Lab Grown|IGI

1.73ct D IF Radiant Lab Grown Diamond

EX • D/IF • IGI LG821651606

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG821651606

Diamond specifications and retailer prices

From £315 GBP
$422 USD
As of October 30, 2026
Save £1,226 GBP (80%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £1,541 GBP at Michael Trio · As of October 31, 2026
View at Michael Trio

About this 1.73ct lab-grown radiant diamond

This 1.73ct lab-grown radiant sits in the one-and-a-half to two carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG821651606 or 821651606. Listed at 15 retailers as of October 30, 2026, with prices from £315 to £1,541, a £1,226 spread on the same certified stone. Michael Trio lists it at £1,541. 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
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42°
Pavilion angle31.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG821651606
Dimensions9.17 × 5.71 × 3.73 mm
L/W Ratio1.61
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.17 mm5.71 mm1.73 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG821651606
Side View
Table 67.0%Crown 42°Girdle: Slightly ThickPavilion 31.8°Culet: NoneDepth 65.3%

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: £1,541 GBP|Low: £315 GBP|High: £1,567 GBP|Avg: £770 GBP|-1.7%
Michael Trio
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 31, 2026
Retailer 3£315 GBP
Retailer 8£368 GBP
Retailer 11£459 GBP
Retailer 2£466 GBP
Retailer 5£540 GBP
Retailer 4£599 GBP
Retailer 9£629 GBP
Retailer 12£809 GBP
Retailer 6£975 GBP
Retailer 7£980 GBP
Retailer 10£1,146 GBP
Retailer 13£1,370 GBP
Michael Trio£1,541 GBP

20 data points across 13 retailers

15 retailers£315 GBP to £1,541 GBP

A
Cheapest Retailer
-
£315 GBP
$422 USD
Final sale: no returns
A
Retailer 2
-
£368 GBP
View
A
Retailer 3
-
£459 GBP
$615 USD
View
A
Retailer 4
-
£466 GBP
$625 USD
View
Retailer 5
-
£540 GBP
€689 EUR
View
Price last confirmed 7 days ago
A
Retailer 6
-
£599 GBP
ZAR 12,965 ZAR
View
A
Retailer 7
-
£629 GBP
View
A
Retailer 8
-
£809 GBP
A$1,667 AUD
View
B+
Retailer 9
-
£975 GBP
$1,306 USD
View
B+
Retailer 10
-
£980 GBP
$1,313 USD
View
B+
Retailer 11
-
£1,146 GBP
$1,535 USD
View
B+
Retailer 12
-
£1,346 GBP
$1,803 USD
View
B+
Retailer 13
-
£1,370 GBP
View
Retailer 14
-
£1,451 GBP
A$2,992 AUD
View
Price last confirmed 23 days ago
Most Expensive
B+
Michael Trio
2037643848 · Oct 31
£1,541 GBP
SGD 2,790 SGD
View
14 more retailers have this diamond
Prices start from £315 GBPSave up to £1,226 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 Radiant
£315 GBP