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Radiant|Lab Grown|IGI

0.73ct F SI1 Radiant Lab Grown Diamond

ID • F/SI1 • IGI LG508121562

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

Certificate IGI LG508121562

Diamond specifications and retailer prices

From $440 USD
As of October 31, 2026
Save $707 USD (62%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $1,816 USD at NZ Jewellers · As of November 1, 2026
View at NZ Jewellers

About this 0.73ct lab-grown radiant diamond

This 0.73ct lab-grown radiant sits in the half to three-quarter carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG508121562 or 508121562. Listed at 12 retailers as of October 31, 2026, with a 161% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

0.73
Carat
F
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.9°
Pavilion angle31.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG508121562
Dimensions5.91 × 4.38 × 3.08 mm
L/W Ratio1.35
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
5.91 mm4.38 mm0.73 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG508121562
Side View
Table 67.5%Crown 37.9°Girdle: STK-THKPavilion 31.5°Culet: NoneDepth 70.3%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: $1,816 USD|Low: $440 USD|High: $3,034 USD|Avg: $1,106 USD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 2, 2026
Retailer 7$440 USD
Retailer 9$557 USD
Retailer 4$623 USD
Retailer 12$624 USD
Retailer 3$691 USD
Retailer 10$691 USD
Retailer 11$1,066 USD
Retailer 2$1,077 USD
Retailer 6$1,147 USD
Retailer 8$1,782 USD
NZ Jewellers$1,816 USD
Retailer 5$2,998 USD

44 data points across 12 retailers

12 retailers$440 USD to $1,147 USD

B+
Cheapest Retailer
-
$440 USD
B
Retailer 2
-
$557 USD
View
B
Retailer 3
-
$623 USD
View
Final sale: no returns
B
Retailer 4
-
$624 USD
View
Retailer 5
-
$691 USD
View
Price last confirmed 17 days ago
B
Retailer 6
-
$691 USD
View
B
Retailer 7
-
$1,066 USD
View
B
Retailer 8
-
$1,077 USD
£848 GBP
View
B
Retailer 9
-
$1,147 USD
€1,092 EUR
View
Retailer 10
-
$1,782 USD
View
Price under review
Most Expensive
NZ Jewellers
45bb01ef-b50c-4cf6-9509-a15cf4491b3c · Nov 1
$1,816 USD
View
Price under review
10 more retailers have this diamond
Prices start from $440 USDSave up to $707 USD

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+
0.73ct Radiant
$440 USD