Radiant|Lab Grown|IGI

0.51ct E IF Radiant Lab Grown Diamond

ID • E/IF • IGI LG790630389

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

Certificate IGI LG790630389

Diamond specifications and retailer prices

From $147 USD
As of October 27, 2026
Save $703 USD (83%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $869 USD at Flawless Fine Jewelry · As of September 22, 2026
View at Flawless Fine Jewelry

About this 0.51ct lab-grown radiant diamond

This 0.51ct lab-grown radiant sits in the half to three-quarter carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG790630389 or 790630389. Listed at 20 retailers as of October 27, 2026, with a 478% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Flawless clarity in sub-one-carat stones is rarely visible to the naked eye over VS1, so you are paying a meaningful premium for grade rather than appearance.

The 4Cs

0.51
Carat
E
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle50.2°
Pavilion angle38.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG790630389
Dimensions5.56 × 3.91 × 2.72 mm
L/W Ratio1.42
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
5.56 mm3.91 mm0.51 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG790630389
Side View
Table 67.0%Crown 50.2°Girdle: MediumPavilion 38.4°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 27
Current: $311 USD|Low: $147 USD|High: $892 USD|Avg: $397 USD|-3.1%
Retailer 1
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Retailer 19
October 29, 2026
Retailer 2$147 USD
Retailer 13$162 USD
Retailer 8$171 USD
Retailer 12$181 USD
Retailer 7$183 USD
Retailer 6$248 USD
Retailer 1$311 USD
Retailer 19$329 USD
Retailer 11$334 USD
Retailer 9$353 USD
Retailer 10$450 USD
Retailer 4$463 USD
Retailer 3$481 USD
Retailer 14$499 USD
Retailer 16$576 USD
Retailer 17$581 USD
Retailer 5$617 USD
Retailer 18$637 USD
Retailer 15$850 USD

20 data points across 19 retailers

20 retailers$147 USD to $850 USD

A
Cheapest Retailer
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$147 USD
A
Retailer 2
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$162 USD
View
Final sale: no returns
A
Retailer 3
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$171 USD
View
A
Retailer 4
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$181 USD
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A
Retailer 5
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$183 USD
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A
Retailer 6
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$248 USD
View
A
Retailer 7
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$311 USD
£245 GBP
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A
Retailer 8
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$329 USD
ZAR 5,308 ZAR
View
A
Retailer 9
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$334 USD
View
B+
Retailer 10
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$353 USD
€336 EUR
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B+
Retailer 11
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$450 USD
A$693 AUD
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B+
Retailer 12
-
$463 USD
A$712 AUD
View
B+
Retailer 13
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$481 USD
View
B+
Retailer 14
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$499 USD
SGD 674 SGD
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B+
Retailer 15
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$576 USD
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B+
Retailer 16
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$581 USD
View
B
Retailer 17
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$617 USD
View
B
Retailer 18
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$637 USD
View
B
Retailer 19
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$850 USD
£669 GBP
View
Most Expensive
B
Flawless Fine Jewelry
F4F4689CE · Sep 22
$869 USD
£684 GBP
View
Price last confirmed 37 days ago
19 more retailers have this diamond
Prices start from $147 USDSave up to $703 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.

A
0.51ct Radiant
$147 USD