Radiant|Lab Grown|IGI

0.51ct E IF Radiant Lab Grown Diamond

EX • E/IF • IGI LG786676873

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

Certificate IGI LG786676873

Diamond specifications and retailer prices

From $147 USD
As of October 27, 2026
Save $708 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 LG786676873 or 786676873. Listed at 20 retailers as of October 27, 2026, with a 481% 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37°
Pavilion angle36.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG786676873
Dimensions5.81 × 3.97 × 2.65 mm
L/W Ratio1.46
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
5.81 mm3.97 mm0.51 ctE / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG786676873
Side View
Table 67.0%Crown 37°Girdle: MED-STKPavilion 36.7°Culet: NoneDepth 66.8%

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 27
Current: $855 USD|Low: $147 USD|High: $897 USD|Avg: $414 USD|-4.7%
Retailer 1
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
Retailer 15
Retailer 16
Retailer 17
Retailer 18
October 29, 2026
Retailer 14$147 USD
Retailer 15$164 USD
Retailer 4$184 USD
Retailer 6$184 USD
Retailer 11$248 USD
Retailer 18$316 USD
Retailer 13$330 USD
Retailer 7$334 USD
Retailer 9$355 USD
Retailer 2$450 USD
Retailer 3$467 USD
Retailer 8$483 USD
Retailer 17$504 USD
Retailer 12$583 USD
Retailer 5$591 USD
Retailer 10$624 USD
Retailer 16$643 USD
Retailer 1$855 USD

20 data points across 18 retailers

20 retailers$147 USD to $855 USD

A
Cheapest Retailer
-
$147 USD
A
Retailer 2
-
$164 USD
View
Final sale: no returns
A
Retailer 3
-
$184 USD
View
A
Retailer 4
-
$184 USD
View
A
Retailer 5
-
$248 USD
View
A
Retailer 6
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$316 USD
£249 GBP
View
A
Retailer 7
-
$330 USD
ZAR 5,335 ZAR
View
A
Retailer 8
-
$334 USD
View
B+
Retailer 9
-
$355 USD
€338 EUR
View
B+
Retailer 10
-
$450 USD
A$693 AUD
View
B+
Retailer 11
-
$467 USD
A$719 AUD
View
B+
Retailer 12
-
$483 USD
View
B+
Retailer 13
-
$500 USD
View
Price last confirmed 10 days ago
B+
Retailer 14
-
$504 USD
SGD 681 SGD
View
B
Retailer 15
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$583 USD
View
B+
Retailer 16
-
$591 USD
View
B
Retailer 17
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$624 USD
View
B
Retailer 18
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$643 USD
View
B
Retailer 19
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$855 USD
£673 GBP
View
Most Expensive
B
Flawless Fine Jewelry
5DE29BA64 · 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 $708 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