Radiant|Lab Grown|IGI

0.51ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG837656435

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

Certificate IGI LG837656435

Diamond specifications and retailer prices

From $136 USD
As of November 4, 2026
Save $1,242 USD (90%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $1,378 USD at MOH London · As of November 1, 2026
View at MOH London

About this 0.51ct lab-grown radiant diamond

This 0.51ct lab-grown radiant sits in the half to three-quarter carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG837656435 or 837656435. Listed at 22 retailers as of November 1, 2026, with prices from $136 to $1,378, a $1,242 spread on the same certified stone. MOH London lists it at $1,378. 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
D
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle46.9°
Pavilion angle36.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG837656435
Dimensions5.65 × 4.09 × 2.66 mm
L/W Ratio1.38
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
5.65 mm4.09 mm0.51 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG837656435
Side View
Table 66.0%Crown 46.9°Girdle: MediumPavilion 36.5°Culet: NoneDepth 65.0%

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: Nov 4
Current: $1,378 USD|Low: $128 USD|High: $1,396 USD|Avg: $421 USD|-1.3%
MOH London
Retailer 2
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Retailer 22
November 4, 2026
Retailer 13$136 USD
Retailer 17$151 USD
Retailer 22$158 USD
Retailer 14$165 USD
Retailer 4$169 USD
Retailer 20$228 USD
Retailer 21$283 USD
Retailer 8$284 USD
Retailer 7$299 USD
Retailer 11$336 USD
Retailer 10$370 USD
Retailer 15$391 USD
Retailer 6$420 USD
Retailer 9$493 USD
Retailer 12$520 USD
Retailer 3$523 USD
Retailer 16$543 USD
Retailer 18$573 USD
Retailer 5$598 USD
Retailer 2$883 USD
Retailer 19$989 USD
MOH London$1,378 USD

39 data points across 22 retailers

22 retailers$136 USD to $1,378 USD

A
Cheapest Retailer
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$136 USD
A
Retailer 2
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$151 USD
View
Final sale: no returns
A
Retailer 3
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$158 USD
View
Retailer 4
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$165 USD
View
Price last confirmed 23 days ago
A
Retailer 5
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$169 USD
View
A
Retailer 6
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$228 USD
View
A
Retailer 7
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$283 USD
View
A
Retailer 8
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$284 USD
View
A
Retailer 9
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$299 USD
View
A
Retailer 10
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$336 USD
View
Retailer 11
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$370 USD
View
Price last confirmed 14 days ago
B+
Retailer 12
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$391 USD
View
B+
Retailer 13
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$420 USD
View
Retailer 14
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$493 USD
View
Price last confirmed 7 days ago
B+
Retailer 15
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$520 USD
View
B+
Retailer 16
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$523 USD
View
B+
Retailer 17
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$543 USD
View
B
Retailer 18
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$573 USD
View
B
Retailer 19
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$598 USD
View
B
Retailer 20
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$883 USD
View
B
Retailer 21
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$989 USD
View
Most Expensive
B
MOH London
LG837656435 · Nov 1
$1,378 USD
£1,085 GBP
View
21 more retailers have this diamond
Prices start from $136 USDSave up to $1,242 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
$136 USD