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Oval|Lab Grown|IGI

0.51ct D SI1 Oval Lab Grown Diamond

ID • D/SI1 • IGI LG735508929

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG735508929

Diamond specifications and retailer prices

From $83 USD
As of October 29, 2026
Save $674 USD (89%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $757 USD at MOH London · As of October 29, 2026
View at MOH London

About this 0.51ct lab-grown oval diamond

This 0.51ct lab-grown oval sits in the half to three-quarter carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG735508929 or 735508929. Listed at 14 retailers as of October 29, 2026, with prices from $83 to $757, a $674 spread on the same certified stone. MOH London lists it at $757. 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

0.51
Carat
D
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle31.3°
Pavilion angle41.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG735508929
Dimensions6.50 × 4.42 × 2.79 mm
L/W Ratio1.47
Girdle conditionFaceted
Culet sizePointed
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
6.50 mm4.42 mm0.51 ctD / SI1
OriginLab Grown
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG735508929
Side View
Table 59.0%Crown 31.3°Girdle: MED-STKPavilion 41.6°Culet: NoneDepth 63.1%

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 29
Current: $757 USD|Low: $68 USD|High: $794 USD|Avg: $228 USD|-4.6%
MOH London
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
October 30, 2026
Retailer 10$83 USD
Retailer 2$92 USD
Retailer 3$96 USD
Retailer 11$109 USD
Retailer 6$112 USD
Retailer 13$170 USD
Retailer 8$183 USD
Retailer 4$206 USD
Retailer 15$222 USD
Retailer 5$229 USD
Retailer 9$247 USD
Retailer 7$280 USD
Retailer 14$329 USD
Retailer 12$336 USD
MOH London$757 USD

36 data points across 15 retailers

14 retailers$83 USD to $757 USD

A
Cheapest Retailer
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$83 USD
A
Retailer 2
-
$92 USD
View
Final sale: no returns
A
Retailer 3
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$96 USD
View
A
Retailer 4
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$109 USD
View
A
Retailer 5
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$112 USD
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A
Retailer 6
-
$170 USD
View
A
Retailer 7
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$183 USD
£144 GBP
View
A
Retailer 8
-
$222 USD
View
B+
Retailer 9
-
$229 USD
View
A
Retailer 10
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$247 USD
£195 GBP
View
B+
Retailer 11
-
$280 USD
View
B+
Retailer 12
-
$329 USD
View
B+
Retailer 13
-
$336 USD
View
Most Expensive
B
MOH London
LG735508929 · Oct 29
$757 USD
£596 GBP
View
13 more retailers have this diamond
Prices start from $83 USDSave up to $674 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 Oval
$83 USD