Marquise|Lab Grown|IGI

0.51ct D FL Marquise Lab Grown Diamond

EX • D/FL • IGI LG831629028

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG831629028

Diamond specifications and retailer prices

From $303 USD
As of November 4, 2026
Save $1,259 USD (81%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $1,562 USD at Riddles Jewelry · As of November 4, 2026
View at Riddles Jewelry

About this 0.51ct lab-grown marquise diamond

This 0.51ct lab-grown marquise sits in the half to three-quarter carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG831629028 or 831629028. Listed at 21 retailers as of November 4, 2026, with prices from $303 to $1,562, a $1,259 spread on the same certified stone. Riddles Jewelry lists it at $1,562. 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
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG831629028
Dimensions8.39 × 4.15 × 2.56 mm
L/W Ratio2.02
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.39 mm4.15 mm0.51 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG831629028
Side View
Table 58.0%Crown 34°Girdle: MED-STKPavilion 40.2°Culet: NoneDepth 61.7%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 4
Current: $1,501 USD|Low: $291 USD|High: $1,522 USD|Avg: $744 USD|-1.3%
Retailer 1
Retailer 2
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Retailer 5
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Retailer 8
Retailer 9
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Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
November 5, 2026
Retailer 14$303 USD
Retailer 2$351 USD
Retailer 5$372 USD
Retailer 3$376 USD
Retailer 15$376 USD
Retailer 4$542 USD
Retailer 11$586 USD
Retailer 13$598 USD
Retailer 12$633 USD
Retailer 9$660 USD
Retailer 10$681 USD
Retailer 6$801 USD
Retailer 16$1,207 USD
Retailer 8$1,317 USD
Retailer 1$1,501 USD
Retailer 7$1,521 USD

45 data points across 16 retailers

21 retailers$303 USD to $1,562 USD

A
Cheapest Retailer
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$303 USD
A
Retailer 2
-
$351 USD
View
Retailer 3
-
$371 USD
View
Price last confirmed 41 days ago
A
Retailer 4
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$372 USD
View
Final sale: no returns
Retailer 5
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$376 USD
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Price last confirmed 11 days ago
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Retailer 6
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$376 USD
View
A
Retailer 7
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$396 USD
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B+
Retailer 8
-
$542 USD
View
Retailer 9
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$586 USD
View
Price last confirmed 9 days ago
B+
Retailer 10
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$598 USD
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B+
Retailer 11
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$633 USD
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B+
Retailer 12
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$660 USD
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B+
Retailer 13
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$681 USD
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B
Retailer 14
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$801 USD
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B
Retailer 15
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$1,207 USD
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B
Retailer 16
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$1,254 USD
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B
Retailer 17
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$1,323 USD
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B
Retailer 18
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$1,344 USD
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B
Retailer 19
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$1,501 USD
View
B
Retailer 20
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$1,521 USD
View
Most Expensive
B
Riddles Jewelry
1978578181 · Nov 4
$1,562 USD
View
20 more retailers have this diamond
Prices start from $303 USDSave up to $1,259 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 Marquise
$303 USD