Marquise|Lab Grown|IGI

0.51ct D IF Marquise Lab Grown Diamond

ID • D/IF • IGI LG818661833

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG818661833

Diamond specifications and retailer prices

From $148 USD
As of November 4, 2026
Save $879 USD (86%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $1,027 USD at Reve Diamonds · As of November 4, 2026
View at Reve Diamonds

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 IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG818661833 or 818661833. Listed at 20 retailers as of November 4, 2026, with prices from $148 to $1,027, a $879 spread on the same certified stone. Reve Diamonds lists it at $1,027. 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 angle34.4°
Pavilion angle40°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818661833
Dimensions8.26 × 4.25 × 2.56 mm
L/W Ratio1.94
Girdle conditionFaceted
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
8.26 mm4.25 mm0.51 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818661833
Side View
Table 61.0%Crown 34.4°Girdle: MED-STKPavilion 40°Culet: NoneDepth 60.2%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 4
Current: $313 USD|Low: $142 USD|High: $867 USD|Avg: $375 USD|+3.3%
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November 5, 2026
Retailer 14$148 USD
Retailer 9$165 USD
Retailer 2$172 USD
Retailer 15$183 USD
Retailer 18$183 USD
Retailer 10$260 USD
Retailer 1$313 USD
Retailer 17$323 USD
Retailer 13$333 USD
Retailer 5$341 USD
Retailer 8$367 USD
Retailer 4$445 USD
Retailer 12$467 USD
Retailer 7$483 USD
Retailer 6$540 USD
Retailer 16$590 USD
Retailer 3$623 USD
Retailer 11$853 USD

38 data points across 18 retailers

20 retailers$148 USD to $1,027 USD

A
Cheapest Retailer
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$148 USD
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Retailer 2
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$165 USD
View
Final sale: no returns
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Retailer 3
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$172 USD
View
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Retailer 4
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$183 USD
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Retailer 5
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$183 USD
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Price last confirmed 11 days ago
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Retailer 6
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$260 USD
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Retailer 7
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$313 USD
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Retailer 8
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$323 USD
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Price last confirmed 11 days ago
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Retailer 9
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$333 USD
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Retailer 10
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$341 USD
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Retailer 11
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$367 USD
View
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Retailer 12
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$445 USD
View
A
Retailer 13
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$467 USD
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B+
Retailer 14
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$483 USD
View
B+
Retailer 15
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$540 USD
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B+
Retailer 16
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$590 USD
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B+
Retailer 17
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$623 USD
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B+
Retailer 18
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$645 USD
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B+
Retailer 19
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$853 USD
View
Most Expensive
B
Reve Diamonds
AFF4121F0 · Nov 4
$1,027 USD
View
19 more retailers have this diamond
Prices start from $148 USDSave up to $879 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
$148 USD