Marquise|Lab Grown|IGI

0.51ct D IF Marquise Lab Grown Diamond

ID • D/IF • IGI LG818657644

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG818657644

Diamond specifications and retailer prices

From $540 USD
As of November 4, 2026
11 retailers carry this diamond
Most expensive: $867 USD at MOH London · As of October 4, 2026
View at MOH London

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 LG818657644 or 818657644. Listed at 11 retailers as of November 4, 2026. 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 angle34.7°
Pavilion angle40°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818657644
Dimensions8.17 × 4.22 × 2.60 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
8.17 mm4.22 mm0.51 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818657644
Side View
Table 58.0%Crown 34.7°Girdle: MED-STKPavilion 40°Culet: NoneDepth 61.6%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 4
Current: $867 USD|Low: $165 USD|High: $1,027 USD|Avg: $444 USD|+1.0%
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
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Retailer 17
October 7, 2026
Retailer 5$165 USD
Retailer 17$181 USD
Retailer 14$183 USD
Retailer 6$260 USD
Retailer 10$311 USD
Retailer 2$323 USD
Retailer 11$331 USD
Retailer 8$341 USD
Retailer 4$367 USD
Retailer 13$455 USD
Retailer 16$467 USD
Retailer 3$483 USD
Retailer 12$540 USD
Retailer 15$563 USD
Retailer 9$645 USD
MOH London$867 USD
Retailer 7$1,027 USD

14 data points across 17 retailers

11 retailers

Retailer 1
-
$142 USD
Price last confirmed 34 days ago
Retailer 2
-
$172 USD
View
Price last confirmed 37 days ago
Retailer 3
-
$181 USD
View
Price last confirmed 41 days ago
Retailer 4
-
$183 USD
View
Price last confirmed 33 days ago
Retailer 5
-
$260 USD
View
Price last confirmed 20 days ago
Retailer 6
-
$331 USD
View
Price last confirmed 31 days ago
Retailer 7
-
$367 USD
View
Price last confirmed 21 days ago
Retailer 8
-
$455 USD
View
Price last confirmed 32 days ago
B+
Retailer 9
-
$540 USD
View
Retailer 10
-
$590 USD
View
Price last confirmed 36 days ago
Most Expensive
MOH London
LG818657644 · Oct 4
$867 USD
£683 GBP
View
Price last confirmed 31 days ago
10 more retailers have this diamond
Prices start from $540 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.

B+
0.51ct Marquise
$540 USD