Marquise|Lab Grown|IGI

0.51ct D IF Marquise Lab Grown Diamond

ID • D/IF • IGI LG815611661

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG815611661

Diamond specifications and retailer prices

From $155 USD
As of November 4, 2026
Save $742 USD (83%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $897 USD at MOH London · As of November 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 LG815611661 or 815611661. Listed at 18 retailers as of November 4, 2026, with prices from $155 to $897, a $742 spread on the same certified stone. MOH London lists it at $897. 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 angle35.1°
Pavilion angle39.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG815611661
Dimensions8.19 × 4.20 × 2.50 mm
L/W Ratio1.95
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
8.19 mm4.20 mm0.51 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG815611661
Side View
Table 63.0%Crown 35.1°Girdle: STK-THKPavilion 39.3°Culet: NoneDepth 59.5%

Caratlytics Score

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A+
Exceptional
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: $897 USD|Low: $155 USD|High: $1,030 USD|Avg: $414 USD|-12.9%
MOH London
Retailer 2
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Retailer 11
Retailer 12
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Retailer 18
November 4, 2026
Retailer 7$155 USD
Retailer 4$174 USD
Retailer 12$180 USD
Retailer 16$192 USD
Retailer 9$210 USD
Retailer 3$217 USD
Retailer 11$333 USD
Retailer 15$349 USD
Retailer 2$351 USD
Retailer 8$359 USD
Retailer 17$415 USD
Retailer 14$450 USD
Retailer 13$490 USD
Retailer 5$527 USD
Retailer 10$540 USD
Retailer 18$618 USD
Retailer 6$653 USD
MOH London$897 USD

22 data points across 18 retailers

18 retailers$155 USD to $897 USD

A+
Cheapest Retailer
-
$155 USD
A
Retailer 2
-
$174 USD
View
Final sale: no returns
A
Retailer 3
-
$180 USD
View
A
Retailer 4
-
$192 USD
View
Retailer 5
-
$210 USD
View
Price last confirmed 11 days ago
A
Retailer 6
-
$217 USD
View
A
Retailer 7
-
$333 USD
View
A
Retailer 8
-
$349 USD
View
A
Retailer 9
-
$351 USD
View
A
Retailer 10
-
$359 USD
View
A
Retailer 11
-
$415 USD
View
A
Retailer 12
-
$450 USD
View
B+
Retailer 13
-
$490 USD
View
B+
Retailer 14
-
$527 USD
View
Retailer 15
-
$540 USD
View
Price last confirmed 15 days ago
B+
Retailer 16
-
$618 USD
View
B+
Retailer 17
-
$653 USD
View
Most Expensive
B
MOH London
LG815611661 · Nov 4
$897 USD
£706 GBP
View
17 more retailers have this diamond
Prices start from $155 USDSave up to $742 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
$155 USD