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Marquise|Lab Grown|IGI

0.51ct D SI1 Marquise Lab Grown Diamond

EX • D/SI1 • IGI LG817665899

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG817665899

Diamond specifications and retailer prices

From $202 SGD
$158 USD
As of November 1, 2026
Save $900 SGD (82%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $1,102 SGD at MOH London · As of October 29, 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG817665899 or 817665899. Listed at 8 retailers as of October 29, 2026, with prices from $202 to $1,102, a $900 spread on the same certified stone. MOH London lists it at $1,102. 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
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle37.5°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG817665899
Dimensions8.18 × 4.05 × 2.65 mm
L/W Ratio2.02
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
8.18 mm4.05 mm0.51 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG817665899
Side View
Table 63.0%Crown 37.5°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 65.4%

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: Nov 1
Current: $1,102 SGD|Low: $159 SGD|High: $1,111 SGD|Avg: $422 SGD|+0.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 1, 2026
Retailer 5$159 SGD
Retailer 8$202 SGD
Retailer 6$237 SGD
Retailer 3$277 SGD
Retailer 2$282 SGD
Retailer 4$360 SGD
Retailer 7$486 SGD
MOH London$1,102 SGD

43 data points across 8 retailers

8 retailers$202 SGD to $1,102 SGD

Retailer 1
-
$159 SGD
$124 USD
Price last confirmed 7 days ago
A
Retailer 2
-
$202 SGD
$158 USD
View
A
Retailer 3
-
$237 SGD
$185 USD
View
A
Retailer 4
-
$277 SGD
€206 EUR
View
B+
Retailer 5
-
$282 SGD
£174 GBP
View
B+
Retailer 6
-
$360 SGD
£222 GBP
View
B
Retailer 7
-
$486 SGD
$380 USD
View
Most Expensive
B
MOH London
LG817665899 · Oct 29
$1,102 SGD
£679 GBP
View
7 more retailers have this diamond
Prices start from $202 SGDSave up to $900 SGD

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
$202 SGD