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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 HK$1,240 HKD
$158 USD
As of November 1, 2026
Save HK$5,526 HKD (82%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: HK$6,766 HKD 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 HK$1,240 to HK$6,766, a HK$5,526 spread on the same certified stone. MOH London lists it at HK$6,766. 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

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: HK$6,766 HKD|Low: HK$973 HKD|High: HK$6,815 HKD|Avg: HK$2,587 HKD|+0.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 2, 2026
Retailer 5HK$973 HKD
Retailer 8HK$1,240 HKD
Retailer 6HK$1,451 HKD
Retailer 3HK$1,697 HKD
Retailer 2HK$1,733 HKD
Retailer 4HK$2,211 HKD
Retailer 7HK$2,981 HKD
MOH LondonHK$6,766 HKD

44 data points across 8 retailers

8 retailersHK$1,240 HKD to HK$6,766 HKD

Retailer 1
-
HK$973 HKD
$124 USD
Price last confirmed 7 days ago
A
Retailer 2
-
HK$1,240 HKD
$158 USD
View
A
Retailer 3
-
HK$1,451 HKD
$185 USD
View
A
Retailer 4
-
HK$1,697 HKD
€206 EUR
View
B+
Retailer 5
-
HK$1,733 HKD
£174 GBP
View
B+
Retailer 6
-
HK$2,211 HKD
£222 GBP
View
B
Retailer 7
-
HK$2,981 HKD
$380 USD
View
Most Expensive
B
MOH London
LG817665899 · Oct 29
HK$6,766 HKD
£679 GBP
View
7 more retailers have this diamond
Prices start from HK$1,240 HKDSave up to HK$5,526 HKD

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
HK$1,240 HKD