CaratHunter
Plans
Round|Lab Grown|IGI

0.51ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG781612518

Shape and cutting style on the report: Round brilliant

Certificate IGI LG781612518

Diamond specifications and retailer prices

From HK$1,177 HKD
As of November 4, 2026
Save HK$5,479 HKD (82%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: HK$6,656 HKD at MOH London · As of November 4, 2026
View at MOH London

About this 0.51ct lab-grown round diamond

This 0.51ct lab-grown round sits in the half to three-quarter carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG781612518 or 781612518. Listed at 8 retailers as of November 4, 2026, with prices from HK$1,177 to HK$6,656, a HK$5,479 spread on the same certified stone. MOH London lists it at HK$6,656. 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
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.1°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG781612518
Dimensions5.11 × 5.07 × 3.15 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
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
5.11 mm5.07 mm0.51 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG781612518
Side View
Table 60.0%Crown 36.1°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 61.9%

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 4
Current: HK$6,656 HKD|Low: HK$1,177 HKD|High: HK$6,705 HKD|Avg: HK$2,678 HKD|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 3HK$1,177 HKD
Retailer 2HK$1,687 HKD
Retailer 4HK$1,891 HKD
Retailer 6HK$1,899 HKD
Retailer 8HK$2,040 HKD
Retailer 5HK$2,730 HKD
Retailer 7HK$3,381 HKD
MOH LondonHK$6,656 HKD

42 data points across 8 retailers

8 retailersHK$1,177 HKD to HK$6,656 HKD

A
Cheapest Retailer
-
HK$1,177 HKD
A
Retailer 2
-
HK$1,687 HKD
View
B+
Retailer 3
-
HK$1,891 HKD
View
B+
Retailer 4
-
HK$1,899 HKD
View
B+
Retailer 5
-
HK$2,040 HKD
View
B
Retailer 6
-
HK$2,730 HKD
View
B
Retailer 7
-
HK$3,381 HKD
View
Most Expensive
B
MOH London
LG781612518 · Nov 4
HK$6,656 HKD
£668 GBP
View
7 more retailers have this diamond
Prices start from HK$1,177 HKDSave up to HK$5,479 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 Round
HK$1,177 HKD