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0.51ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG840619657

Shape and cutting style on the report: Round brilliant

Certificate IGI LG840619657

Diamond specifications and retailer prices

From $285 CAD
£161 GBP
As of November 1, 2026
Save $850 CAD (75%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $1,135 CAD at MOH London · As of November 1, 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 F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG840619657 or 840619657. Listed at 7 retailers as of November 1, 2026, with prices from $285 to $1,135, a $850 spread on the same certified stone. MOH London lists it at $1,135. 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
F
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.4°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840619657
Dimensions5.14 × 5.15 × 3.13 mm
L/W Ratio1.00
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
5.14 mm5.15 mm0.51 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG840619657
Side View
Table 58.0%Crown 33.4°Girdle: MediumPavilion 40.9°Culet: NoneDepth 60.8%

Caratlytics Score

How it works →
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: $1,135 CAD|Low: $265 CAD|High: $1,148 CAD|Avg: $497 CAD|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 1, 2026
Retailer 2$285 CAD
Retailer 4$286 CAD
Retailer 3$296 CAD
Retailer 6$325 CAD
Retailer 7$580 CAD
Retailer 5$584 CAD
MOH London$1,135 CAD

19 data points across 7 retailers

7 retailers$285 CAD to $1,135 CAD

A
Cheapest Retailer
-
$285 CAD
£161 GBP
A
Retailer 2
-
$286 CAD
$205 USD
View
A
Retailer 3
-
$296 CAD
€202 EUR
View
A
Retailer 4
-
$325 CAD
$233 USD
View
B+
Retailer 5
-
$580 CAD
$415 USD
View
B+
Retailer 6
-
$584 CAD
$418 USD
View
Most Expensive
B
MOH London
LG840619657 · Nov 1
$1,135 CAD
£640 GBP
View
6 more retailers have this diamond
Prices start from $285 CADSave up to $850 CAD

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
$285 CAD