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Round|Lab Grown|IGI

1.51ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG778688204

Shape and cutting style on the report: Round brilliant

Certificate IGI LG778688204

Diamond specifications and retailer prices

From $317 CAD
As of November 6, 2026
Save $1,052 CAD (77%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $1,669 CAD at MOH London · As of October 26, 2026
View at MOH London

About this 1.51ct lab-grown round diamond

This 1.51ct lab-grown round sits in the one-and-a-half to two carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG778688204 or 778688204. Listed at 18 retailers as of November 5, 2026, with a 332% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.51
Carat
F
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.9°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG778688204
Dimensions7.29 × 7.34 × 4.55 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.29 mm7.34 mm1.51 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG778688204
Side View
Table 58.0%Crown 35.9°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 62.2%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: $1,669 CAD|Low: $277 CAD|High: $1,788 CAD|Avg: $821 CAD|+14.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
November 6, 2026
Retailer 6$288 CAD
Retailer 14$317 CAD
Retailer 9$334 CAD
Retailer 5$392 CAD
Retailer 2$574 CAD
Retailer 15$610 CAD
Retailer 16$615 CAD
Retailer 11$635 CAD
Retailer 10$644 CAD
Retailer 8$714 CAD
Retailer 17$760 CAD
Retailer 3$1,075 CAD
Retailer 12$1,137 CAD
Retailer 4$1,144 CAD
Retailer 7$1,147 CAD
Retailer 13$1,369 CAD
MOH London$1,669 CAD

43 data points across 17 retailers

18 retailers$317 CAD to $1,369 CAD

Retailer 1
-
$288 CAD
Price last confirmed 11 days ago
A
Retailer 2
-
$317 CAD
View
Final sale: no returns
Retailer 3
-
$334 CAD
View
Price last confirmed 10 days ago
Retailer 4
-
$356 CAD
View
Price last confirmed 14 days ago
A
Retailer 5
-
$392 CAD
View
A
Retailer 6
-
$574 CAD
View
B+
Retailer 7
-
$610 CAD
View
A
Retailer 8
-
$615 CAD
View
A
Retailer 9
-
$635 CAD
View
A
Retailer 10
-
$644 CAD
View
Retailer 11
-
$714 CAD
View
Price last confirmed 11 days ago
A
Retailer 12
-
$760 CAD
View
Retailer 13
-
$1,075 CAD
View
Price last confirmed 9 days ago
B
Retailer 14
-
$1,137 CAD
View
B+
Retailer 15
-
$1,144 CAD
View
Retailer 16
-
$1,147 CAD
View
Price last confirmed 13 days ago
B
Retailer 17
-
$1,369 CAD
View
Most Expensive
MOH London
LG778688204 · Oct 26
$1,669 CAD
£941 GBP
View
Price last confirmed 10 days ago
17 more retailers have this diamond
Prices start from $317 CADSave up to $1,052 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
1.51ct Round
$317 CAD