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1.31ct H SI1 Round Lab Grown Diamond

ID • H/SI1 • IGI LG499105136

Shape and cutting style on the report: Round brilliant

Certificate IGI LG499105136

Diamond specifications and retailer prices

From $1,198 CAD
As of November 5, 2026
Save $4,000 CAD (77%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $5,199 CAD at MOH London · As of November 5, 2026
View at MOH London

About this 1.31ct lab-grown round diamond

This 1.31ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG499105136 or 499105136. Listed at 11 retailers as of November 5, 2026, with prices from $1,198 to $5,199, a $4,000 spread on the same certified stone. MOH London lists it at $5,199. 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

1.31
Carat
H
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.2°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG499105136
Dimensions6.95 × 6.99 × 4.36 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
6.95 mm6.99 mm1.31 ctH / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG499105136
Side View
Table 56.5%Crown 34.2°Girdle: MediumPavilion 41.1°Culet: NoneDepth 62.5%

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 5
Current: $5,199 CAD|Low: $1,198 CAD|High: $5,275 CAD|Avg: $2,281 CAD|-0.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 5, 2026
Retailer 3$1,198 CAD
Retailer 7$1,341 CAD
Retailer 4$1,369 CAD
Retailer 5$1,391 CAD
Retailer 8$1,634 CAD
Retailer 9$2,131 CAD
Retailer 6$2,237 CAD
Retailer 2$3,197 CAD
MOH London$5,199 CAD

12 data points across 9 retailers

11 retailers$1,198 CAD to $5,199 CAD

A
Cheapest Retailer
-
$1,198 CAD
B+
Retailer 2
-
$1,304 CAD
View
B+
Retailer 3
-
$1,341 CAD
View
Final sale: no returns
B+
Retailer 4
-
$1,369 CAD
View
Retailer 5
-
$1,391 CAD
View
Price last confirmed 25 days ago
B+
Retailer 6
-
$1,391 CAD
View
B+
Retailer 7
-
$1,634 CAD
View
B
Retailer 8
-
$2,237 CAD
View
B
Retailer 9
-
$3,197 CAD
View
B
Retailer 10
-
$3,909 CAD
View
Most Expensive
B
MOH London
LG499105136 · Nov 5
$5,199 CAD
£2,931 GBP
View
10 more retailers have this diamond
Prices start from $1,198 CADSave up to $4,000 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
1.31ct Round
$1,198 CAD