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Round|Lab Grown|IGI

1.31ct I SI1 Round Lab Grown Diamond

EX • I/SI1 • IGI LG451055654

Shape and cutting style on the report: Round brilliant

Certificate IGI LG451055654

Diamond specifications and retailer prices

From $1,048 CAD
$750 USD
As of October 30, 2026
Save $3,574 CAD (77%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $4,621 CAD at MOH London · As of October 26, 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG451055654 or 451055654. Listed at 11 retailers as of October 26, 2026, with prices from $1,048 to $4,621, a $3,574 spread on the same certified stone. MOH London lists it at $4,621. 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
I
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.2°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451055654
Dimensions7.11 × 7.14 × 4.32 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.11 mm7.14 mm1.31 ctI / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG451055654
Side View
Table 56.0%Crown 32.2°Girdle: THN-MEDPavilion 41.1°Culet: NoneDepth 60.8%

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: Oct 30
Current: $4,621 CAD|Low: $1,018 CAD|High: $4,671 CAD|Avg: $2,044 CAD|-0.9%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 30, 2026
Retailer 2$1,048 CAD
Retailer 5$1,062 CAD
Retailer 9$1,187 CAD
Retailer 6$1,231 CAD
Retailer 10$1,231 CAD
Retailer 8$1,481 CAD
Retailer 11$1,932 CAD
Retailer 7$1,992 CAD
Retailer 4$2,928 CAD
Retailer 3$3,523 CAD
MOH London$4,621 CAD

15 data points across 11 retailers

11 retailers$1,048 CAD to $4,621 CAD

A
Cheapest Retailer
-
$1,048 CAD
$750 USD
A
Retailer 2
-
$1,062 CAD
$760 USD
View
A
Retailer 3
-
$1,155 CAD
$827 USD
View
B+
Retailer 4
-
$1,187 CAD
$850 USD
View
Final sale: no returns
B+
Retailer 5
-
$1,231 CAD
$881 USD
View
Retailer 6
-
$1,231 CAD
$881 USD
View
Price last confirmed 18 days ago
B+
Retailer 7
-
$1,481 CAD
$1,060 USD
View
B
Retailer 8
-
$1,992 CAD
$1,426 USD
View
B
Retailer 9
-
$2,928 CAD
$2,096 USD
View
B
Retailer 10
-
$3,462 CAD
$2,478 USD
View
Most Expensive
B
MOH London
LG451055654 · Oct 26
$4,621 CAD
£2,605 GBP
View
10 more retailers have this diamond
Prices start from $1,048 CADSave up to $3,574 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
$1,048 CAD