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Round|Lab Grown|IGI

1.21ct I SI1 Round Lab Grown Diamond

ID • I/SI1 • IGI LG447099659

Shape and cutting style on the report: Round brilliant

Certificate IGI LG447099659

Diamond specifications and retailer prices

From $740 CAD
As of November 5, 2026
Save $5,626 CAD (88%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $6,366 CAD at MOH London · As of November 5, 2026
View at MOH London

About this 1.21ct lab-grown round diamond

This 1.21ct lab-grown round sits in the classic one-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG447099659 or 447099659. Listed at 13 retailers as of November 5, 2026, with prices from $740 to $6,366, a $5,626 spread on the same certified stone. MOH London lists it at $6,366. 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

1.21
Carat
I
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.3°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG447099659
Dimensions6.94 × 6.96 × 4.14 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
6.94 mm6.96 mm1.21 ctI / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG447099659
Side View
Table 56.5%Crown 33.3°Girdle: THN-MEDPavilion 40.2°Culet: NoneDepth 59.5%

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 5
Current: $6,366 CAD|Low: $740 CAD|High: $6,467 CAD|Avg: $2,976 CAD|-1.3%
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
November 6, 2026
Retailer 9$740 CAD
Retailer 8$1,926 CAD
Retailer 13$2,096 CAD
Retailer 3$2,156 CAD
Retailer 10$2,235 CAD
Retailer 12$2,235 CAD
Retailer 4$2,472 CAD
Retailer 2$2,908 CAD
Retailer 5$3,039 CAD
Retailer 11$3,528 CAD
Retailer 7$3,817 CAD
Retailer 6$4,056 CAD
Retailer 14$4,188 CAD
MOH London$6,366 CAD

44 data points across 14 retailers

13 retailers$740 CAD to $6,366 CAD

A
Cheapest Retailer
-
$740 CAD
B+
Retailer 2
-
$1,926 CAD
View
B+
Retailer 3
-
$2,096 CAD
View
B+
Retailer 4
-
$2,156 CAD
View
Final sale: no returns
B+
Retailer 5
-
$2,235 CAD
View
Retailer 6
-
$2,235 CAD
View
Price last confirmed 25 days ago
B
Retailer 7
-
$2,472 CAD
View
B+
Retailer 8
-
$2,908 CAD
View
B
Retailer 9
-
$3,528 CAD
View
Retailer 10
-
$3,817 CAD
View
Price last confirmed 8 days ago
B
Retailer 11
-
$4,056 CAD
View
B
Retailer 12
-
$4,188 CAD
View
Most Expensive
B
MOH London
LG447099659 · Nov 5
$6,366 CAD
£3,589 GBP
View
12 more retailers have this diamond
Prices start from $740 CADSave up to $5,626 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
1.21ct Round
$740 CAD