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Round|Lab Grown|IGI

1.51ct I SI1 Round Lab Grown Diamond

EX • I/SI1 • IGI LG451056217

Shape and cutting style on the report: Round brilliant

Certificate IGI LG451056217

Diamond specifications and retailer prices

From $1,173 CAD
As of November 5, 2026
Save $5,977 CAD (84%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $7,150 CAD at MOH London · As of November 3, 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG451056217 or 451056217. Listed at 11 retailers as of November 3, 2026, with prices from $1,173 to $7,150, a $5,977 spread on the same certified stone. MOH London lists it at $7,150. 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
I
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451056217
Dimensions7.32 × 7.40 × 4.51 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.32 mm7.40 mm1.51 ctI / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG451056217
Side View
Table 61.0%Crown 36°Girdle: MED-STKPavilion 41.1°Culet: NoneDepth 61.4%

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: $7,150 CAD|Low: $1,173 CAD|High: $7,245 CAD|Avg: $3,557 CAD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 2$1,173 CAD
Retailer 3$1,919 CAD
Retailer 6$2,147 CAD
Retailer 4$2,225 CAD
Retailer 7$2,465 CAD
Retailer 9$3,045 CAD
Retailer 5$3,515 CAD
Retailer 8$4,148 CAD
Retailer 10$6,368 CAD
MOH London$7,150 CAD

14 data points across 10 retailers

11 retailers$1,173 CAD to $7,150 CAD

A
Cheapest Retailer
-
$1,173 CAD
B+
Retailer 2
-
$1,919 CAD
View
B+
Retailer 3
-
$2,087 CAD
View
B+
Retailer 4
-
$2,147 CAD
View
Final sale: no returns
B+
Retailer 5
-
$2,225 CAD
View
Retailer 6
-
$2,225 CAD
View
Price last confirmed 25 days ago
B
Retailer 7
-
$2,465 CAD
View
B
Retailer 8
-
$3,515 CAD
View
B
Retailer 9
-
$4,148 CAD
View
B
Retailer 10
-
$4,172 CAD
View
Most Expensive
B
MOH London
LG451056217 · Nov 3
$7,150 CAD
£4,031 GBP
View
10 more retailers have this diamond
Prices start from $1,173 CADSave up to $5,977 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
$1,173 CAD