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Round|Lab Grown|IGI

1.51ct D SI1 Round Lab Grown Diamond

EX • D/SI1 • IGI LG731538751

Shape and cutting style on the report: Round brilliant

Certificate IGI LG731538751

Diamond specifications and retailer prices

From $293 CAD
As of November 5, 2026
Save $1,419 CAD (83%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $2,207 CAD at Brilliant Earth · As of October 18, 2026
View at Brilliant Earth

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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG731538751 or 731538751. Listed at 20 retailers as of November 4, 2026, with a 484% 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
D
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG731538751
Dimensions7.31 × 7.27 × 4.58 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
7.31 mm7.27 mm1.51 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG731538751
Side View
Table 56.0%Crown 36°Girdle: THN-MEDPavilion 40.8°Culet: NoneDepth 62.8%

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: $2,207 CAD|Low: $282 CAD|High: $2,207 CAD|Avg: $802 CAD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 5, 2026
Retailer 10$293 CAD
Retailer 3$365 CAD
Retailer 11$492 CAD
Retailer 2$564 CAD
Retailer 7$603 CAD
Retailer 4$665 CAD
Retailer 9$806 CAD
Retailer 8$888 CAD
Retailer 6$1,061 CAD
Retailer 5$1,455 CAD
Brilliant Earth$2,207 CAD

40 data points across 11 retailers

20 retailers$293 CAD to $1,712 CAD

A
Cheapest Retailer
-
$293 CAD
A
Retailer 2
-
$328 CAD
View
Final sale: no returns
A
Retailer 3
-
$341 CAD
View
Retailer 4
-
$365 CAD
View
Price last confirmed 12 days ago
A
Retailer 5
-
$365 CAD
View
B+
Retailer 6
-
$492 CAD
View
A
Retailer 7
-
$564 CAD
View
A
Retailer 8
-
$603 CAD
View
A
Retailer 9
-
$619 CAD
View
A
Retailer 10
-
$665 CAD
View
B+
Retailer 11
-
$721 CAD
View
B+
Retailer 12
-
$806 CAD
View
B+
Retailer 13
-
$888 CAD
View
B
Retailer 14
-
$1,061 CAD
View
B
Retailer 15
-
$1,172 CAD
View
Retailer 16
-
$1,176 CAD
View
Price last confirmed 9 days ago
B
Retailer 17
-
$1,244 CAD
View
B
Retailer 18
-
$1,455 CAD
View
B
Retailer 19
-
$1,712 CAD
View
Most Expensive
Brilliant Earth
16956960A · Oct 18
$2,207 CAD
$1,580 USD
View
Price last confirmed 18 days ago
19 more retailers have this diamond
Prices start from $293 CADSave up to $1,419 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
$293 CAD