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Marquise|Natural|IGI

1.51ct G SI2 Marquise Natural Diamond

ID • G/SI2 • IGI 811

Certificate IGI 811

Diamond specifications and retailer prices

From $5,311 CAD
As of November 4, 2026
Save $4,207 CAD (44%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $9,518 CAD at Helzberg Diamonds · As of November 6, 2026
View at Helzberg Diamonds

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI. Listed at 3 retailers as of November 4, 2026, with prices from $5,311 to $9,518, a $4,207 spread on the same certified stone. Helzberg Diamonds lists it at $9,518. 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
G
Color
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabIGI
CertificateIGI 811
Dimensions11.36 × 6.01 × 3.71 mm
L/W Ratio1.89
Top View
11.36 mm6.01 mm1.51 ctG / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 811
Side View
Table 57.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 61.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 4
Current: $9,518 CAD|Low: $4,676 CAD|High: $11,296 CAD|Avg: $7,640 CAD|-11.9%
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 5, 2026
Retailer 5$4,676 CAD
Retailer 3$5,311 CAD
Retailer 2$5,626 CAD
Helzberg Diamonds$9,518 CAD
Retailer 4$11,296 CAD

22 data points across 5 retailers

3 retailers$5,311 CAD to $9,518 CAD

A
Cheapest Retailer
-
$5,311 CAD
A
Retailer 2
-
$5,626 CAD
View
Most Expensive
A
Helzberg Diamonds
ZXZOIKMGKMIN · Nov 6
$9,518 CAD
$6,767 USD
View
2 more retailers have this diamond
Prices start from $5,311 CADSave up to $4,207 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 Marquise
$5,311 CAD