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Marquise|Natural|GIA

1.51ct G SI1 Marquise Natural Diamond

ID • G/SI1 • GIA 6545876663

Certificate GIA 6545876663

Diamond specifications and retailer prices

From $14,805 CAD
$10,595 USD
As of November 1, 2026
Save $8,638 CAD (37%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $23,443 CAD at Cape Diamonds · As of October 31, 2026
View at Cape 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 SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6545876663. Listed at 11 retailers as of October 31, 2026, with prices from $14,805 to $23,443, a $8,638 spread on the same certified stone. Cape Diamonds lists it at $23,443. 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
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle38.2°
Pavilion angle39.2°
OriginNatural
Grading LabGIA
CertificateGIA 6545876663
Dimensions11.47 × 6.07 × 3.73 mm
L/W Ratio1.89
Top View
11.47 mm6.07 mm1.51 ctG / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6545876663
Side View
Table 60.0%Crown 38.2°Girdle: THK-VTKPavilion 39.2°Culet: NoneDepth 61.4%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $23,443 CAD|Low: $14,805 CAD|High: $23,443 CAD|Avg: $18,219 CAD|+3.1%
Cape Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 10$14,805 CAD
Retailer 7$15,735 CAD
Retailer 4$17,260 CAD
Retailer 5$17,644 CAD
Retailer 8$17,653 CAD
Retailer 9$18,557 CAD
Retailer 11$18,557 CAD
Retailer 2$18,799 CAD
Retailer 6$19,035 CAD
Retailer 3$19,172 CAD
Cape Diamonds$23,443 CAD

42 data points across 11 retailers

11 retailers$14,805 CAD to $23,443 CAD

B+
Cheapest Retailer
-
$14,805 CAD
$10,595 USD
B
Retailer 2
-
$15,735 CAD
$11,260 USD
View
B+
Retailer 3
-
$17,260 CAD
£9,725 GBP
View
B
Retailer 4
-
$17,644 CAD
$12,626 USD
View
B
Retailer 5
-
$17,653 CAD
$12,633 USD
View
B
Retailer 6
-
$18,557 CAD
$13,280 USD
View
B
Retailer 7
-
$18,557 CAD
$13,280 USD
View
B
Retailer 8
-
$18,799 CAD
€12,812 EUR
View
B
Retailer 9
-
$19,035 CAD
$13,622 USD
View
Price last confirmed 7 days ago
B
Retailer 10
-
$19,172 CAD
$13,720 USD
View
Most Expensive
B
Cape Diamonds
cert_6545876663 · Oct 31
$23,443 CAD
ZAR 271,026 ZAR
View
10 more retailers have this diamond
Prices start from $14,805 CADSave up to $8,638 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.

B+
1.51ct Marquise
$14,805 CAD