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Marquise|Natural|GIA

1.51ct H SI1 Marquise Natural Diamond

EX • H/SI1 • GIA 6555830427

Certificate GIA 6555830427

Diamond specifications and retailer prices

From $12,891 CAD
As of November 4, 2026
Save $11,627 CAD (47%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $24,518 CAD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise sits in the one-and-a-half to two carat band, graded H 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 6555830427. Listed at 22 retailers as of November 4, 2026, with prices from $12,891 to $24,518, a $11,627 spread on the same certified stone. NZ Jewellers lists it at $24,518. 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
H
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle39.8°
Pavilion angle39.44°
OriginNatural
Grading LabGIA
CertificateGIA 6555830427
Dimensions11.45 × 5.91 × 3.74 mm
L/W Ratio1.94
Culet sizeNone
Top View
11.45 mm5.91 mm1.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6555830427
Side View
Table 58.0%Crown 39.8°Girdle: STK-THKPavilion 39.44°Culet: NoneDepth 63.3%

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 4
Current: $15,738 CAD|Low: $12,891 CAD|High: $23,251 CAD|Avg: $17,723 CAD|-1.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 7, 2026
Retailer 6$12,891 CAD
Retailer 10$14,710 CAD
Retailer 1$15,738 CAD
Retailer 3$15,937 CAD
Retailer 8$15,979 CAD
Retailer 2$16,182 CAD
Retailer 11$16,408 CAD
Retailer 9$17,919 CAD
Retailer 7$18,459 CAD
Retailer 4$21,462 CAD
Retailer 5$22,914 CAD

46 data points across 11 retailers

22 retailers$12,891 CAD to $24,518 CAD

B+
Cheapest Retailer
-
$12,891 CAD
B+
Retailer 2
-
$13,648 CAD
View
B+
Retailer 3
-
$13,810 CAD
View
B
Retailer 4
-
$14,537 CAD
View
Retailer 5
-
$14,710 CAD
View
Price last confirmed 9 days ago
B
Retailer 6
-
$14,710 CAD
View
Final sale: no returns
B
Retailer 7
-
$15,738 CAD
View
B
Retailer 8
-
$15,937 CAD
View
Retailer 9
-
$15,979 CAD
View
Price last confirmed 15 days ago
B
Retailer 10
-
$16,182 CAD
View
B
Retailer 11
-
$16,408 CAD
View
B
Retailer 12
-
$17,203 CAD
View
B
Retailer 13
-
$17,203 CAD
View
B
Retailer 14
-
$17,526 CAD
View
B
Retailer 15
-
$17,779 CAD
View
B
Retailer 16
-
$17,919 CAD
View
B
Retailer 17
-
$18,388 CAD
View
B
Retailer 18
-
$18,459 CAD
View
Retailer 19
-
$19,355 CAD
View
Price last confirmed 15 days ago
B
Retailer 20
-
$21,462 CAD
View
B
Retailer 21
-
$22,914 CAD
View
Most Expensive
B
NZ Jewellers
ae7b53dc-56f9-4716-9037-2b4f7d008ff1 · Nov 5
$24,518 CAD
$17,431 USD
View
21 more retailers have this diamond
Prices start from $12,891 CADSave up to $11,627 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
$12,891 CAD