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Marquise|Natural|GIA

1.51ct D SI2 Marquise Natural Diamond

EX • D/SI2 • GIA 2245057622

Certificate GIA 2245057622

Diamond specifications and retailer prices

From $10,511 AUD
As of November 3, 2026
Save $6,449 AUD (38%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $16,960 AUD at Helzberg Diamonds · As of November 3, 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 D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2245057622. Listed at 12 retailers as of November 3, 2026, with prices from $10,511 to $16,960, a $6,449 spread on the same certified stone. Helzberg Diamonds lists it at $16,960. 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
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36.37°
Pavilion angle41.86°
OriginNatural
Grading LabGIA
CertificateGIA 2245057622
Dimensions11.44 × 6.05 × 3.87 mm
L/W Ratio1.89
Culet sizeNone
Top View
11.44 mm6.05 mm1.51 ctD / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2245057622
Side View
Table 58.0%Crown 36.37°Girdle: STK-THKPavilion 41.86°Culet: NoneDepth 64.1%

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 3
Current: $16,960 AUD|Low: $10,511 AUD|High: $18,267 AUD|Avg: $13,198 AUD|-7.2%
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 9$10,511 AUD
Retailer 11$10,747 AUD
Retailer 12$11,156 AUD
Retailer 5$11,226 AUD
Retailer 3$11,349 AUD
Retailer 4$11,505 AUD
Retailer 10$11,521 AUD
Retailer 8$13,048 AUD
Retailer 7$13,396 AUD
Retailer 6$14,633 AUD
Retailer 2$15,493 AUD
Helzberg Diamonds$16,960 AUD

39 data points across 12 retailers

12 retailers$10,511 AUD to $16,960 AUD

A
Cheapest Retailer
-
$10,511 AUD
A
Retailer 2
-
$10,747 AUD
View
A
Retailer 3
-
$11,156 AUD
View
A
Retailer 4
-
$11,226 AUD
View
A
Retailer 5
-
$11,349 AUD
View
A
Retailer 6
-
$11,505 AUD
View
A
Retailer 7
-
$11,521 AUD
View
A
Retailer 8
-
$13,048 AUD
View
A
Retailer 9
-
$13,396 AUD
View
B+
Retailer 10
-
$14,633 AUD
View
B+
Retailer 11
-
$15,493 AUD
View
Most Expensive
B+
Helzberg Diamonds
XZRIIKLGLNMII · Nov 3
$16,960 AUD
$11,653 USD
View
11 more retailers have this diamond
Prices start from $10,511 AUDSave up to $6,449 AUD

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
$10,511 AUD