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Marquise|Natural|GIA

1.51ct I SI2 Marquise Natural Diamond

EX • I/SI2 • GIA 7566682513

Certificate GIA 7566682513

Diamond specifications and retailer prices

From $9,247 AUD
SGD 8,757 SGD
As of November 1, 2026
Save $5,676 AUD (38%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $14,923 AUD at Helzberg Diamonds · As of November 1, 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 I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 7566682513. Listed at 14 retailers as of November 1, 2026, with prices from $9,247 to $14,923, a $5,676 spread on the same certified stone. Helzberg Diamonds lists it at $14,923. 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
I
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.21°
Pavilion angle38.5°
OriginNatural
Grading LabGIA
CertificateGIA 7566682513
Dimensions11.51 × 6.08 × 3.55 mm
L/W Ratio1.89
Culet sizeNone
Top View
11.51 mm6.08 mm1.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7566682513
Side View
Table 61.0%Crown 34.21°Girdle: MED-THKPavilion 38.5°Culet: NDepth 58.3%

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 1
Current: $14,923 AUD|Low: $9,247 AUD|High: $14,923 AUD|Avg: $11,187 AUD
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 2, 2026
Retailer 11$9,247 AUD
Retailer 5$9,592 AUD
Retailer 10$9,653 AUD
Retailer 8$9,785 AUD
Retailer 9$9,918 AUD
Retailer 6$10,201 AUD
Retailer 3$10,316 AUD
Retailer 4$11,544 AUD
Retailer 12$11,631 AUD
Retailer 13$11,702 AUD
Retailer 2$11,778 AUD
Retailer 7$13,108 AUD
Helzberg Diamonds$14,923 AUD

12 data points across 13 retailers

14 retailers$9,247 AUD to $14,923 AUD

A
Cheapest Retailer
-
$9,247 AUD
SGD 8,757 SGD
B+
Retailer 2
-
$9,592 AUD
$6,722 USD
View
B+
Retailer 3
-
$9,626 AUD
SGD 9,116 SGD
View
B+
Retailer 4
-
$9,653 AUD
$6,765 USD
View
B+
Retailer 5
-
$9,785 AUD
$6,857 USD
View
B+
Retailer 6
-
$9,918 AUD
$6,951 USD
View
B+
Retailer 7
-
$10,201 AUD
£5,629 GBP
View
B+
Retailer 8
-
$10,316 AUD
$7,230 USD
View
B+
Retailer 9
-
$11,544 AUD
$8,090 USD
View
B+
Retailer 10
-
$11,631 AUD
$8,151 USD
View
B+
Retailer 11
-
$11,702 AUD
$8,201 USD
View
Price last confirmed 7 days ago
B+
Retailer 12
-
$11,778 AUD
€7,861 EUR
View
B
Retailer 13
-
$13,108 AUD
$9,186 USD
View
Most Expensive
B
Helzberg Diamonds
XZRNLMMMOILHJ · Nov 1
$14,923 AUD
$10,458 USD
View
13 more retailers have this diamond
Prices start from $9,247 AUDSave up to $5,676 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
$9,247 AUD