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Marquise|Natural|GIA

1.51ct H SI2 Marquise Natural Diamond

EX • H/SI2 • GIA 1558832149

Certificate GIA 1558832149

Diamond specifications and retailer prices

From $8,948 AUD
SGD 8,474 SGD
As of November 1, 2026
Save $5,742 AUD (39%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $14,690 AUD at Helzberg Diamonds · As of November 2, 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 H 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 1558832149. Listed at 12 retailers as of November 1, 2026, with prices from $8,948 to $14,690, a $5,742 spread on the same certified stone. Helzberg Diamonds lists it at $14,690. 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
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle39.29°
Pavilion angle40.19°
OriginNatural
Grading LabGIA
CertificateGIA 1558832149
Dimensions11.14 × 5.89 × 3.80 mm
L/W Ratio1.89
Culet sizeNone
Top View
11.14 mm5.89 mm1.51 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1558832149
Side View
Table 60.0%Crown 39.29°Girdle: STK-VTKPavilion 40.19°Culet: NoneDepth 64.4%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $14,690 AUD|Low: $8,948 AUD|High: $15,343 AUD|Avg: $11,126 AUD|-4.3%
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 2, 2026
Retailer 9$8,948 AUD
Retailer 2$8,951 AUD
Retailer 10$9,315 AUD
Retailer 11$9,469 AUD
Retailer 8$9,599 AUD
Retailer 6$9,875 AUD
Retailer 4$11,193 AUD
Retailer 12$11,271 AUD
Retailer 3$11,363 AUD
Retailer 5$11,402 AUD
Retailer 7$12,685 AUD
Helzberg Diamonds$14,690 AUD

31 data points across 12 retailers

12 retailers$8,948 AUD to $14,690 AUD

A
Cheapest Retailer
-
$8,948 AUD
SGD 8,474 SGD
A
Retailer 2
-
$8,951 AUD
$6,273 USD
View
A
Retailer 3
-
$9,315 AUD
SGD 8,822 SGD
View
A
Retailer 4
-
$9,469 AUD
$6,636 USD
View
A
Retailer 5
-
$9,599 AUD
$6,727 USD
View
A
Retailer 6
-
$9,875 AUD
£5,449 GBP
View
B+
Retailer 7
-
$11,193 AUD
$7,844 USD
View
B+
Retailer 8
-
$11,271 AUD
$7,899 USD
View
B+
Retailer 9
-
$11,363 AUD
$7,963 USD
View
B+
Retailer 10
-
$11,402 AUD
€7,610 EUR
View
B+
Retailer 11
-
$12,685 AUD
$8,890 USD
View
Most Expensive
B
Helzberg Diamonds
XZRHLLOOJIHKP · Nov 2
$14,690 AUD
$10,295 USD
View
11 more retailers have this diamond
Prices start from $8,948 AUDSave up to $5,742 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
$8,948 AUD