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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 $11,145 NZD
SGD 8,474 SGD
As of November 1, 2026
Save $7,152 NZD (39%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $18,297 NZD 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 $11,145 to $18,297, a $7,152 spread on the same certified stone. Helzberg Diamonds lists it at $18,297. 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: $18,297 NZD|Low: $11,145 NZD|High: $19,111 NZD|Avg: $13,831 NZD|-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 3, 2026
Retailer 9$11,145 NZD
Retailer 5$11,149 NZD
Retailer 10$11,603 NZD
Retailer 11$11,795 NZD
Retailer 8$11,956 NZD
Retailer 2$12,155 NZD
Retailer 4$13,941 NZD
Retailer 12$14,039 NZD
Retailer 3$14,153 NZD
Retailer 6$14,202 NZD
Retailer 7$15,800 NZD
Helzberg Diamonds$18,297 NZD

32 data points across 12 retailers

12 retailers$11,145 NZD to $18,297 NZD

A
Cheapest Retailer
-
$11,145 NZD
SGD 8,474 SGD
A
Retailer 2
-
$11,149 NZD
$6,273 USD
View
A
Retailer 3
-
$11,603 NZD
SGD 8,822 SGD
View
A
Retailer 4
-
$11,795 NZD
$6,636 USD
View
A
Retailer 5
-
$11,956 NZD
$6,727 USD
View
A
Retailer 6
-
$12,155 NZD
£5,385 GBP
View
B+
Retailer 7
-
$13,941 NZD
$7,844 USD
View
B+
Retailer 8
-
$14,039 NZD
$7,899 USD
View
Retailer 9
-
$14,153 NZD
$7,963 USD
View
Price last confirmed 7 days ago
B+
Retailer 10
-
$14,202 NZD
€7,610 EUR
View
B+
Retailer 11
-
$15,800 NZD
$8,890 USD
View
Most Expensive
B
Helzberg Diamonds
XZRHLLOOJIHKP · Nov 2
$18,297 NZD
$10,295 USD
View
11 more retailers have this diamond
Prices start from $11,145 NZDSave up to $7,152 NZD

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
$11,145 NZD