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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 $6,271 USD
SGD 8,474 SGD
As of November 1, 2026
Save $4,024 USD (39%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $10,295 USD 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 $6,271 to $10,295, a $4,024 spread on the same certified stone. Helzberg Diamonds lists it at $10,295. 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
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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $10,295 USD|Low: $6,271 USD|High: $10,753 USD|Avg: $7,803 USD|-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 8$6,271 USD
Retailer 4$6,401 USD
Retailer 9$6,528 USD
Retailer 10$6,636 USD
Retailer 7$6,727 USD
Retailer 5$6,920 USD
Retailer 3$7,844 USD
Retailer 11$7,899 USD
Retailer 12$7,963 USD
Retailer 2$7,991 USD
Retailer 6$8,890 USD
Helzberg Diamonds$10,295 USD

32 data points across 12 retailers

12 retailers$6,271 USD to $10,295 USD

A
Cheapest Retailer
-
$6,271 USD
SGD 8,474 SGD
A
Retailer 2
-
$6,401 USD
View
A
Retailer 3
-
$6,528 USD
SGD 8,822 SGD
View
A
Retailer 4
-
$6,636 USD
View
A
Retailer 5
-
$6,727 USD
View
A
Retailer 6
-
$6,920 USD
£5,449 GBP
View
B+
Retailer 7
-
$7,844 USD
View
B+
Retailer 8
-
$7,899 USD
View
B+
Retailer 9
-
$7,963 USD
View
B+
Retailer 10
-
$7,991 USD
€7,610 EUR
View
B+
Retailer 11
-
$8,890 USD
View
Most Expensive
B
Helzberg Diamonds
XZRHLLOOJIHKP · Nov 2
$10,295 USD
View
11 more retailers have this diamond
Prices start from $6,271 USDSave up to $4,024 USD

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
$6,271 USD