Marquise|Natural|GIA

1.51ct I SI2 Marquise Natural Diamond

EX • I/SI2 • GIA 7566682513

Certificate GIA 7566682513

Diamond specifications and retailer prices

From $6,480 USD
SGD 8,757 SGD
As of November 1, 2026
Save $3,978 USD (38%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $10,458 USD 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 $6,480 to $10,458, a $3,978 spread on the same certified stone. Helzberg Diamonds lists it at $10,458. 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
Color
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: $10,458 USD|Low: $6,480 USD|High: $10,458 USD|Avg: $7,840 USD
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$6,480 USD
Retailer 5$6,722 USD
Retailer 10$6,765 USD
Retailer 8$6,857 USD
Retailer 9$6,951 USD
Retailer 6$7,149 USD
Retailer 3$7,230 USD
Retailer 4$8,090 USD
Retailer 12$8,151 USD
Retailer 13$8,201 USD
Retailer 2$8,254 USD
Retailer 7$9,186 USD
Helzberg Diamonds$10,458 USD

12 data points across 13 retailers

14 retailers$6,480 USD to $10,458 USD

A
Cheapest Retailer
-
$6,480 USD
SGD 8,757 SGD
B+
Retailer 2
-
$6,722 USD
View
B+
Retailer 3
-
$6,746 USD
SGD 9,116 SGD
View
B+
Retailer 4
-
$6,765 USD
View
B+
Retailer 5
-
$6,857 USD
View
B+
Retailer 6
-
$6,951 USD
View
B+
Retailer 7
-
$7,149 USD
£5,629 GBP
View
B+
Retailer 8
-
$7,230 USD
View
B+
Retailer 9
-
$8,090 USD
View
B+
Retailer 10
-
$8,151 USD
View
B+
Retailer 11
-
$8,201 USD
View
B+
Retailer 12
-
$8,254 USD
€7,861 EUR
View
B
Retailer 13
-
$9,186 USD
View
Most Expensive
B
Helzberg Diamonds
XZRNLMMMOILHJ · Nov 1
$10,458 USD
View
13 more retailers have this diamond
Prices start from $6,480 USDSave up to $3,978 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
$6,480 USD