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Marquise|Natural|GIA

1.51ct M SI2 Marquise Natural Diamond

EX • M/SI2 • GIA 6522134054

Certificate GIA 6522134054

Diamond specifications and retailer prices

From $4,665 AUD
As of November 4, 2026
Save $5,825 AUD (56%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $10,489 AUD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise sits in the one-and-a-half to two carat band, graded M colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6522134054. Listed at 10 retailers as of November 4, 2026, with prices from $4,665 to $10,489, a $5,825 spread on the same certified stone. NZ Jewellers lists it at $10,489. 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
M
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle34.72°
Pavilion angle39.79°
OriginNatural
Grading LabGIA
CertificateGIA 6522134054
Dimensions11.57 × 6.12 × 3.74 mm
L/W Ratio1.89
Culet sizeNone
Top View
11.57 mm6.12 mm1.51 ctM / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 6522134054
Side View
Table 57.0%Crown 34.72°Girdle: THN-THKPavilion 39.79°Culet: NoneDepth 61.1%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $10,489 AUD|Low: $3,937 AUD|High: $10,489 AUD|Avg: $5,904 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 4$3,937 AUD
Retailer 5$4,665 AUD
Retailer 8$4,669 AUD
Retailer 3$4,842 AUD
Retailer 7$5,455 AUD
Retailer 9$5,455 AUD
Retailer 6$5,664 AUD
Retailer 12$5,736 AUD
Retailer 10$6,293 AUD
Retailer 2$6,385 AUD
Retailer 11$7,163 AUD
NZ Jewellers$10,489 AUD

20 data points across 12 retailers

10 retailers$4,665 AUD to $10,489 AUD

B+
Cheapest Retailer
-
$4,665 AUD
B+
Retailer 2
-
$4,669 AUD
View
B+
Retailer 3
-
$4,842 AUD
View
Retailer 4
-
$5,455 AUD
View
Price last confirmed 8 days ago
B
Retailer 5
-
$5,455 AUD
View
B
Retailer 6
-
$5,664 AUD
View
B
Retailer 7
-
$5,736 AUD
View
B
Retailer 8
-
$6,293 AUD
View
B
Retailer 9
-
$6,385 AUD
View
Most Expensive
C
NZ Jewellers
5b1ab9ef-ea8d-46d9-8710-81a354d94ae7 · Nov 5
$10,489 AUD
$7,207 USD
View
9 more retailers have this diamond
Prices start from $4,665 AUDSave up to $5,825 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.

B+
1.51ct Marquise
$4,665 AUD