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Marquise|Natural|GIA

1.51ct M SI1 Marquise Natural Diamond

EX • M/SI1 • GIA 6541762945

Certificate GIA 6541762945

Diamond specifications and retailer prices

From $4,323 AUD
As of November 3, 2026
Save $3,409 AUD (44%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $7,731 AUD at NZ Jewellers · As of November 3, 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 SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6541762945. Listed at 6 retailers as of November 3, 2026, with prices from $4,323 to $7,731, a $3,409 spread on the same certified stone. NZ Jewellers lists it at $7,731. 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
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceStrong
Crown angle39.81°
Pavilion angle39.26°
OriginNatural
Grading LabGIA
CertificateGIA 6541762945
Dimensions10.82 × 5.87 × 3.82 mm
L/W Ratio1.84
Girdle conditionVery Thick
Key to symbols
Crystal, Natural
Top View
10.82 mm5.87 mm1.51 ctM / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceStrong
CertificateGIA 6541762945
Side View
Table 58.0%Crown 39.81°GirdlePavilion 39.26°CuletDepth 65.2%

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 3
Current: $7,731 AUD|Low: $4,323 AUD|High: $8,139 AUD|Avg: $5,614 AUD|-5.0%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 5, 2026
Retailer 4$4,323 AUD
Retailer 6$4,438 AUD
Retailer 3$4,445 AUD
Retailer 2$4,541 AUD
Retailer 5$4,608 AUD
NZ Jewellers$7,731 AUD
Retailer 7$8,123 AUD

32 data points across 7 retailers

6 retailers$4,323 AUD to $7,731 AUD

B+
Cheapest Retailer
-
$4,323 AUD
B+
Retailer 2
-
$4,438 AUD
View
B+
Retailer 3
-
$4,445 AUD
View
B+
Retailer 4
-
$4,541 AUD
View
B+
Retailer 5
-
$4,608 AUD
View
Most Expensive
C
NZ Jewellers
b4c3c89b-8a51-4fad-ba38-925304eea404 · Nov 3
$7,731 AUD
$5,312 USD
View
5 more retailers have this diamond
Prices start from $4,323 AUDSave up to $3,409 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
$4,323 AUD