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Marquise|Natural|GIA

1.51ct J SI1 Marquise Natural Diamond

ID • J/SI1 • GIA 6552045873

Certificate GIA 6552045873

Diamond specifications and retailer prices

From $8,664 AUD
$6,072 USD
As of November 2, 2026
Save $7,781 AUD (47%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $16,445 AUD at NZ Jewellers · As of October 30, 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 J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6552045873. Listed at 9 retailers as of October 30, 2026, with prices from $8,664 to $16,445, a $7,781 spread on the same certified stone. NZ Jewellers lists it at $16,445. 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
J
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceFaint
Crown angle42.9°
Pavilion angle39.32°
OriginNatural
Grading LabGIA
CertificateGIA 6552045873
Dimensions10.50 × 5.90 × 3.98 mm
L/W Ratio1.78
Girdle conditionVery Thick
Key to symbols
Feather, Crystal, Cloud, Needle
Top View
10.50 mm5.90 mm1.51 ctJ / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6552045873
Side View
Table 56.0%Crown 42.9°Girdle: ThickPavilion 39.32°Culet: NoneDepth 67.5%

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 2
Current: $16,445 AUD|Low: $7,748 AUD|High: $16,445 AUD|Avg: $9,833 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 9$7,748 AUD
Retailer 11$8,609 AUD
Retailer 8$8,664 AUD
Retailer 7$9,111 AUD
Retailer 5$9,460 AUD
Retailer 10$9,689 AUD
Retailer 6$9,833 AUD
Retailer 4$9,984 AUD
Retailer 3$10,331 AUD
Retailer 2$14,486 AUD
NZ Jewellers$16,445 AUD

10 data points across 11 retailers

9 retailers$8,664 AUD to $16,445 AUD

Retailer 1
-
$7,748 AUD
$5,430 USD
Price last confirmed 12 days ago
B+
Retailer 2
-
$8,664 AUD
$6,072 USD
View
B+
Retailer 3
-
$9,111 AUD
$6,385 USD
View
B+
Retailer 4
-
$9,460 AUD
£5,220 GBP
View
Retailer 5
-
$9,689 AUD
$6,790 USD
View
Price last confirmed 11 days ago
B
Retailer 6
-
$9,833 AUD
$6,891 USD
View
B
Retailer 7
-
$9,984 AUD
$6,997 USD
View
B
Retailer 8
-
$14,486 AUD
£7,994 GBP
View
Most Expensive
B
NZ Jewellers
fa36bc89-12e4-4b27-8be9-f83b8580a03e · Oct 30
$16,445 AUD
$11,525 USD
View
8 more retailers have this diamond
Prices start from $8,664 AUDSave up to $7,781 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
$8,664 AUD