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Marquise|Natural|GIA

1.51ct J SI1 Marquise Natural Diamond

ID • J/SI1 • GIA 6545855164

Certificate GIA 6545855164

Diamond specifications and retailer prices

From $8,305 AUD
$5,820 USD
As of November 1, 2026
Save $6,628 AUD (44%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $14,933 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 6545855164. Listed at 8 retailers as of October 30, 2026, with prices from $8,305 to $14,933, a $6,628 spread on the same certified stone. NZ Jewellers lists it at $14,933. 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
FluorescenceMedium
Crown angle41.63°
Pavilion angle40.51°
OriginNatural
Grading LabGIA
CertificateGIA 6545855164
Dimensions10.29 × 5.82 × 4.01 mm
L/W Ratio1.77
Girdle conditionExtremely Thick
Key to symbols
Twinning Wisp, Feather, Crystal, Cavity, Needle, Indented Natural
Top View
10.29 mm5.82 mm1.51 ctJ / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 6545855164
Side View
Table 58.0%Crown 41.63°Girdle: Very ThickPavilion 40.51°Culet: NoneDepth 68.9%

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 1
Current: $14,933 AUD|Low: $7,099 AUD|High: $14,933 AUD|Avg: $9,068 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 7$7,099 AUD
Retailer 9$7,866 AUD
Retailer 6$8,305 AUD
Retailer 3$8,590 AUD
Retailer 8$8,852 AUD
Retailer 2$8,928 AUD
Retailer 5$8,928 AUD
Retailer 10$9,232 AUD
Retailer 4$13,153 AUD
NZ Jewellers$14,933 AUD

8 data points across 10 retailers

8 retailers$8,305 AUD to $14,933 AUD

Retailer 1
-
$7,099 AUD
$4,975 USD
Price last confirmed 12 days ago
B+
Retailer 2
-
$8,305 AUD
$5,820 USD
View
B+
Retailer 3
-
$8,590 AUD
£4,740 GBP
View
Retailer 4
-
$8,852 AUD
$6,204 USD
View
Price last confirmed 11 days ago
Retailer 5
-
$8,928 AUD
$6,257 USD
View
B+
Retailer 6
-
$8,928 AUD
$6,257 USD
View
B
Retailer 7
-
$13,153 AUD
£7,258 GBP
View
Most Expensive
B
NZ Jewellers
0c44c79a-0461-465a-82d3-82391f0c0c93 · Oct 30
$14,933 AUD
$10,465 USD
View
7 more retailers have this diamond
Prices start from $8,305 AUDSave up to $6,628 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
$8,305 AUD