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Marquise|Natural|GIA

1.00ct J SI1 Marquise Natural Diamond

EX • J/SI1 • GIA 6555512678

Certificate GIA 6555512678

Diamond specifications and retailer prices

From $3,027 AUD
As of November 6, 2026
Save $4,395 AUD (59%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $7,423 AUD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1ct natural marquise diamond

This 1ct natural marquise sits in the classic one-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 6555512678. Listed at 18 retailers as of November 5, 2026, with prices from $3,027 to $7,423, a $4,395 spread on the same certified stone. NZ Jewellers lists it at $7,423. 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

1.00
Carat
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37°
OriginNatural
Grading LabGIA
CertificateGIA 6555512678
Dimensions9.77 × 5.25 × 3.39 mm
L/W Ratio1.86
Culet sizeNone
Key to symbols
Feather, Crystal, Pinpoint, Knot
Top View
9.77 mm5.25 mm1.00 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6555512678
Side View
Table 61.0%Crown 37°Girdle: STK-VTKPavilionCulet: NDepth 64.6%

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 6
Current: $7,423 AUD|Low: $3,027 AUD|High: $7,556 AUD|Avg: $4,092 AUD|-1.8%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
November 6, 2026
Retailer 9$3,027 AUD
Retailer 4$3,208 AUD
Retailer 5$3,276 AUD
Retailer 2$3,443 AUD
Retailer 14$3,529 AUD
Retailer 7$3,551 AUD
Retailer 17$3,551 AUD
Retailer 6$3,714 AUD
Retailer 3$3,753 AUD
Retailer 11$3,756 AUD
Retailer 16$3,851 AUD
Retailer 8$3,857 AUD
Retailer 15$4,097 AUD
Retailer 10$4,333 AUD
Retailer 13$4,414 AUD
Retailer 12$6,203 AUD
NZ Jewellers$7,423 AUD

27 data points across 17 retailers

18 retailers$3,027 AUD to $7,423 AUD

B+
Cheapest Retailer
-
$3,027 AUD
B+
Retailer 2
-
$3,208 AUD
View
B+
Retailer 3
-
$3,276 AUD
View
Final sale: no returns
B+
Retailer 4
-
$3,443 AUD
View
B+
Retailer 5
-
$3,529 AUD
View
B+
Retailer 6
-
$3,551 AUD
View
Retailer 7
-
$3,551 AUD
View
Price last confirmed 9 days ago
B+
Retailer 8
-
$3,714 AUD
View
B+
Retailer 9
-
$3,753 AUD
View
B+
Retailer 10
-
$3,756 AUD
View
B
Retailer 11
-
$3,851 AUD
View
B
Retailer 12
-
$3,857 AUD
View
B+
Retailer 13
-
$4,097 AUD
View
B
Retailer 14
-
$4,333 AUD
View
B
Retailer 15
-
$4,414 AUD
View
Retailer 16
-
$4,621 AUD
View
Price last confirmed 31 days ago
B
Retailer 17
-
$6,203 AUD
View
Most Expensive
B
NZ Jewellers
71be0534-a66f-4f59-9929-7973de153c9d · Nov 5
$7,423 AUD
$5,100 USD
View
17 more retailers have this diamond
Prices start from $3,027 AUDSave up to $4,395 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+
1.00ct Marquise
$3,027 AUD