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Marquise|Natural|GIA

1.00ct J SI1 Marquise Natural Diamond

ID • J/SI1 • GIA 2556947990

Certificate GIA 2556947990

Diamond specifications and retailer prices

From $2,966 AUD
As of November 6, 2026
Save $3,643 AUD (55%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $8,155 AUD at NZ Jewellers · As of October 6, 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 2556947990. Listed at 21 retailers as of November 2, 2026, with a 123% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2556947990
Dimensions9.73 × 5.17 × 3.30 mm
L/W Ratio1.88
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Cloud, Twinning Wisp, Crystal, Needle
Top View
9.73 mm5.17 mm1.00 ctJ / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2556947990
Side View
Table 60.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 63.9%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $5,865 AUD|Low: $2,966 AUD|High: $6,906 AUD|Avg: $4,111 AUD|-2.2%
Retailer 1
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
November 6, 2026
Retailer 4$2,966 AUD
Retailer 5$3,037 AUD
Retailer 14$3,154 AUD
Retailer 3$3,413 AUD
Retailer 12$3,474 AUD
Retailer 6$3,486 AUD
Retailer 13$3,489 AUD
Retailer 7$3,660 AUD
Retailer 9$3,969 AUD
Retailer 2$4,334 AUD
Retailer 8$4,449 AUD
Retailer 10$4,605 AUD
Retailer 1$5,865 AUD
Retailer 11$6,609 AUD

27 data points across 14 retailers

21 retailers$2,966 AUD to $6,609 AUD

A
Cheapest Retailer
-
$2,966 AUD
Retailer 2
-
$3,037 AUD
View
Price last confirmed 17 days ago
B+
Retailer 3
-
$3,154 AUD
View
Final sale: no returns
B+
Retailer 4
-
$3,413 AUD
View
B+
Retailer 5
-
$3,474 AUD
View
B+
Retailer 6
-
$3,486 AUD
View
B+
Retailer 7
-
$3,489 AUD
View
B+
Retailer 8
-
$3,660 AUD
View
Retailer 9
-
$3,900 AUD
View
Price last confirmed 31 days ago
Retailer 10
-
$3,900 AUD
View
Price last confirmed 30 days ago
B+
Retailer 11
-
$3,969 AUD
View
Retailer 12
-
$4,117 AUD
View
Price last confirmed 37 days ago
B
Retailer 13
-
$4,334 AUD
View
Retailer 14
-
$4,369 AUD
View
Price last confirmed 31 days ago
B+
Retailer 15
-
$4,449 AUD
View
Retailer 16
-
$4,500 AUD
View
Price last confirmed 29 days ago
Retailer 17
-
$4,574 AUD
View
Price last confirmed 62 days ago
B
Retailer 18
-
$4,605 AUD
View
B
Retailer 19
-
$5,865 AUD
View
B
Retailer 20
-
$6,609 AUD
View
Most Expensive
NZ Jewellers
d63d4123-be0c-4f0a-ac4c-091201eb873a · Oct 6
$8,155 AUD
$5,603 USD
View
Price last confirmed 31 days ago
20 more retailers have this diamond
Prices start from $2,966 AUDSave up to $3,643 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.

A
1.00ct Marquise
$2,966 AUD