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Marquise|Natural|GIA

1.00ct J SI1 Marquise Natural Diamond

EX • J/SI1 • GIA 2556243794

Certificate GIA 2556243794

Diamond specifications and retailer prices

From $2,787 AUD
As of November 6, 2026
Save $3,749 AUD (57%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $7,823 AUD at NZ Jewellers · As of September 30, 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 2556243794. Listed at 19 retailers as of November 4, 2026, with a 135% 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
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 2556243794
Dimensions9.61 × 5.14 × 3.30 mm
L/W Ratio1.87
Top View
9.61 mm5.14 mm1.00 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 2556243794
Side View
Table 63.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 64.3%

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: $7,823 AUD|Low: $2,787 AUD|High: $7,823 AUD|Avg: $4,715 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 7, 2026
Retailer 4$2,787 AUD
Retailer 8$3,282 AUD
Retailer 10$3,452 AUD
Retailer 3$3,915 AUD
Retailer 2$3,947 AUD
Retailer 11$4,192 AUD
Retailer 5$4,567 AUD
Retailer 7$4,670 AUD
Retailer 9$5,385 AUD
Retailer 6$6,536 AUD
NZ Jewellers$7,823 AUD

35 data points across 11 retailers

19 retailers$2,787 AUD to $6,536 AUD

A
Cheapest Retailer
-
$2,787 AUD
B+
Retailer 2
-
$3,282 AUD
View
B+
Retailer 3
-
$3,350 AUD
View
B+
Retailer 4
-
$3,416 AUD
View
B+
Retailer 5
-
$3,452 AUD
View
Final sale: no returns
B
Retailer 6
-
$3,704 AUD
View
Retailer 7
-
$3,742 AUD
View
Price last confirmed 46 days ago
Retailer 8
-
$3,742 AUD
View
Price last confirmed 26 days ago
Retailer 9
-
$3,742 AUD
View
Price last confirmed 30 days ago
B
Retailer 10
-
$3,947 AUD
View
Retailer 11
-
$4,192 AUD
View
Price last confirmed 31 days ago
B
Retailer 12
-
$4,302 AUD
View
Retailer 13
-
$4,318 AUD
View
Price last confirmed 46 days ago
Retailer 14
-
$4,318 AUD
View
Price last confirmed 29 days ago
B
Retailer 15
-
$4,567 AUD
View
B
Retailer 16
-
$4,670 AUD
View
Retailer 17
-
$5,385 AUD
View
Price last confirmed 11 days ago
B
Retailer 18
-
$6,536 AUD
View
Most Expensive
NZ Jewellers
24ef520f-79b3-42a4-b61e-99c23dea28c3 · Sep 30
$7,823 AUD
$5,375 USD
View
Price last confirmed 37 days ago
18 more retailers have this diamond
Prices start from $2,787 AUDSave up to $3,749 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
$2,787 AUD