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Marquise|Natural|GIA

1.00ct E SI1 Marquise Natural Diamond

EX • E/SI1 • GIA 1555023523

Certificate GIA 1555023523

Diamond specifications and retailer prices

From $4,023 AUD
As of November 6, 2026
Save $4,777 AUD (54%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: $9,837 AUD at NZ Jewellers · As of September 29, 2026
View at NZ Jewellers

About this 1ct natural marquise diamond

This 1ct natural marquise sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1555023523. Listed at 25 retailers as of November 4, 2026, with a 119% 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
E
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1555023523
Dimensions9.87 × 5.19 × 3.24 mm
L/W Ratio1.90
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Crystal, Cloud, Cavity, Needle, Indented Natural, Natural
Top View
9.87 mm5.19 mm1.00 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 1555023523
Side View
Table 62.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 62.4%

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: $4,166 AUD|Low: $4,023 AUD|High: $8,920 AUD|Avg: $5,895 AUD|-1.1%
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
November 6, 2026
Retailer 13$4,023 AUD
Retailer 1$4,166 AUD
Retailer 9$4,710 AUD
Retailer 5$4,773 AUD
Retailer 2$4,914 AUD
Retailer 6$5,118 AUD
Retailer 4$5,277 AUD
Retailer 7$5,428 AUD
Retailer 12$5,480 AUD
Retailer 11$6,153 AUD
Retailer 8$6,441 AUD
Retailer 3$8,172 AUD
Retailer 10$8,800 AUD

24 data points across 13 retailers

25 retailers$4,023 AUD to $8,800 AUD

A
Cheapest Retailer
-
$4,023 AUD
A
Retailer 2
-
$4,166 AUD
View
A
Retailer 3
-
$4,710 AUD
View
A
Retailer 4
-
$4,760 AUD
View
A
Retailer 5
-
$4,773 AUD
View
A
Retailer 6
-
$4,870 AUD
View
Final sale: no returns
A
Retailer 7
-
$4,914 AUD
View
B+
Retailer 8
-
$4,914 AUD
View
B+
Retailer 9
-
$5,070 AUD
View
A
Retailer 10
-
$5,118 AUD
View
Retailer 11
-
$5,277 AUD
View
Price last confirmed 8 days ago
Retailer 12
-
$5,277 AUD
View
Price last confirmed 21 days ago
B+
Retailer 13
-
$5,428 AUD
View
B+
Retailer 14
-
$5,480 AUD
View
B+
Retailer 15
-
$5,484 AUD
View
B+
Retailer 16
-
$5,485 AUD
View
B+
Retailer 17
-
$5,557 AUD
View
Retailer 18
-
$5,647 AUD
View
Price last confirmed 38 days ago
Retailer 19
-
$5,734 AUD
View
Price last confirmed 29 days ago
B+
Retailer 20
-
$6,153 AUD
View
B+
Retailer 21
-
$6,441 AUD
View
Retailer 22
-
$6,515 AUD
View
Price last confirmed 38 days ago
Retailer 23
-
$8,172 AUD
View
Price last confirmed 9 days ago
B
Retailer 24
-
$8,800 AUD
View
Most Expensive
NZ Jewellers
59feb36f-121a-4f76-9f73-37702296f960 · Sep 29
$9,837 AUD
$6,886 USD
View
Price last confirmed 37 days ago
24 more retailers have this diamond
Prices start from $4,023 AUDSave up to $4,777 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
$4,023 AUD