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Marquise|Natural|GIA

1.00ct I SI1 Marquise Natural Diamond

EX • I/SI1 • GIA 2564091915

Certificate GIA 2564091915

Diamond specifications and retailer prices

From $3,033 AUD
As of November 5, 2026
Save $2,834 AUD (48%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $7,308 AUD at NZ Jewellers · As of September 20, 2026
View at NZ Jewellers

About this 1ct natural marquise diamond

This 1ct natural marquise sits in the classic one-carat band, graded I 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 2564091915. Listed at 19 retailers as of November 4, 2026, with a 93% 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
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 2564091915
Dimensions10.08 × 5.30 × 3.07 mm
L/W Ratio1.90
Key to symbols
Twinning Wisp, Indented Natural, Natural
Top View
10.08 mm5.30 mm1.00 ctI / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceStrong
CertificateGIA 2564091915
Side View
Table 60.0%CrownGirdle: STK-THKPavilionCulet: NDepth 58.0%

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 5
Current: $7,020 AUD|Low: $2,898 AUD|High: $7,308 AUD|Avg: $4,093 AUD|-3.9%
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
November 5, 2026
Retailer 4$3,033 AUD
Retailer 10$3,097 AUD
Retailer 3$3,357 AUD
Retailer 13$3,357 AUD
Retailer 14$3,357 AUD
Retailer 6$3,513 AUD
Retailer 8$3,648 AUD
Retailer 15$3,874 AUD
Retailer 5$3,897 AUD
Retailer 12$3,926 AUD
Retailer 11$3,967 AUD
Retailer 2$4,097 AUD
Retailer 7$4,218 AUD
Retailer 9$5,867 AUD
NZ Jewellers$7,020 AUD

40 data points across 15 retailers

19 retailers$3,033 AUD to $5,867 AUD

A
Cheapest Retailer
-
$3,033 AUD
A
Retailer 2
-
$3,097 AUD
View
Final sale: no returns
Retailer 3
-
$3,357 AUD
View
Price last confirmed 7 days ago
B+
Retailer 4
-
$3,357 AUD
View
Retailer 5
-
$3,357 AUD
View
Price last confirmed 7 days ago
Retailer 6
-
$3,496 AUD
View
Price last confirmed 44 days ago
Retailer 7
-
$3,513 AUD
View
Price last confirmed 7 days ago
B+
Retailer 8
-
$3,600 AUD
View
B+
Retailer 9
-
$3,648 AUD
View
Retailer 10
-
$3,874 AUD
View
Price last confirmed 9 days ago
B+
Retailer 11
-
$3,897 AUD
View
Retailer 12
-
$3,926 AUD
View
Price last confirmed 8 days ago
B+
Retailer 13
-
$3,967 AUD
View
Retailer 14
-
$4,034 AUD
View
Price last confirmed 42 days ago
B+
Retailer 15
-
$4,097 AUD
View
Retailer 16
-
$4,218 AUD
View
Price last confirmed 29 days ago
B
Retailer 17
-
$5,867 AUD
View
Retailer 18
-
$7,020 AUD
View
Price last confirmed 9 days ago
Most Expensive
NZ Jewellers
31d49e0b-4810-4c2f-a3ed-6c7ff2302b66 · Sep 20
$7,308 AUD
$5,116 USD
View
Price last confirmed 45 days ago
18 more retailers have this diamond
Prices start from $3,033 AUDSave up to $2,834 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
$3,033 AUD