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Marquise|Natural|GIA

1.00ct E SI1 Marquise Natural Diamond

EX • E/SI1 • GIA 6552654453

Certificate GIA 6552654453

Diamond specifications and retailer prices

From $4,510 AUD
As of November 4, 2026
Save $4,067 AUD (47%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $8,577 AUD at Helzberg Diamonds · As of November 6, 2026
View at Helzberg Diamonds

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 6552654453. Listed at 15 retailers as of November 4, 2026, with prices from $4,510 to $8,577, a $4,067 spread on the same certified stone. Helzberg Diamonds lists it at $8,577. 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
FluorescenceNone
Crown angle35.79°
Pavilion angle41.05°
OriginNatural
Grading LabGIA
CertificateGIA 6552654453
Dimensions10.44 × 5.06 × 3.18 mm
L/W Ratio2.06
Culet sizeNone
Top View
10.44 mm5.06 mm1.00 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6552654453
Side View
Table 58.0%Crown 35.79°Girdle: MED-VTKPavilion 41.05°Culet: NoneDepth 62.8%

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 4
Current: $8,577 AUD|Low: $4,510 AUD|High: $8,577 AUD|Avg: $5,908 AUD|+4.0%
Helzberg Diamonds
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 11$4,510 AUD
Retailer 9$4,620 AUD
Retailer 6$4,633 AUD
Retailer 12$4,863 AUD
Retailer 13$4,871 AUD
Retailer 8$5,230 AUD
Retailer 5$5,431 AUD
Retailer 3$5,758 AUD
Retailer 4$5,847 AUD
Retailer 7$5,995 AUD
Retailer 2$6,258 AUD
Retailer 14$7,607 AUD
Retailer 10$8,092 AUD
Helzberg Diamonds$8,577 AUD

34 data points across 14 retailers

15 retailers$4,510 AUD to $8,577 AUD

A
Cheapest Retailer
-
$4,510 AUD
A
Retailer 2
-
$4,620 AUD
View
A
Retailer 3
-
$4,633 AUD
View
A
Retailer 4
-
$4,863 AUD
View
B+
Retailer 5
-
$4,871 AUD
View
B+
Retailer 6
-
$5,230 AUD
View
B+
Retailer 7
-
$5,431 AUD
View
B+
Retailer 8
-
$5,758 AUD
View
B+
Retailer 9
-
$5,847 AUD
View
B+
Retailer 10
-
$5,995 AUD
View
B
Retailer 11
-
$6,203 AUD
View
B+
Retailer 12
-
$6,258 AUD
View
B
Retailer 13
-
$7,607 AUD
View
B
Retailer 14
-
$8,092 AUD
View
Most Expensive
B
Helzberg Diamonds
XZRMLLIMLKKLJ · Nov 6
$8,577 AUD
$6,004 USD
View
14 more retailers have this diamond
Prices start from $4,510 AUDSave up to $4,067 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
$4,510 AUD