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Marquise|Natural|GIA

1.00ct E SI2 Marquise Natural Diamond

EX • E/SI2 • GIA 3555958830

Certificate GIA 3555958830

Diamond specifications and retailer prices

From $2,902 AUD
SGD 2,755 SGD
As of October 29, 2026
Save $2,744 AUD (49%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $5,646 AUD at Helzberg Diamonds · As of October 29, 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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 3555958830. Listed at 13 retailers as of October 29, 2026, with prices from $2,902 to $5,646, a $2,744 spread on the same certified stone. Helzberg Diamonds lists it at $5,646. 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
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle40°
Pavilion angle40.33°
OriginNatural
Grading LabGIA
CertificateGIA 3555958830
Dimensions9.82 × 5.18 × 3.32 mm
L/W Ratio1.90
Culet sizeNone
Top View
9.82 mm5.18 mm1.00 ctE / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 3555958830
Side View
Table 59.0%Crown 40°Girdle: STK-THKPavilion 40.33°Culet: NoneDepth 64.0%

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: Oct 29
Current: $5,646 AUD|Low: $2,902 AUD|High: $5,885 AUD|Avg: $3,830 AUD|-4.1%
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
October 30, 2026
Retailer 10$2,902 AUD
Retailer 9$3,125 AUD
Retailer 11$3,152 AUD
Retailer 7$3,182 AUD
Retailer 8$3,233 AUD
Retailer 2$3,408 AUD
Retailer 5$3,431 AUD
Retailer 12$3,726 AUD
Retailer 3$3,730 AUD
Retailer 4$3,927 AUD
Retailer 6$4,057 AUD
Retailer 13$5,172 AUD
Helzberg Diamonds$5,646 AUD

37 data points across 13 retailers

13 retailers$2,902 AUD to $5,646 AUD

A
Cheapest Retailer
-
$2,902 AUD
SGD 2,755 SGD
A
Retailer 2
-
$3,125 AUD
$2,195 USD
View
A
Retailer 3
-
$3,152 AUD
$2,214 USD
View
A
Retailer 4
-
$3,182 AUD
$2,235 USD
View
A
Retailer 5
-
$3,233 AUD
$2,271 USD
View
A
Retailer 6
-
$3,408 AUD
£1,885 GBP
View
A
Retailer 7
-
$3,431 AUD
SGD 3,257 SGD
View
A
Retailer 8
-
$3,726 AUD
$2,617 USD
View
A
Retailer 9
-
$3,730 AUD
$2,620 USD
View
A
Retailer 10
-
$3,927 AUD
$2,759 USD
View
A
Retailer 11
-
$4,057 AUD
€2,714 EUR
View
B+
Retailer 12
-
$5,172 AUD
$3,633 USD
View
Most Expensive
B+
Helzberg Diamonds
XZRJLLLPLOOJG · Oct 29
$5,646 AUD
$3,966 USD
View
12 more retailers have this diamond
Prices start from $2,902 AUDSave up to $2,744 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
$2,902 AUD