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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 $3,638 NZD
As of November 3, 2026
Save $3,273 NZD (47%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $6,911 NZD at Helzberg Diamonds · As of November 3, 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 November 3, 2026, with prices from $3,638 to $6,911, a $3,273 spread on the same certified stone. Helzberg Diamonds lists it at $6,911. 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: Nov 3
Current: $6,911 NZD|Low: $3,624 NZD|High: $7,350 NZD|Avg: $4,771 NZD|-6.0%
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
November 3, 2026
Retailer 7$3,638 NZD
Retailer 3$3,903 NZD
Retailer 4$3,936 NZD
Retailer 12$3,974 NZD
Retailer 13$4,038 NZD
Retailer 10$4,200 NZD
Retailer 11$4,255 NZD
Retailer 8$4,566 NZD
Retailer 5$4,658 NZD
Retailer 9$4,822 NZD
Retailer 2$4,957 NZD
Retailer 6$6,337 NZD
Helzberg Diamonds$6,911 NZD

41 data points across 13 retailers

13 retailers$3,638 NZD to $6,911 NZD

A
Cheapest Retailer
-
$3,638 NZD
A
Retailer 2
-
$3,903 NZD
View
A
Retailer 3
-
$3,936 NZD
View
A
Retailer 4
-
$3,974 NZD
View
A
Retailer 5
-
$4,038 NZD
View
A
Retailer 6
-
$4,200 NZD
View
A
Retailer 7
-
$4,255 NZD
View
A
Retailer 8
-
$4,566 NZD
View
A
Retailer 9
-
$4,658 NZD
View
A
Retailer 10
-
$4,822 NZD
View
A
Retailer 11
-
$4,957 NZD
View
B+
Retailer 12
-
$6,337 NZD
View
Most Expensive
B+
Helzberg Diamonds
XZRJLLLPLOOJG · Nov 3
$6,911 NZD
$3,887 USD
View
12 more retailers have this diamond
Prices start from $3,638 NZDSave up to $3,273 NZD

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
$3,638 NZD