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Marquise|Natural|GIA

1.00ct E SI1 Marquise Natural Diamond

EX • E/SI1 • GIA 6551185021

Certificate GIA 6551185021

Diamond specifications and retailer prices

From $5,473 AUD
As of November 5, 2026
Save $6,730 AUD (55%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $12,202 AUD at NZ Jewellers · As of November 5, 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 6551185021. Listed at 21 retailers as of November 5, 2026, with prices from $5,473 to $12,202, a $6,730 spread on the same certified stone. NZ Jewellers lists it at $12,202. 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
PolishVery Good
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6551185021
Dimensions10.31 × 5.06 × 3.18 mm
L/W Ratio2.04
Girdle conditionFaceted
Culet sizeNone
Top View
10.31 mm5.06 mm1.00 ctE / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6551185021
Side View
Table 56.0%CrownGirdle: VTK-ETKPavilionCulet: NoneDepth 62.8%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $12,202 AUD|Low: $5,584 AUD|High: $12,202 AUD|Avg: $7,619 AUD
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
November 6, 2026
Retailer 9$5,584 AUD
Retailer 12$5,960 AUD
Retailer 4$5,990 AUD
Retailer 11$6,014 AUD
Retailer 3$6,345 AUD
Retailer 13$6,345 AUD
Retailer 2$6,854 AUD
Retailer 5$6,911 AUD
Retailer 10$7,060 AUD
Retailer 8$7,892 AUD
Retailer 6$8,545 AUD
Retailer 7$11,124 AUD
NZ Jewellers$12,202 AUD

46 data points across 13 retailers

21 retailers$5,473 AUD to $12,202 AUD

B+
Cheapest Retailer
-
$5,473 AUD
B+
Retailer 2
-
$5,584 AUD
View
B+
Retailer 3
-
$5,791 AUD
View
B+
Retailer 4
-
$5,960 AUD
View
B+
Retailer 5
-
$5,990 AUD
View
B+
Retailer 6
-
$6,014 AUD
View
Retailer 7
-
$6,345 AUD
View
Price last confirmed 8 days ago
B
Retailer 8
-
$6,345 AUD
View
B
Retailer 9
-
$6,345 AUD
View
B+
Retailer 10
-
$6,854 AUD
View
B
Retailer 11
-
$6,911 AUD
View
Retailer 12
-
$7,060 AUD
View
Price last confirmed 28 days ago
B
Retailer 13
-
$7,128 AUD
View
B
Retailer 14
-
$7,128 AUD
View
B
Retailer 15
-
$7,321 AUD
View
B
Retailer 16
-
$7,371 AUD
View
Retailer 17
-
$7,734 AUD
View
Price last confirmed 14 days ago
B
Retailer 18
-
$7,892 AUD
View
B
Retailer 19
-
$8,545 AUD
View
B
Retailer 20
-
$11,124 AUD
View
Most Expensive
B
NZ Jewellers
f3e8fe6d-4665-4962-b68a-9e5acc960959 · Nov 5
$12,202 AUD
$8,542 USD
View
20 more retailers have this diamond
Prices start from $5,473 AUDSave up to $6,730 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.

B+
1.00ct Marquise
$5,473 AUD