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Marquise|Natural|GIA

1.00ct I SI1 Marquise Natural Diamond

EX • I/SI1 • GIA 6541818171

Certificate GIA 6541818171

Diamond specifications and retailer prices

From $4,246 AUD
As of November 4, 2026
Save $4,493 AUD (51%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $8,738 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 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 6541818171. Listed at 16 retailers as of November 4, 2026, with prices from $4,246 to $8,738, a $4,493 spread on the same certified stone. NZ Jewellers lists it at $8,738. 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
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6541818171
Dimensions9.77 × 5.26 × 3.19 mm
L/W Ratio1.86
Top View
9.77 mm5.26 mm1.00 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6541818171
Side View
Table 60.0%CrownGirdle: THK-XTKPavilionCulet: NoneDepth 60.6%

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 4
Current: $8,738 AUD|Low: $4,230 AUD|High: $8,738 AUD|Avg: $5,527 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
Retailer 14
Retailer 15
Retailer 16
November 5, 2026
Retailer 7$4,246 AUD
Retailer 12$4,544 AUD
Retailer 15$4,544 AUD
Retailer 14$4,718 AUD
Retailer 6$4,887 AUD
Retailer 4$5,157 AUD
Retailer 5$5,157 AUD
Retailer 9$5,190 AUD
Retailer 13$5,243 AUD
Retailer 3$5,328 AUD
Retailer 16$5,377 AUD
Retailer 11$5,511 AUD
Retailer 8$5,683 AUD
Retailer 2$6,121 AUD
Retailer 10$8,364 AUD
NZ Jewellers$8,738 AUD

44 data points across 16 retailers

16 retailers$4,246 AUD to $8,738 AUD

B+
Cheapest Retailer
-
$4,246 AUD
Retailer 2
-
$4,544 AUD
View
Price last confirmed 7 days ago
B+
Retailer 3
-
$4,544 AUD
View
B+
Retailer 4
-
$4,718 AUD
View
B
Retailer 5
-
$4,887 AUD
View
B+
Retailer 6
-
$5,157 AUD
View
B+
Retailer 7
-
$5,157 AUD
View
B+
Retailer 8
-
$5,190 AUD
View
B
Retailer 9
-
$5,243 AUD
View
B
Retailer 10
-
$5,328 AUD
View
Retailer 11
-
$5,377 AUD
View
Price last confirmed 32 days ago
B
Retailer 12
-
$5,511 AUD
View
Retailer 13
-
$5,683 AUD
View
Price last confirmed 13 days ago
B
Retailer 14
-
$6,121 AUD
View
B
Retailer 15
-
$8,364 AUD
View
Most Expensive
B
NZ Jewellers
8949f649-d9ed-47ef-bd18-7dc83a964ae4 · Nov 5
$8,738 AUD
$6,117 USD
View
15 more retailers have this diamond
Prices start from $4,246 AUDSave up to $4,493 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
$4,246 AUD