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Marquise|Natural|GIA

1.03ct D SI1 Marquise Natural Diamond

EX • D/SI1 • GIA 1558400654

Certificate GIA 1558400654

Diamond specifications and retailer prices

From $4,484 AUD
As of November 6, 2026
Save $1,645 AUD (27%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $6,129 AUD at Blue Nile · As of November 5, 2026
View at Blue Nile

About this 1.03ct natural marquise diamond

This 1.03ct natural marquise sits in the classic one-carat band, graded D 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 1558400654. Listed at 7 retailers as of November 5, 2026, with prices from $4,484 to $6,129, a $1,645 spread on the same certified stone. Blue Nile lists it at $6,129. 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

1.03
Carat
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1558400654
Dimensions10.10 × 5.27 × 3.33 mm
L/W Ratio1.92
Culet sizeNone
Key to symbols
Crystal, Cloud, Needle
Top View
10.10 mm5.27 mm1.03 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1558400654
Side View
Table 63.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 63.1%

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 6
Current: $6,129 AUD|Low: $4,484 AUD|High: $6,340 AUD|Avg: $5,346 AUD|-3.3%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 2$4,484 AUD
Retailer 4$5,143 AUD
Retailer 5$5,279 AUD
Retailer 6$5,426 AUD
Retailer 3$5,450 AUD
Blue Nile$6,129 AUD

46 data points across 6 retailers

7 retailers$4,484 AUD to $6,129 AUD

A
Cheapest Retailer
-
$4,484 AUD
B+
Retailer 2
-
$5,143 AUD
View
B+
Retailer 3
-
$5,279 AUD
View
Final sale: no returns
B+
Retailer 4
-
$5,426 AUD
View
B+
Retailer 5
-
$5,450 AUD
View
B+
Retailer 6
-
$5,708 AUD
View
Most Expensive
B+
Blue Nile
29298314 · Nov 5
$6,129 AUD
$4,211 USD
View
6 more retailers have this diamond
Prices start from $4,484 AUDSave up to $1,645 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
1.03ct Marquise
$4,484 AUD