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Marquise|Natural|GIA

1.00ct G SI1 Marquise Natural Diamond

EX • G/SI1 • GIA 1558855136

Certificate GIA 1558855136

Diamond specifications and retailer prices

From $4,090 AUD
As of November 6, 2026
Save $1,272 AUD (24%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $5,361 AUD at Michael Trio · As of November 6, 2026
View at Michael Trio

About this 1ct natural marquise diamond

This 1ct natural marquise sits in the classic one-carat band, graded G 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 1558855136. Listed at 6 retailers as of November 6, 2026, with prices from $4,090 to $5,361, a $1,272 spread on the same certified stone. Michael Trio lists it at $5,361. 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
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1558855136
Dimensions9.93 × 5.17 × 3.29 mm
L/W Ratio1.92
Culet sizeNone
Key to symbols
Cloud, Crystal, Feather, Needle, Knot, Indented Natural
Top View
9.93 mm5.17 mm1.00 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1558855136
Side View
Table 64.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 63.6%

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: $5,361 AUD|Low: $4,090 AUD|High: $5,470 AUD|Avg: $4,900 AUD|-2.0%
Michael Trio
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 6, 2026
Retailer 2$4,090 AUD
Retailer 4$4,653 AUD
Retailer 3$4,970 AUD
Retailer 5$5,295 AUD
Michael Trio$5,361 AUD

46 data points across 5 retailers

6 retailers$4,090 AUD to $5,361 AUD

A
Cheapest Retailer
-
$4,090 AUD
B+
Retailer 2
-
$4,653 AUD
View
B+
Retailer 3
-
$4,970 AUD
View
B+
Retailer 4
-
$5,222 AUD
View
B
Retailer 5
-
$5,295 AUD
View
Most Expensive
B
Michael Trio
2491329060 · Nov 6
$5,361 AUD
SGD 4,978 SGD
View
5 more retailers have this diamond
Prices start from $4,090 AUDSave up to $1,272 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
$4,090 AUD