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Marquise|Natural|GIA

2.50ct G SI1 Marquise Natural Diamond

VG • G/SI1 • GIA 2557186863

Certificate GIA 2557186863

Diamond specifications and retailer prices

From $40,349 AUD
CA$39,137 CAD
As of November 2, 2026
Save $12,267 AUD (23%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $52,616 AUD at Cape Diamonds · As of November 1, 2026
View at Cape Diamonds

About this 2.5ct natural marquise diamond

This 2.5ct natural marquise sits in the two to three carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 2557186863. Listed at 2 retailers as of November 1, 2026, with prices from $40,349 to $52,616, a $12,267 spread on the same certified stone. Cape Diamonds lists it at $52,616. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

2.50
Carat
G
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceStrong
Crown angle39.53°
Pavilion angle39.86°
OriginNatural
Grading LabGIA
CertificateGIA 2557186863
Dimensions12.87 × 6.94 × 4.50 mm
L/W Ratio1.85
Culet sizeNone
Top View
12.87 mm6.94 mm2.50 ctG / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceStrong
CertificateGIA 2557186863
Side View
Table 56.0%Crown 39.53°Girdle: MED-VTKPavilion 39.86°Culet: NoneDepth 64.8%

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 2
Current: $52,616 AUD|Low: $24,884 AUD|High: $54,195 AUD|Avg: $39,015 AUD|+2.1%
Cape Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 3$24,884 AUD
Retailer 10$30,472 AUD
Retailer 9$33,270 AUD
Retailer 7$34,657 AUD
Retailer 6$34,775 AUD
Retailer 5$38,550 AUD
Retailer 11$39,139 AUD
Retailer 2$40,349 AUD
Retailer 4$48,521 AUD
Cape Diamonds$52,616 AUD
Retailer 8$54,195 AUD

8 data points across 11 retailers

2 retailers$40,349 AUD to $52,616 AUD

B+
Cheapest Retailer
-
$40,349 AUD
CA$39,137 CAD
Most Expensive
B
Cape Diamonds
cert_2557186863 · Nov 1
$52,616 AUD
ZAR 593,627 ZAR
View
1 more retailer has this diamond
Prices start from $40,349 AUDSave up to $12,267 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+
2.50ct Marquise
$40,349 AUD