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Marquise|Natural|GIA

2.50ct L SI2 Marquise Natural Diamond

EX • L/SI2 • GIA 5556721257

Certificate GIA 5556721257

Diamond specifications and retailer prices

From $11,354 AUD
As of November 6, 2026
Save $4,715 AUD (29%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $21,376 AUD at NZ Jewellers · As of October 17, 2026
View at NZ Jewellers

About this 2.5ct natural marquise diamond

This 2.5ct natural marquise sits in the two to three carat band, graded L colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5556721257. Listed at 10 retailers as of November 6, 2026, with a 42% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

2.50
Carat
L
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 5556721257
Dimensions13.63 × 7.14 × 4.30 mm
L/W Ratio1.91
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Twinning Wisp, Crystal, Feather, Knot
Top View
13.63 mm7.14 mm2.50 ctL / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 5556721257
Side View
Table 59.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 60.2%

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: $21,376 AUD|Low: $11,354 AUD|High: $21,376 AUD|Avg: $15,453 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 7$11,354 AUD
Retailer 2$11,474 AUD
Retailer 6$13,891 AUD
Retailer 10$14,156 AUD
Retailer 4$15,284 AUD
Retailer 11$15,336 AUD
Retailer 8$15,572 AUD
Retailer 5$16,069 AUD
Retailer 9$17,696 AUD
Retailer 3$18,156 AUD
NZ Jewellers$21,376 AUD

23 data points across 11 retailers

10 retailers$11,354 AUD to $16,069 AUD

B+
Cheapest Retailer
-
$11,354 AUD
A
Retailer 2
-
$11,474 AUD
View
B+
Retailer 3
-
$13,891 AUD
View
Retailer 4
-
$14,156 AUD
View
Price last confirmed 21 days ago
B+
Retailer 5
-
$15,284 AUD
View
Retailer 6
-
$15,336 AUD
View
Price last confirmed 19 days ago
Retailer 7
-
$15,572 AUD
View
Price last confirmed 21 days ago
B+
Retailer 8
-
$16,069 AUD
View
Retailer 9
-
$17,696 AUD
View
Price last confirmed 18 days ago
Most Expensive
NZ Jewellers
1d6e76a8-2eaf-4f36-8e29-4a12e2698fb3 · Oct 17
$21,376 AUD
$14,964 USD
View
Price last confirmed 19 days ago
9 more retailers have this diamond
Prices start from $11,354 AUDSave up to $4,715 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
2.50ct Marquise
$11,354 AUD