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Marquise|Natural|GIA

2.50ct G SI1 Marquise Natural Diamond

EX • G/SI1 • GIA 1555451099

Certificate GIA 1555451099

Diamond specifications and retailer prices

From $40,630 AUD
$28,375 USD
As of November 1, 2026
Save $32,076 AUD (44%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $72,706 AUD at MOH London · As of November 2, 2026
View at MOH London

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 top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1555451099. Listed at 16 retailers as of November 1, 2026, with prices from $40,630 to $72,706, a $32,076 spread on the same certified stone. MOH London lists it at $72,706. 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
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.7°
Pavilion angle39.8°
OriginNatural
Grading LabGIA
CertificateGIA 1555451099
Dimensions13.38 × 7.02 × 4.35 mm
L/W Ratio1.91
Culet sizeNone
Top View
13.38 mm7.02 mm2.50 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1555451099
Side View
Table 61.0%Crown 39.7°Girdle: MED-THKPavilion 39.8°Culet: NoneDepth 61.9%

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 1
Current: $72,706 AUD|Low: $40,444 AUD|High: $72,706 AUD|Avg: $48,828 AUD|+3.0%
MOH London
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 3, 2026
Retailer 8$40,941 AUD
Retailer 16$42,135 AUD
Retailer 4$42,384 AUD
Retailer 7$44,664 AUD
Retailer 6$45,036 AUD
Retailer 14$45,219 AUD
Retailer 9$46,887 AUD
Retailer 3$48,493 AUD
Retailer 10$48,881 AUD
Retailer 11$49,867 AUD
Retailer 5$50,353 AUD
Retailer 12$50,433 AUD
Retailer 15$52,373 AUD
Retailer 2$54,484 AUD
Retailer 13$64,373 AUD
MOH London$72,706 AUD

18 data points across 16 retailers

16 retailers$40,630 AUD to $72,706 AUD

B+
Cheapest Retailer
-
$40,630 AUD
$28,375 USD
B+
Retailer 2
-
$42,135 AUD
$29,426 USD
View
B+
Retailer 3
-
$42,384 AUD
$29,600 USD
View
Retailer 4
-
$44,664 AUD
$31,192 USD
View
Price last confirmed 18 days ago
Retailer 5
-
$45,036 AUD
$31,452 USD
View
Price last confirmed 14 days ago
B+
Retailer 6
-
$45,219 AUD
$31,580 USD
View
B+
Retailer 7
-
$46,887 AUD
£25,783 GBP
View
B+
Retailer 8
-
$48,493 AUD
$33,866 USD
View
B
Retailer 9
-
$48,881 AUD
$34,137 USD
View
B
Retailer 10
-
$49,867 AUD
£27,422 GBP
View
B
Retailer 11
-
$50,353 AUD
$35,165 USD
View
B
Retailer 12
-
$50,433 AUD
$35,221 USD
View
B+
Retailer 13
-
$52,373 AUD
$36,576 USD
View
B+
Retailer 14
-
$54,484 AUD
€36,238 EUR
View
B
Retailer 15
-
$64,373 AUD
ZAR 726,278 ZAR
View
Most Expensive
B
MOH London
DD5D6BCC9 · Nov 2
$72,706 AUD
£39,981 GBP
View
15 more retailers have this diamond
Prices start from $40,630 AUDSave up to $32,076 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
$40,630 AUD