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Round|Natural|GIA

2.51ct M SI2 Round Natural Diamond

EX • M/SI2 • GIA 2245050886

Certificate GIA 2245050886

Diamond specifications and retailer prices

From $11,307 AUD
As of November 4, 2026
Save $10,574 AUD (48%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $21,880 AUD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 2.51ct natural round diamond

This 2.51ct natural round sits in the two to three carat band, graded M colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2245050886. Listed at 11 retailers as of November 4, 2026, with prices from $11,307 to $21,880, a $10,574 spread on the same certified stone. NZ Jewellers lists it at $21,880. 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

2.51
Carat
M
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 2245050886
Dimensions8.63 × 8.70 × 5.45 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Twinning Wisp, Feather, Cloud, Crystal, Needle, Natural
Top View
8.63 mm8.70 mm2.51 ctM / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2245050886
Side View
Table 56.0%Crown 33°Girdle: Sli. ThickPavilion 41.6°Culet: NoneDepth 62.9%

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 4
Current: $21,880 AUD|Low: $11,307 AUD|High: $23,737 AUD|Avg: $14,793 AUD|-7.8%
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$11,307 AUD
Retailer 3$11,415 AUD
Retailer 9$12,075 AUD
Retailer 5$12,714 AUD
Retailer 11$13,082 AUD
Retailer 10$13,284 AUD
Retailer 8$13,369 AUD
Retailer 4$14,202 AUD
Retailer 2$14,245 AUD
Retailer 6$15,095 AUD
NZ Jewellers$21,880 AUD

39 data points across 11 retailers

11 retailers$11,307 AUD to $21,880 AUD

A
Cheapest Retailer
-
$11,307 AUD
A
Retailer 2
-
$11,415 AUD
View
Retailer 3
-
$12,075 AUD
View
Price last confirmed 8 days ago
B+
Retailer 4
-
$12,714 AUD
View
B+
Retailer 5
-
$13,082 AUD
View
B+
Retailer 6
-
$13,284 AUD
View
B+
Retailer 7
-
$13,369 AUD
View
B+
Retailer 8
-
$14,202 AUD
View
B+
Retailer 9
-
$14,245 AUD
View
B+
Retailer 10
-
$15,095 AUD
View
Most Expensive
B
NZ Jewellers
212e4133-6e3b-4518-9414-07f823665f85 · Nov 5
$21,880 AUD
$15,317 USD
View
10 more retailers have this diamond
Prices start from $11,307 AUDSave up to $10,574 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
2.51ct Round
$11,307 AUD