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Round|Natural|GIA

2.51ct K SI2 Round Natural Diamond

EX • K/SI2 • GIA 5242069331

Certificate GIA 5242069331

Diamond specifications and retailer prices

From $15,608 AUD
As of November 3, 2026
Save $7,865 AUD (34%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $23,473 AUD at Diamonds Direct · As of November 1, 2026
View at Diamonds Direct

About this 2.51ct natural round diamond

This 2.51ct natural round sits in the two to three carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5242069331. Listed at 13 retailers as of November 1, 2026, with prices from $15,608 to $23,473, a $7,865 spread on the same certified stone. Diamonds Direct lists it at $23,473. 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
K
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 5242069331
Dimensions8.63 × 8.67 × 5.43 mm
L/W Ratio1.00
Culet sizeNone
Top View
8.63 mm8.67 mm2.51 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5242069331
Side View
Table 55.0%Crown 34.5°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 62.8%

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 3
Current: $23,473 AUD|Low: $15,608 AUD|High: $24,752 AUD|Avg: $19,311 AUD|-5.2%
Diamonds Direct
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 5, 2026
Retailer 6$15,608 AUD
Retailer 8$16,849 AUD
Retailer 7$17,019 AUD
Retailer 10$17,192 AUD
Retailer 11$17,283 AUD
Retailer 2$17,333 AUD
Retailer 13$17,603 AUD
Retailer 12$17,785 AUD
Retailer 3$20,168 AUD
Retailer 9$20,279 AUD
Retailer 4$20,300 AUD
Retailer 5$20,975 AUD
Diamonds Direct$23,473 AUD

30 data points across 13 retailers

13 retailers$15,608 AUD to $23,473 AUD

A
Cheapest Retailer
-
$15,608 AUD
A
Retailer 2
-
$16,849 AUD
View
A
Retailer 3
-
$17,019 AUD
View
A
Retailer 4
-
$17,192 AUD
View
A
Retailer 5
-
$17,283 AUD
View
A
Retailer 6
-
$17,333 AUD
View
A
Retailer 7
-
$17,603 AUD
View
A
Retailer 8
-
$17,785 AUD
View
B+
Retailer 9
-
$20,168 AUD
View
B+
Retailer 10
-
$20,279 AUD
View
B+
Retailer 11
-
$20,300 AUD
View
Retailer 12
-
$20,975 AUD
View
Price last confirmed 11 days ago
Most Expensive
B+
Diamonds Direct
1120578 · Nov 1
$23,473 AUD
$16,432 USD
View
12 more retailers have this diamond
Prices start from $15,608 AUDSave up to $7,865 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
$15,608 AUD