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Round|Natural|GIA

2.51ct K SI2 Round Natural Diamond

EX • K/SI2 • GIA 2241088670

Certificate GIA 2241088670

Diamond specifications and retailer prices

From $15,656 AUD
As of November 5, 2026
Save $7,422 AUD (32%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $23,079 AUD at Diamonds Direct · As of November 5, 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 2241088670. Listed at 13 retailers as of November 5, 2026, with prices from $15,656 to $23,079, a $7,422 spread on the same certified stone. Diamonds Direct lists it at $23,079. 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
FluorescenceFaint
Crown angle33°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2241088670
Dimensions8.77 × 8.81 × 5.33 mm
L/W Ratio1.00
Culet sizeNone
Top View
8.77 mm8.81 mm2.51 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2241088670
Side View
Table 57.0%Crown 33°Girdle: MED-STKPavilion 41°Culet: NoneDepth 60.6%

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 5
Current: $23,079 AUD|Low: $15,656 AUD|High: $23,079 AUD|Avg: $18,472 AUD
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 6, 2026
Retailer 5$15,656 AUD
Retailer 2$16,806 AUD
Retailer 12$16,896 AUD
Retailer 8$16,913 AUD
Retailer 9$16,993 AUD
Retailer 11$17,309 AUD
Retailer 3$17,513 AUD
Retailer 7$18,323 AUD
Retailer 6$19,832 AUD
Retailer 4$19,839 AUD
Retailer 10$19,983 AUD
Retailer 13$20,629 AUD
Diamonds Direct$23,079 AUD

29 data points across 13 retailers

13 retailers$15,656 AUD to $23,079 AUD

A
Cheapest Retailer
-
$15,656 AUD
A
Retailer 2
-
$16,806 AUD
View
A
Retailer 3
-
$16,896 AUD
View
A
Retailer 4
-
$16,913 AUD
View
A
Retailer 5
-
$16,993 AUD
View
A
Retailer 6
-
$17,309 AUD
View
A
Retailer 7
-
$17,513 AUD
View
A
Retailer 8
-
$18,323 AUD
View
B+
Retailer 9
-
$19,832 AUD
View
B+
Retailer 10
-
$19,839 AUD
View
B+
Retailer 11
-
$19,983 AUD
View
B+
Retailer 12
-
$20,629 AUD
View
Most Expensive
B+
Diamonds Direct
1133708 · Nov 5
$23,079 AUD
$16,156 USD
View
12 more retailers have this diamond
Prices start from $15,656 AUDSave up to $7,422 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
$15,656 AUD