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Round|Natural|GIA

1.51ct K SI2 Round Natural Diamond

EX • K/SI2 • GIA 6561440326

Certificate GIA 6561440326

Diamond specifications and retailer prices

From $2,938 AUD
As of November 5, 2026
Save $2,785 AUD (49%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $5,724 AUD at Wholesale Diamonds Direct · As of November 4, 2026
View at Wholesale Diamonds Direct

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6561440326. Listed at 9 retailers as of November 4, 2026, with prices from $2,938 to $5,724, a $2,785 spread on the same certified stone. Wholesale Diamonds Direct lists it at $5,724. 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

1.51
Carat
K
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle34°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 6561440326
Dimensions7.33 × 4.55 × 4.55 mm
L/W Ratio1.61
Culet sizeNone
Top View
7.33 mm4.55 mm1.51 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6561440326
Side View
Table 57.0%Crown 34°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 61.9%

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 5
Current: $2,938 AUD|Low: $2,923 AUD|High: $6,478 AUD|Avg: $4,343 AUD|-2.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Wholesale Diamonds Direct
November 5, 2026
Retailer 1$2,938 AUD
Retailer 7$3,493 AUD
Retailer 4$3,653 AUD
Retailer 6$3,653 AUD
Retailer 3$3,704 AUD
Retailer 2$4,188 AUD
Retailer 5$4,344 AUD
Retailer 8$4,568 AUD
Wholesale Diamonds Direct$5,724 AUD

18 data points across 9 retailers

9 retailers$2,938 AUD to $5,724 AUD

A
Cheapest Retailer
-
$2,938 AUD
A
Retailer 2
-
$3,493 AUD
View
A
Retailer 3
-
$3,653 AUD
View
A
Retailer 4
-
$3,653 AUD
View
A
Retailer 5
-
$3,704 AUD
View
A
Retailer 6
-
$4,188 AUD
View
A
Retailer 7
-
$4,344 AUD
View
Retailer 8
-
$4,568 AUD
View
Price last confirmed 11 days ago
Most Expensive
B+
Wholesale Diamonds Direct
570704302 · Nov 4
$5,724 AUD
$4,007 USD
View
8 more retailers have this diamond
Prices start from $2,938 AUDSave up to $2,785 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
1.51ct Round
$2,938 AUD