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Round|Natural|GIA

4.51ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 7448789910

Certificate GIA 7448789910

Diamond specifications and retailer prices

From $59,320 AUD
As of November 6, 2026
Save $13,611 AUD (19%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $72,931 AUD at 77 Diamonds · As of November 6, 2026
View at 77 Diamonds

About this 4.51ct natural round diamond

This 4.51ct natural round sits in the three to five carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 7448789910. Listed at 5 retailers as of November 6, 2026, with prices from $59,320 to $72,931, a $13,611 spread on the same certified stone. 77 Diamonds lists it at $72,931. 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

4.51
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 7448789910
Dimensions10.59 × 10.52 × 6.48 mm
L/W Ratio1.01
Top View
10.59 mm10.52 mm4.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7448789910
Side View
Table 61.0%Crown 33°Girdle: Slightly ThickPavilion 41.6°Culet: NoneDepth 61.6%

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 6
Current: $72,931 AUD|Low: $59,320 AUD|High: $79,946 AUD|Avg: $65,157 AUD|-6.8%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 6, 2026
Retailer 3$59,320 AUD
Retailer 2$59,673 AUD
Retailer 4$60,497 AUD
Retailer 5$62,684 AUD
77 Diamonds$72,931 AUD

33 data points across 5 retailers

5 retailers$59,320 AUD to $72,931 AUD

B+
Cheapest Retailer
-
$59,320 AUD
Retailer 2
-
$59,673 AUD
View
Price last confirmed 9 days ago
B+
Retailer 3
-
$60,497 AUD
View
B+
Retailer 4
-
$62,684 AUD
View
Most Expensive
B
77 Diamonds
RBZCNEAG6VM · Nov 6
$72,931 AUD
£40,200 GBP
View
4 more retailers have this diamond
Prices start from $59,320 AUDSave up to $13,611 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+
4.51ct Round
$59,320 AUD