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Radiant|Natural|GIA

1.51ct K SI2 Radiant Natural Diamond

VG • K/SI2 • GIA 6485980459

Certificate GIA 6485980459

Diamond specifications and retailer prices

From $3,614 AUD
As of November 4, 2026
Save $4,595 AUD (56%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: $8,208 AUD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.51ct natural radiant diamond

This 1.51ct natural radiant sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 6485980459. Listed at 23 retailers as of November 4, 2026, with prices from $3,614 to $8,208, a $4,595 spread on the same certified stone. NZ Jewellers lists it at $8,208. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
K
Colour
SI2
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle47.9°
Pavilion angle55.6°
OriginNatural
Grading LabGIA
CertificateGIA 6485980459
Dimensions7.72 × 5.65 × 3.93 mm
L/W Ratio1.37
Top View
7.72 mm5.65 mm1.51 ctK / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6485980459
Side View
Table 67.0%Crown 47.9°Girdle: Very ThickPavilion 55.6°Culet: NoneDepth 69.5%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $8,208 AUD|Low: $3,090 AUD|High: $8,208 AUD|Avg: $4,932 AUD
NZ Jewellers
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 7, 2026
Retailer 4$3,631 AUD
Retailer 10$3,707 AUD
Retailer 9$4,269 AUD
Retailer 13$4,269 AUD
Retailer 3$4,433 AUD
Retailer 5$4,609 AUD
Retailer 11$4,635 AUD
Retailer 6$4,695 AUD
Retailer 2$4,876 AUD
Retailer 12$4,925 AUD
Retailer 7$5,171 AUD
Retailer 8$7,859 AUD
NZ Jewellers$8,208 AUD

44 data points across 13 retailers

23 retailers$3,614 AUD to $8,208 AUD

A
Cheapest Retailer
-
$3,614 AUD
Retailer 2
-
$3,631 AUD
View
Price last confirmed 10 days ago
A
Retailer 3
-
$3,707 AUD
View
A
Retailer 4
-
$3,775 AUD
View
A
Retailer 5
-
$3,775 AUD
View
B+
Retailer 6
-
$3,823 AUD
View
B+
Retailer 7
-
$4,225 AUD
View
B+
Retailer 8
-
$4,269 AUD
View
Retailer 9
-
$4,269 AUD
View
Price last confirmed 9 days ago
B+
Retailer 10
-
$4,308 AUD
View
Retailer 11
-
$4,340 AUD
View
Price last confirmed 15 days ago
B+
Retailer 12
-
$4,433 AUD
View
B+
Retailer 13
-
$4,609 AUD
View
B+
Retailer 14
-
$4,635 AUD
View
A
Retailer 15
-
$4,695 AUD
View
B+
Retailer 16
-
$4,713 AUD
View
B+
Retailer 17
-
$4,727 AUD
View
B+
Retailer 18
-
$4,876 AUD
View
B+
Retailer 19
-
$4,925 AUD
View
B+
Retailer 20
-
$5,171 AUD
View
B
Retailer 21
-
$6,797 AUD
View
B
Retailer 22
-
$7,859 AUD
View
Most Expensive
B
NZ Jewellers
292d320e-dd0d-4df5-86f7-f7fe54074af6 · Nov 5
$8,208 AUD
$5,640 USD
View
22 more retailers have this diamond
Prices start from $3,614 AUDSave up to $4,595 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 Radiant
$3,614 AUD