CaratHunter
Plans
Radiant|Natural|GIA

1.51ct K SI2 Radiant Natural Diamond

VG • K/SI2 • GIA 6505379824

Certificate GIA 6505379824

Diamond specifications and retailer prices

From $6,321 AUD
As of November 6, 2026
Save $7,332 AUD (54%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $13,653 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 6505379824. Listed at 16 retailers as of November 5, 2026, with prices from $6,321 to $13,653, a $7,332 spread on the same certified stone. NZ Jewellers lists it at $13,653. 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 angle46°
Pavilion angle56.7°
OriginNatural
Grading LabGIA
CertificateGIA 6505379824
Dimensions8.21 × 5.73 × 3.89 mm
L/W Ratio1.43
Top View
8.21 mm5.73 mm1.51 ctK / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6505379824
Side View
Table 70.0%Crown 46°Girdle: ThickPavilion 56.7°Culet: NoneDepth 67.9%

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: $13,653 AUD|Low: $6,321 AUD|High: $13,653 AUD|Avg: $8,499 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
Retailer 14
Retailer 15
Retailer 16
November 7, 2026
Retailer 16$6,321 AUD
Retailer 3$6,450 AUD
Retailer 8$6,484 AUD
Retailer 14$6,529 AUD
Retailer 4$6,884 AUD
Retailer 5$7,396 AUD
Retailer 6$7,396 AUD
Retailer 7$7,396 AUD
Retailer 2$7,885 AUD
Retailer 10$7,926 AUD
Retailer 9$8,134 AUD
Retailer 15$8,533 AUD
Retailer 11$9,186 AUD
Retailer 13$11,822 AUD
Retailer 12$12,968 AUD
NZ Jewellers$13,653 AUD

36 data points across 16 retailers

16 retailers$6,321 AUD to $13,653 AUD

B+
Cheapest Retailer
-
$6,321 AUD
B+
Retailer 2
-
$6,450 AUD
View
Retailer 3
-
$6,484 AUD
View
Price last confirmed 10 days ago
B+
Retailer 4
-
$6,529 AUD
View
B
Retailer 5
-
$6,884 AUD
View
Retailer 6
-
$7,396 AUD
View
Price last confirmed 9 days ago
B
Retailer 7
-
$7,396 AUD
View
B
Retailer 8
-
$7,396 AUD
View
B
Retailer 9
-
$7,885 AUD
View
B
Retailer 10
-
$7,926 AUD
View
B
Retailer 11
-
$8,134 AUD
View
B
Retailer 12
-
$8,533 AUD
View
B
Retailer 13
-
$9,186 AUD
View
C
Retailer 14
-
$11,822 AUD
View
C
Retailer 15
-
$12,968 AUD
View
Most Expensive
C
NZ Jewellers
17d9eeda-530a-4a6b-a860-8d667072c6b2 · Nov 5
$13,653 AUD
$9,381 USD
View
15 more retailers have this diamond
Prices start from $6,321 AUDSave up to $7,332 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+
1.51ct Radiant
$6,321 AUD