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Radiant|Natural|GIA

1.51ct K SI2 Radiant Natural Diamond

ID • K/SI2 • GIA 6243086864

Certificate GIA 6243086864

Diamond specifications and retailer prices

From $2,869 AUD
As of November 5, 2026
Save $5,269 AUD (65%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $8,137 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 top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6243086864. Listed at 10 retailers as of November 5, 2026, with prices from $2,869 to $8,137, a $5,269 spread on the same certified stone. NZ Jewellers lists it at $8,137. 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
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishVery Good
SymmetryExcellent
FluorescenceFaint
Pavilion angle58.69°
OriginNatural
Grading LabGIA
CertificateGIA 6243086864
Dimensions7.87 × 5.63 × 3.92 mm
L/W Ratio1.40
Key to symbols
Crystal, Feather, Needle
Top View
7.87 mm5.63 mm1.51 ctK / SI2
OriginNatural
CutIdeal
PolishVery Good
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6243086864
Side View
Table 64.0%CrownGirdle: THN-MEDPavilion 58.69°Culet: NoneDepth 69.7%

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: $8,137 AUD|Low: $2,869 AUD|High: $8,655 AUD|Avg: $4,980 AUD|-6.0%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 7, 2026
Retailer 5$2,869 AUD
Retailer 3$3,877 AUD
Retailer 6$3,892 AUD
Retailer 4$3,988 AUD
Retailer 2$4,042 AUD
Retailer 7$4,244 AUD
Retailer 9$4,676 AUD
Retailer 10$6,005 AUD
Retailer 8$6,909 AUD
NZ Jewellers$8,137 AUD

26 data points across 10 retailers

10 retailers$2,869 AUD to $8,137 AUD

A
Cheapest Retailer
-
$2,869 AUD
A
Retailer 2
-
$3,877 AUD
View
A
Retailer 3
-
$3,892 AUD
View
A
Retailer 4
-
$3,988 AUD
View
A
Retailer 5
-
$4,042 AUD
View
A
Retailer 6
-
$4,244 AUD
View
A
Retailer 7
-
$4,676 AUD
View
B+
Retailer 8
-
$6,005 AUD
View
B+
Retailer 9
-
$6,909 AUD
View
Most Expensive
B
NZ Jewellers
c933f9ce-d291-4579-89d0-8e423e614e02 · Nov 5
$8,137 AUD
$5,591 USD
View
9 more retailers have this diamond
Prices start from $2,869 AUDSave up to $5,269 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
$2,869 AUD