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Radiant|Natural|GIA

1.51ct K SI1 Radiant Natural Diamond

GD • K/SI1 • GIA 5416106145

Certificate GIA 5416106145

Diamond specifications and retailer prices

From $8,504 AUD
As of November 6, 2026
Save $10,630 AUD (56%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $19,134 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 SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 5416106145. Listed at 18 retailers as of November 5, 2026, with prices from $8,504 to $19,134, a $10,630 spread on the same certified stone. NZ Jewellers lists it at $19,134. 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
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5416106145
Dimensions7.37 × 5.79 × 3.95 mm
L/W Ratio1.27
Top View
7.37 mm5.79 mm1.51 ctK / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5416106145
Side View
Table 64.0%CrownGirdle: THN-THKPavilionCulet: NoneDepth 68.2%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $19,134 AUD|Low: $8,504 AUD|High: $19,134 AUD|Avg: $11,967 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 7, 2026
Retailer 10$8,504 AUD
Retailer 8$8,631 AUD
Retailer 3$9,566 AUD
Retailer 11$10,364 AUD
Retailer 9$10,524 AUD
Retailer 2$10,680 AUD
Retailer 4$11,092 AUD
Retailer 5$11,781 AUD
Retailer 6$13,957 AUD
Retailer 7$15,900 AUD
NZ Jewellers$19,134 AUD

45 data points across 11 retailers

18 retailers$8,504 AUD to $19,134 AUD

B
Cheapest Retailer
-
$8,504 AUD
Retailer 2
-
$8,631 AUD
View
Price last confirmed 10 days ago
B
Retailer 3
-
$8,860 AUD
View
B
Retailer 4
-
$9,038 AUD
View
B
Retailer 5
-
$9,163 AUD
View
Retailer 6
-
$9,566 AUD
View
Price last confirmed 9 days ago
B
Retailer 7
-
$9,591 AUD
View
B
Retailer 8
-
$9,646 AUD
View
B
Retailer 9
-
$10,364 AUD
View
B
Retailer 10
-
$10,524 AUD
View
B
Retailer 11
-
$10,680 AUD
View
C
Retailer 12
-
$10,936 AUD
View
C
Retailer 13
-
$11,092 AUD
View
B
Retailer 14
-
$11,781 AUD
View
C
Retailer 15
-
$11,959 AUD
View
C
Retailer 16
-
$13,957 AUD
View
C
Retailer 17
-
$15,900 AUD
View
Most Expensive
C
NZ Jewellers
3ad37f3d-6cfa-4792-824f-277fad820cb8 · Nov 5
$19,134 AUD
$13,147 USD
View
17 more retailers have this diamond
Prices start from $8,504 AUDSave up to $10,630 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
$8,504 AUD