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Radiant|Natural|GIA

1.51ct K SI2 Radiant Natural Diamond

EX • K/SI2 • GIA 2547413242

Certificate GIA 2547413242

Diamond specifications and retailer prices

From $3,110 AUD
As of November 6, 2026
Save $4,024 AUD (56%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $8,536 AUD at NZ Jewellers · As of October 18, 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 2547413242. Listed at 15 retailers as of November 4, 2026, with a 129% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 2547413242
Dimensions7.49 × 5.78 × 3.96 mm
L/W Ratio1.30
Top View
7.49 mm5.78 mm1.51 ctK / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceMedium
CertificateGIA 2547413242
Side View
Table 67.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 68.5%

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 6
Current: $4,321 AUD|Low: $3,074 AUD|High: $7,292 AUD|Avg: $4,375 AUD|+0.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 7, 2026
Retailer 7$3,110 AUD
Retailer 2$3,305 AUD
Retailer 5$3,646 AUD
Retailer 3$4,317 AUD
Retailer 1$4,321 AUD
Retailer 8$4,439 AUD
Retailer 4$4,750 AUD
Retailer 6$7,134 AUD

41 data points across 8 retailers

15 retailers$3,110 AUD to $7,134 AUD

A
Cheapest Retailer
-
$3,110 AUD
A
Retailer 2
-
$3,305 AUD
View
A
Retailer 3
-
$3,646 AUD
View
B+
Retailer 4
-
$3,871 AUD
View
Retailer 5
-
$4,082 AUD
View
Price last confirmed 22 days ago
Retailer 6
-
$4,082 AUD
View
Price last confirmed 20 days ago
B+
Retailer 7
-
$4,122 AUD
View
Retailer 8
-
$4,240 AUD
View
Price last confirmed 22 days ago
B+
Retailer 9
-
$4,317 AUD
View
B+
Retailer 10
-
$4,321 AUD
View
B+
Retailer 11
-
$4,439 AUD
View
Retailer 12
-
$4,711 AUD
View
Price last confirmed 19 days ago
A
Retailer 13
-
$4,750 AUD
View
B
Retailer 14
-
$7,134 AUD
View
Most Expensive
NZ Jewellers
d2ac8816-3f34-491a-b66a-599bd9eac8b2 · Oct 18
$8,536 AUD
$5,865 USD
View
Price last confirmed 20 days ago
14 more retailers have this diamond
Prices start from $3,110 AUDSave up to $4,024 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
$3,110 AUD