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Radiant|Natural|GIA

1.50ct K SI1 Radiant Natural Diamond

EX • K/SI1 • GIA 6542466536

Certificate GIA 6542466536

Diamond specifications and retailer prices

From $3,148 AUD
As of November 6, 2026
Save $4,103 AUD (57%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $8,740 AUD at NZ Jewellers · As of September 30, 2026
View at NZ Jewellers

About this 1.5ct natural radiant diamond

This 1.5ct 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 top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6542466536. Listed at 18 retailers as of November 4, 2026, with a 130% 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

1.50
Carat
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6542466536
Dimensions7.68 × 5.72 × 3.86 mm
L/W Ratio1.34
Top View
7.68 mm5.72 mm1.50 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6542466536
Side View
Table 68.0%CrownGirdle: THN-THKPavilionCulet: NoneDepth 67.6%

Caratlytics Score

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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: $3,937 AUD|Low: $3,148 AUD|High: $7,347 AUD|Avg: $4,599 AUD|-3.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 7, 2026
Retailer 2$3,148 AUD
Retailer 4$3,362 AUD
Retailer 9$3,707 AUD
Retailer 1$3,937 AUD
Retailer 5$4,026 AUD
Retailer 6$4,387 AUD
Retailer 3$4,392 AUD
Retailer 7$4,830 AUD
Retailer 8$5,065 AUD
Retailer 10$7,251 AUD

25 data points across 10 retailers

18 retailers$3,148 AUD to $7,251 AUD

A
Cheapest Retailer
-
$3,148 AUD
A
Retailer 2
-
$3,362 AUD
View
A
Retailer 3
-
$3,707 AUD
View
A
Retailer 4
-
$3,937 AUD
View
A
Retailer 5
-
$3,937 AUD
View
A
Retailer 6
-
$4,026 AUD
View
Retailer 7
-
$4,180 AUD
View
Price last confirmed 30 days ago
Retailer 8
-
$4,180 AUD
View
Price last confirmed 30 days ago
A
Retailer 9
-
$4,189 AUD
View
Retailer 10
-
$4,341 AUD
View
Price last confirmed 38 days ago
A
Retailer 11
-
$4,355 AUD
View
A
Retailer 12
-
$4,387 AUD
View
A
Retailer 13
-
$4,392 AUD
View
Retailer 14
-
$4,823 AUD
View
Price last confirmed 29 days ago
A
Retailer 15
-
$4,830 AUD
View
A
Retailer 16
-
$5,065 AUD
View
B
Retailer 17
-
$7,251 AUD
View
Most Expensive
NZ Jewellers
26738c81-d90b-4ff3-af35-ecd2c1c77dc9 · Sep 30
$8,740 AUD
$6,005 USD
View
Price last confirmed 37 days ago
17 more retailers have this diamond
Prices start from $3,148 AUDSave up to $4,103 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
1.50ct Radiant
$3,148 AUD