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Radiant|Natural|GIA

1.50ct H SI1 Radiant Natural Diamond

EX • H/SI1 • GIA 1545488189

Certificate GIA 1545488189

Diamond specifications and retailer prices

From $5,856 AUD
$4,104 USD
As of November 1, 2026
Save $6,309 AUD (52%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $13,369 AUD at NZ Jewellers · As of September 25, 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1545488189. Listed at 21 retailers as of November 1, 2026, with a 108% 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
H
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle34.1°
OriginNatural
Grading LabGIA
CertificateGIA 1545488189
Dimensions7.30 × 5.60 × 3.90 mm
L/W Ratio1.30
Girdle conditionPolished
Top View
7.30 mm5.60 mm1.50 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1545488189
Side View
Table 70.0%CrownGirdle: ThickPavilion 34.1°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 1
Current: $6,992 AUD|Low: $5,772 AUD|High: $12,473 AUD|Avg: $7,878 AUD
Retailer 1
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
Retailer 17
Retailer 18
Retailer 19
November 2, 2026
Retailer 7$5,856 AUD
Retailer 13$5,863 AUD
Retailer 19$6,181 AUD
Retailer 17$6,471 AUD
Retailer 9$6,530 AUD
Retailer 4$6,557 AUD
Retailer 10$6,564 AUD
Retailer 2$6,849 AUD
Retailer 6$6,885 AUD
Retailer 15$6,984 AUD
Retailer 1$6,992 AUD
Retailer 12$7,420 AUD
Retailer 18$7,550 AUD
Retailer 11$7,903 AUD
Retailer 16$8,756 AUD
Retailer 14$9,403 AUD
Retailer 5$9,450 AUD
Retailer 8$12,116 AUD
Retailer 3$12,165 AUD

24 data points across 19 retailers

21 retailers$5,856 AUD to $12,165 AUD

A
Cheapest Retailer
-
$5,856 AUD
$4,104 USD
A
Retailer 2
-
$5,863 AUD
HK$32,100 HKD
View
A
Retailer 3
-
$6,181 AUD
$4,332 USD
View
A
Retailer 4
-
$6,471 AUD
$4,535 USD
View
Final sale: no returns
A
Retailer 5
-
$6,530 AUD
$4,576 USD
View
A
Retailer 6
-
$6,557 AUD
€4,377 EUR
View
A
Retailer 7
-
$6,564 AUD
$4,600 USD
View
A
Retailer 8
-
$6,849 AUD
View
A
Retailer 9
-
$6,885 AUD
$4,825 USD
View
A
Retailer 10
-
$6,984 AUD
$4,895 USD
View
A
Retailer 11
-
$6,992 AUD
$4,900 USD
View
A
Retailer 12
-
$7,420 AUD
$5,200 USD
View
A
Retailer 13
-
$7,550 AUD
£4,166 GBP
View
Retailer 14
-
$7,903 AUD
View
Price last confirmed 23 days ago
B+
Retailer 15
-
$7,937 AUD
View
B+
Retailer 16
-
$8,756 AUD
€5,844 EUR
View
B+
Retailer 17
-
$9,403 AUD
$6,590 USD
View
B+
Retailer 18
-
$9,450 AUD
ZAR 106,994 ZAR
View
Retailer 19
-
$12,116 AUD
$8,491 USD
View
Price last confirmed 9 days ago
B
Retailer 20
-
$12,165 AUD
£6,713 GBP
View
Most Expensive
NZ Jewellers
c6a6288c-2c3d-4345-81ca-3b631b6af0d9 · Sep 25
$13,369 AUD
$9,369 USD
View
Price last confirmed 38 days ago
20 more retailers have this diamond
Prices start from $5,856 AUDSave up to $6,309 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
$5,856 AUD