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Radiant|Natural|GIA

1.50ct H SI1 Radiant Natural Diamond

EX • H/SI1 • GIA 2557139819

Certificate GIA 2557139819

Diamond specifications and retailer prices

From $4,968 AUD
HK$27,200 HKD
As of November 2, 2026
Save $5,505 AUD (53%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $12,435 AUD at NZ Jewellers · As of September 29, 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 2557139819. Listed at 20 retailers as of November 1, 2026, with a 111% 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
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 2557139819
Dimensions7.30 × 5.60 × 3.92 mm
L/W Ratio1.30
Top View
7.30 mm5.60 mm1.50 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 2557139819
Side View
Table 67.0%CrownGirdle: ThickPavilionCulet: NoneDepth 69.9%

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 2
Current: $5,940 AUD|Low: $4,895 AUD|High: $11,005 AUD|Avg: $6,905 AUD|-18.1%
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 13$4,968 AUD
Retailer 19$5,242 AUD
Retailer 17$5,582 AUD
Retailer 10$5,603 AUD
Retailer 4$5,633 AUD
Retailer 6$5,743 AUD
Retailer 2$5,878 AUD
Retailer 8$5,932 AUD
Retailer 1$5,940 AUD
Retailer 15$5,969 AUD
Retailer 12$6,178 AUD
Retailer 18$6,265 AUD
Retailer 7$6,401 AUD
Retailer 11$7,188 AUD
Retailer 16$7,553 AUD
Retailer 5$8,205 AUD
Retailer 14$8,490 AUD
Retailer 9$10,437 AUD
Retailer 3$10,472 AUD

23 data points across 19 retailers

20 retailers$4,968 AUD to $10,472 AUD

A
Cheapest Retailer
-
$4,968 AUD
HK$27,200 HKD
A
Retailer 2
-
$5,242 AUD
$3,674 USD
View
A
Retailer 3
-
$5,582 AUD
$3,912 USD
View
Final sale: no returns
A
Retailer 4
-
$5,603 AUD
$3,927 USD
View
A
Retailer 5
-
$5,633 AUD
€3,760 EUR
View
A
Retailer 6
-
$5,743 AUD
$4,025 USD
View
A
Retailer 7
-
$5,878 AUD
View
A
Retailer 8
-
$5,932 AUD
$4,157 USD
View
A
Retailer 9
-
$5,940 AUD
$4,163 USD
View
A
Retailer 10
-
$5,969 AUD
$4,183 USD
View
A
Retailer 11
-
$6,178 AUD
$4,330 USD
View
A
Retailer 12
-
$6,265 AUD
£3,457 GBP
View
A
Retailer 13
-
$6,401 AUD
$4,486 USD
View
Retailer 14
-
$7,188 AUD
View
Price last confirmed 23 days ago
A
Retailer 15
-
$7,553 AUD
€5,041 EUR
View
B+
Retailer 16
-
$8,205 AUD
ZAR 92,900 ZAR
View
B+
Retailer 17
-
$8,490 AUD
$5,950 USD
View
Retailer 18
-
$10,437 AUD
$7,314 USD
View
Price last confirmed 9 days ago
B
Retailer 19
-
$10,472 AUD
£5,779 GBP
View
Most Expensive
NZ Jewellers
b734cccf-65a5-4d93-bb26-173a12bb62c9 · Sep 29
$12,435 AUD
$8,715 USD
View
Price last confirmed 33 days ago
19 more retailers have this diamond
Prices start from $4,968 AUDSave up to $5,505 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
$4,968 AUD