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Radiant|Natural|GIA

1.50ct I SI2 Radiant Natural Diamond

EX • I/SI2 • GIA 7551478920

Certificate GIA 7551478920

Diamond specifications and retailer prices

From $7,466 AUD
As of November 1, 2026
Save $6,453 AUD (46%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: $15,803 AUD at NZ Jewellers · As of September 20, 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 I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 7551478920. Listed at 23 retailers as of November 1, 2026, with a 86% 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
I
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 7551478920
Dimensions7.54 × 5.73 × 3.92 mm
L/W Ratio1.32
Culet sizeNone
Top View
7.54 mm5.73 mm1.50 ctI / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceFaint
CertificateGIA 7551478920
Side View
Table 64.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 68.5%

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: $8,997 AUD|Low: $7,081 AUD|High: $14,247 AUD|Avg: $9,820 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
November 6, 2026
Retailer 3$7,466 AUD
Retailer 2$7,967 AUD
Retailer 5$8,446 AUD
Retailer 12$8,465 AUD
Retailer 16$8,561 AUD
Retailer 15$8,664 AUD
Retailer 1$8,997 AUD
Retailer 9$9,063 AUD
Retailer 6$9,547 AUD
Retailer 8$9,547 AUD
Retailer 13$9,664 AUD
Retailer 4$9,868 AUD
Retailer 11$10,320 AUD
Retailer 7$10,419 AUD
Retailer 14$13,832 AUD
Retailer 10$13,919 AUD

32 data points across 16 retailers

23 retailers$7,466 AUD to $13,919 AUD

A
Cheapest Retailer
-
$7,466 AUD
B+
Retailer 2
-
$7,967 AUD
View
B+
Retailer 3
-
$8,446 AUD
View
B+
Retailer 4
-
$8,465 AUD
View
Retailer 5
-
$8,561 AUD
View
Price last confirmed 46 days ago
Retailer 6
-
$8,561 AUD
View
Price last confirmed 38 days ago
Retailer 7
-
$8,561 AUD
View
Price last confirmed 37 days ago
B+
Retailer 8
-
$8,664 AUD
View
B+
Retailer 9
-
$8,997 AUD
View
B+
Retailer 10
-
$9,063 AUD
View
B+
Retailer 11
-
$9,547 AUD
View
B+
Retailer 12
-
$9,547 AUD
View
B+
Retailer 13
-
$9,664 AUD
View
B
Retailer 14
-
$9,868 AUD
View
Retailer 15
-
$9,876 AUD
View
Price last confirmed 62 days ago
Retailer 16
-
$9,876 AUD
View
Price last confirmed 39 days ago
Retailer 17
-
$9,876 AUD
View
Price last confirmed 46 days ago
B
Retailer 18
-
$10,320 AUD
View
Retailer 19
-
$10,419 AUD
View
Price last confirmed 15 days ago
Retailer 20
-
$13,832 AUD
View
Price last confirmed 11 days ago
B
Retailer 21
-
$13,919 AUD
View
Retailer 22
-
$15,803 AUD
View
Price last confirmed 38 days ago
Most Expensive
NZ Jewellers
ce6e203c-c250-486e-8e7a-41ef796e6950 · Sep 20
$15,803 AUD
$10,858 USD
View
Price last confirmed 47 days ago
22 more retailers have this diamond
Prices start from $7,466 AUDSave up to $6,453 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
$7,466 AUD