Radiant|Natural|GIA

1.50ct I SI2 Radiant Natural Diamond

EX • I/SI2 • GIA 6455478582

Certificate GIA 6455478582

Diamond specifications and retailer prices

From $5,095 USD
As of November 4, 2026
Save $1,305 USD (20%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $10,786 USD at NZ Jewellers · As of September 27, 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 6455478582. Listed at 17 retailers as of November 4, 2026, with a 26% 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
Color
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6455478582
Dimensions7.31 × 5.77 × 3.63 mm
L/W Ratio1.27
Top View
7.31 mm5.77 mm1.50 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6455478582
Side View
Table 67.0%CrownGirdle: ThickPavilionCulet: NoneDepth 62.8%

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 4
Current: $5,661 USD|Low: $4,494 USD|High: $7,110 USD|Avg: $5,638 USD|-0.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 7, 2026
Retailer 11$5,095 USD
Retailer 4$5,100 USD
Retailer 6$5,242 USD
Retailer 5$5,393 USD
Retailer 2$5,537 USD
Retailer 1$5,661 USD
Retailer 3$5,700 USD
Retailer 10$5,765 USD
Retailer 8$5,806 USD
Retailer 7$5,842 USD
Retailer 9$7,110 USD

39 data points across 11 retailers

17 retailers$5,095 USD to $6,400 USD

A
Cheapest Retailer
-
$5,095 USD
A
Retailer 2
-
$5,100 USD
View
A
Retailer 3
-
$5,242 USD
View
A
Retailer 4
-
$5,393 USD
View
Final sale: no returns
B+
Retailer 5
-
$5,537 USD
View
A
Retailer 6
-
$5,661 USD
View
B+
Retailer 7
-
$5,765 USD
View
B+
Retailer 8
-
$5,806 USD
View
Retailer 9
-
$5,842 USD
View
Price last confirmed 9 days ago
B+
Retailer 10
-
$5,842 USD
View
Retailer 11
-
$5,842 USD
View
Price last confirmed 40 days ago
B+
Retailer 12
-
$6,200 USD
View
B+
Retailer 13
-
$6,200 USD
View
B+
Retailer 14
-
$6,400 USD
View
Retailer 15
-
$6,741 USD
View
Price last confirmed 40 days ago
Retailer 16
-
$7,110 USD
View
Price last confirmed 15 days ago
Most Expensive
NZ Jewellers
e5ef375c-68b4-49ed-8aee-4848566a0321 · Sep 27
$10,786 USD
View
Price last confirmed 40 days ago
16 more retailers have this diamond
Prices start from $5,095 USDSave up to $1,305 USD

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
$5,095 USD