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Radiant|Natural|GIA

1.50ct J SI1 Radiant Natural Diamond

EX • J/SI1 • GIA 1235223535

Certificate GIA 1235223535

Diamond specifications and retailer prices

From $6,435 NZD
As of November 6, 2026
Save $8,605 NZD (57%) vs most expensive(unlock to see where)
29 retailers carry this diamond
Most expensive: $15,039 NZD at NZ Jewellers · As of November 5, 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 J 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 1235223535. Listed at 29 retailers as of November 5, 2026, with prices from $6,435 to $15,039, a $8,605 spread on the same certified stone. NZ Jewellers lists it at $15,039. 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
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1235223535
Dimensions7.09 × 5.82 × 4.05 mm
L/W Ratio1.22
Culet sizeNone
Key to symbols
Feather, Cloud, Crystal, Needle
Top View
7.09 mm5.82 mm1.50 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1235223535
Side View
Table 67.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 69.6%

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 6
Current: $10,641 NZD|Low: $6,245 NZD|High: $13,912 NZD|Avg: $8,888 NZD
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
November 7, 2026
Retailer 5$6,720 NZD
Retailer 6$7,217 NZD
Retailer 8$7,820 NZD
Retailer 9$7,820 NZD
Retailer 14$7,948 NZD
Retailer 11$8,312 NZD
Retailer 17$8,440 NZD
Retailer 13$8,498 NZD
Retailer 7$8,700 NZD
Retailer 2$8,965 NZD
Retailer 3$8,965 NZD
Retailer 10$9,189 NZD
Retailer 4$9,272 NZD
Retailer 15$9,712 NZD
Retailer 16$10,531 NZD
Retailer 1$10,641 NZD
Retailer 12$13,674 NZD

43 data points across 17 retailers

29 retailers$6,435 NZD to $15,039 NZD

A
Cheapest Retailer
-
$6,435 NZD
A
Retailer 2
-
$6,720 NZD
View
B+
Retailer 3
-
$6,813 NZD
View
B+
Retailer 4
-
$6,882 NZD
View
B+
Retailer 5
-
$6,896 NZD
View
B+
Retailer 6
-
$7,142 NZD
View
B+
Retailer 7
-
$7,217 NZD
View
Final sale: no returns
B+
Retailer 8
-
$7,345 NZD
View
B+
Retailer 9
-
$7,423 NZD
View
Retailer 10
-
$7,820 NZD
View
Price last confirmed 9 days ago
B+
Retailer 11
-
$7,820 NZD
View
B+
Retailer 12
-
$7,820 NZD
View
B+
Retailer 13
-
$7,948 NZD
View
Retailer 14
-
$8,312 NZD
View
B+
Retailer 15
-
$8,440 NZD
View
B+
Retailer 16
-
$8,498 NZD
View
Retailer 17
-
$8,700 NZD
View
Price last confirmed 29 days ago
B
Retailer 18
-
$8,965 NZD
View
B
Retailer 19
-
$8,965 NZD
View
B
Retailer 20
-
$8,967 NZD
View
B
Retailer 21
-
$9,023 NZD
View
Retailer 22
-
$9,189 NZD
View
B
Retailer 23
-
$9,272 NZD
View
Retailer 24
-
$9,532 NZD
View
Price last confirmed 15 days ago
B+
Retailer 25
-
$9,712 NZD
View
B
Retailer 26
-
$10,531 NZD
View
Retailer 27
-
$10,641 NZD
View
B
Retailer 28
-
$13,674 NZD
View
Most Expensive
B
NZ Jewellers
5656a498-0476-440e-ad80-96e46112e2e9 · Nov 5
$15,039 NZD
$8,337 USD
View
28 more retailers have this diamond
Prices start from $6,435 NZDSave up to $8,605 NZD

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
$6,435 NZD