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Radiant|Natural|GIA

1.20ct J SI1 Radiant Natural Diamond

EX • J/SI1 • GIA 1515243600

Certificate GIA 1515243600

Diamond specifications and retailer prices

From $4,003 NZD
As of November 5, 2026
Save $6,619 NZD (62%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $10,621 NZD at NZ Jewellers · As of November 3, 2026
View at NZ Jewellers

About this 1.2ct natural radiant diamond

This 1.2ct natural radiant sits in the classic one-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 1515243600. Listed at 22 retailers as of November 3, 2026, with prices from $4,003 to $10,621, a $6,619 spread on the same certified stone. NZ Jewellers lists it at $10,621. 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

1.20
Carat
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1515243600
Dimensions7.14 × 5.33 × 3.65 mm
L/W Ratio1.34
Girdle conditionPolished
Culet sizeNone
Key to symbols
Crystal, Needle, Natural
Top View
7.14 mm5.33 mm1.20 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1515243600
Side View
Table 68.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 68.3%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $4,591 NZD|Low: $4,003 NZD|High: $8,996 NZD|Avg: $5,495 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
November 7, 2026
Retailer 11$4,003 NZD
Retailer 12$4,052 NZD
Retailer 6$4,158 NZD
Retailer 4$4,212 NZD
Retailer 13$4,273 NZD
Retailer 1$4,591 NZD
Retailer 14$4,760 NZD
Retailer 15$5,024 NZD
Retailer 2$5,064 NZD
Retailer 10$5,175 NZD
Retailer 3$5,594 NZD
Retailer 7$5,691 NZD
Retailer 8$5,715 NZD
Retailer 9$5,969 NZD
Retailer 5$8,899 NZD

33 data points across 15 retailers

22 retailers$4,003 NZD to $10,621 NZD

B+
Cheapest Retailer
-
$4,003 NZD
B+
Retailer 2
-
$4,052 NZD
View
Final sale: no returns
B+
Retailer 3
-
$4,158 NZD
View
B+
Retailer 4
-
$4,212 NZD
View
B+
Retailer 5
-
$4,246 NZD
View
B+
Retailer 6
-
$4,273 NZD
View
B
Retailer 7
-
$4,591 NZD
View
Retailer 8
-
$4,604 NZD
View
Price last confirmed 9 days ago
B
Retailer 9
-
$4,604 NZD
View
B+
Retailer 10
-
$4,760 NZD
View
B+
Retailer 11
-
$4,910 NZD
View
B+
Retailer 12
-
$5,024 NZD
View
B+
Retailer 13
-
$5,064 NZD
View
B
Retailer 14
-
$5,143 NZD
View
B+
Retailer 15
-
$5,175 NZD
View
B
Retailer 16
-
$5,412 NZD
View
B
Retailer 17
-
$5,594 NZD
View
Retailer 18
-
$5,691 NZD
View
Price last confirmed 31 days ago
B
Retailer 19
-
$5,715 NZD
View
B
Retailer 20
-
$5,969 NZD
View
B
Retailer 21
-
$8,899 NZD
View
Most Expensive
B
NZ Jewellers
76458eb6-69a0-4a20-85c4-dab2693a0be1 · Nov 3
$10,621 NZD
$5,888 USD
View
21 more retailers have this diamond
Prices start from $4,003 NZDSave up to $6,619 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.

B+
1.20ct Radiant
$4,003 NZD