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Radiant|Natural|GIA

1.20ct J SI1 Radiant Natural Diamond

EX • J/SI1 • GIA 1242026926

Certificate GIA 1242026926

Diamond specifications and retailer prices

From $3,301 NZD
As of November 6, 2026
Save $4,535 NZD (58%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $9,324 NZD at NZ Jewellers · As of September 30, 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 1242026926. Listed at 19 retailers as of November 4, 2026, with a 137% 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

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

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1242026926
Dimensions7.08 × 5.23 × 3.53 mm
L/W Ratio1.35
Girdle conditionPolished
Top View
7.08 mm5.23 mm1.20 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1242026926
Side View
Table 68.0%CrownGirdle: ThickPavilionCulet: NoneDepth 67.5%

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 6
Current: $4,236 NZD|Low: $3,233 NZD|High: $7,971 NZD|Avg: $4,727 NZD|+0.7%
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 3$3,301 NZD
Retailer 7$3,362 NZD
Retailer 12$3,617 NZD
Retailer 6$3,749 NZD
Retailer 11$3,869 NZD
Retailer 14$4,077 NZD
Retailer 15$4,113 NZD
Retailer 5$4,162 NZD
Retailer 1$4,236 NZD
Retailer 2$4,607 NZD
Retailer 9$5,473 NZD
Retailer 8$5,569 NZD
Retailer 4$6,241 NZD
Retailer 13$6,664 NZD
Retailer 10$7,836 NZD

31 data points across 15 retailers

19 retailers$3,301 NZD to $7,836 NZD

A
Cheapest Retailer
-
$3,301 NZD
A
Retailer 2
-
$3,362 NZD
View
A
Retailer 3
-
$3,617 NZD
View
B+
Retailer 4
-
$3,749 NZD
View
Final sale: no returns
B+
Retailer 5
-
$3,869 NZD
View
B+
Retailer 6
-
$4,077 NZD
View
B+
Retailer 7
-
$4,113 NZD
View
B+
Retailer 8
-
$4,162 NZD
View
B+
Retailer 9
-
$4,236 NZD
View
B+
Retailer 10
-
$4,452 NZD
View
Retailer 11
-
$4,479 NZD
View
Price last confirmed 37 days ago
B+
Retailer 12
-
$4,607 NZD
View
B
Retailer 13
-
$5,473 NZD
View
Retailer 14
-
$5,506 NZD
View
Price last confirmed 36 days ago
B
Retailer 15
-
$5,569 NZD
View
B
Retailer 16
-
$6,241 NZD
View
B
Retailer 17
-
$6,664 NZD
View
B
Retailer 18
-
$7,836 NZD
View
Most Expensive
NZ Jewellers
62ffbbde-18a4-4360-8d7e-35c1b4843a32 · Sep 30
$9,324 NZD
$5,169 USD
View
Price last confirmed 37 days ago
18 more retailers have this diamond
Prices start from $3,301 NZDSave up to $4,535 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
1.20ct Radiant
$3,301 NZD