Radiant|Natural|GIA

1.20ct J SI1 Radiant Natural Diamond

EX • J/SI1 • GIA 1242026926

Certificate GIA 1242026926

Diamond specifications and retailer prices

From $1,830 USD
As of November 6, 2026
Save $2,514 USD (58%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $5,169 USD 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
Color
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: $2,348 USD|Low: $1,792 USD|High: $4,419 USD|Avg: $2,621 USD|+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$1,830 USD
Retailer 7$1,864 USD
Retailer 12$2,005 USD
Retailer 6$2,078 USD
Retailer 11$2,145 USD
Retailer 14$2,260 USD
Retailer 15$2,280 USD
Retailer 5$2,307 USD
Retailer 1$2,348 USD
Retailer 2$2,554 USD
Retailer 9$3,034 USD
Retailer 8$3,087 USD
Retailer 4$3,460 USD
Retailer 13$3,694 USD
Retailer 10$4,344 USD

31 data points across 15 retailers

19 retailers$1,830 USD to $4,344 USD

A
Cheapest Retailer
-
$1,830 USD
A
Retailer 2
-
$1,864 USD
View
A
Retailer 3
-
$2,005 USD
View
B+
Retailer 4
-
$2,078 USD
View
Final sale: no returns
B+
Retailer 5
-
$2,145 USD
View
B+
Retailer 6
-
$2,260 USD
View
B+
Retailer 7
-
$2,280 USD
View
B+
Retailer 8
-
$2,307 USD
View
B+
Retailer 9
-
$2,348 USD
View
B+
Retailer 10
-
$2,468 USD
View
Retailer 11
-
$2,483 USD
View
Price last confirmed 37 days ago
B+
Retailer 12
-
$2,554 USD
View
B
Retailer 13
-
$3,034 USD
View
Retailer 14
-
$3,052 USD
View
Price last confirmed 36 days ago
B
Retailer 15
-
$3,087 USD
View
B
Retailer 16
-
$3,460 USD
View
B
Retailer 17
-
$3,694 USD
View
B
Retailer 18
-
$4,344 USD
View
Most Expensive
NZ Jewellers
62ffbbde-18a4-4360-8d7e-35c1b4843a32 · Sep 30
$5,169 USD
View
Price last confirmed 37 days ago
18 more retailers have this diamond
Prices start from $1,830 USDSave up to $2,514 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
1.20ct Radiant
$1,830 USD