Radiant|Natural|GIA

1.20ct J SI2 Radiant Natural Diamond

EX • J/SI2 • GIA 2458689031

Certificate GIA 2458689031

Diamond specifications and retailer prices

From $1,157 USD
As of October 30, 2026
Save $1,151 USD (50%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $3,057 USD at NZ Jewellers · As of September 20, 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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2458689031. Listed at 7 retailers as of October 29, 2026, with a 99% 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
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 2458689031
Dimensions6.56 × 5.24 × 3.61 mm
L/W Ratio1.25
Top View
6.56 mm5.24 mm1.20 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceStrong
CertificateGIA 2458689031
Side View
Table 66.0%CrownGirdlePavilionCulet: NoneDepth 68.9%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $1,431 USD|Low: $922 USD|High: $2,323 USD|Avg: $1,434 USD|+5.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 31, 2026
Retailer 9$922 USD
Retailer 4$1,157 USD
Retailer 7$1,203 USD
Retailer 5$1,253 USD
Retailer 1$1,431 USD
Retailer 8$1,491 USD
Retailer 6$1,545 USD
Retailer 2$1,750 USD
Retailer 3$2,308 USD

31 data points across 9 retailers

7 retailers$1,157 USD to $2,308 USD

A
Cheapest Retailer
-
$1,157 USD
Final sale: no returns
Retailer 2
-
$1,253 USD
View
Price last confirmed 38 days ago
B+
Retailer 3
-
$1,431 USD
£1,127 GBP
View
Retailer 4
-
$1,446 USD
View
Price last confirmed 37 days ago
B+
Retailer 5
-
$1,750 USD
€1,667 EUR
View
B+
Retailer 6
-
$2,308 USD
£1,817 GBP
View
Most Expensive
NZ Jewellers
9d061dce-021d-488f-8260-ce79ce014297 · Sep 20
$3,057 USD
View
Price last confirmed 40 days ago
6 more retailers have this diamond
Prices start from $1,157 USDSave up to $1,151 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
$1,157 USD