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Radiant|Natural|GIA

1.21ct J SI1 Radiant Natural Diamond

VG • J/SI1 • GIA 2245114745

Certificate GIA 2245114745

Diamond specifications and retailer prices

From $2,842 AUD
As of November 4, 2026
Save $2,298 AUD (45%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $5,140 AUD at Helzberg Diamonds · As of November 6, 2026
View at Helzberg Diamonds

About this 1.21ct natural radiant diamond

This 1.21ct natural radiant sits in the classic one-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 2245114745. Listed at 11 retailers as of November 4, 2026, with prices from $2,842 to $5,140, a $2,298 spread on the same certified stone. Helzberg Diamonds lists it at $5,140. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.21
Carat
J
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2245114745
Dimensions7.09 × 5.43 × 3.74 mm
L/W Ratio1.31
Top View
7.09 mm5.43 mm1.21 ctJ / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2245114745
Side View
Table 70.0%CrownGirdle: Slightly ThickPavilionCulet: NoneDepth 68.9%

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 4
Current: $5,140 AUD|Low: $2,842 AUD|High: $5,140 AUD|Avg: $3,504 AUD
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 7, 2026
Retailer 9$2,842 AUD
Retailer 10$2,867 AUD
Retailer 8$2,876 AUD
Retailer 3$3,122 AUD
Retailer 2$3,135 AUD
Retailer 5$3,411 AUD
Retailer 11$3,644 AUD
Retailer 4$4,029 AUD
Retailer 7$4,372 AUD
Retailer 6$4,718 AUD
Helzberg Diamonds$5,140 AUD

8 data points across 11 retailers

11 retailers$2,842 AUD to $5,140 AUD

B+
Cheapest Retailer
-
$2,842 AUD
B+
Retailer 2
-
$2,867 AUD
View
B+
Retailer 3
-
$2,876 AUD
View
B+
Retailer 4
-
$3,122 AUD
View
B+
Retailer 5
-
$3,135 AUD
View
B+
Retailer 6
-
$3,411 AUD
View
B
Retailer 7
-
$3,644 AUD
View
B
Retailer 8
-
$4,029 AUD
View
B
Retailer 9
-
$4,372 AUD
View
B
Retailer 10
-
$4,718 AUD
View
Most Expensive
B
Helzberg Diamonds
XZRIIKLHHKNKL · Nov 6
$5,140 AUD
$3,532 USD
View
10 more retailers have this diamond
Prices start from $2,842 AUDSave up to $2,298 AUD

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+
1.21ct Radiant
$2,842 AUD