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Radiant|Natural|GIA

1.21ct G SI1 Radiant Natural Diamond

ID • G/SI1 • GIA 01

Certificate GIA 01

Diamond specifications and retailer prices

From $5,196 AUD
As of November 6, 2026
Save $1,262 AUD (20%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $6,458 AUD at Blue Nile · As of November 7, 2026
View at Blue Nile

About this 1.21ct natural radiant diamond

This 1.21ct natural radiant sits in the classic one-carat band, graded G 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. Listed at 3 retailers as of November 6, 2026, with prices from $5,196 to $6,458, a $1,262 spread on the same certified stone. Blue Nile lists it at $6,458. 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

1.21
Carat
G
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 01
Dimensions7.31 × 5.40 × 3.58 mm
L/W Ratio1.35
Top View
7.31 mm5.40 mm1.21 ctG / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 01
Side View
Table 68.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 66.2%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 6
Current: $6,458 AUD|Low: $5,127 AUD|High: $6,458 AUD|Avg: $5,573 AUD
Blue Nile
Retailer 2
Retailer 3
September 23, 2026
Retailer 2$5,196 AUD
Retailer 3$5,448 AUD
Blue Nile$6,458 AUD

4 data points across 3 retailers

3 retailers$5,196 AUD to $6,458 AUD

B+
Cheapest Retailer
-
$5,196 AUD
B+
Retailer 2
-
$5,448 AUD
View
Most Expensive
B
Blue Nile
28069118 · Nov 7
$6,458 AUD
$4,437 USD
View
2 more retailers have this diamond
Prices start from $5,196 AUDSave up to $1,262 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
$5,196 AUD