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Radiant|Natural|GIA

1.21ct E SI1 Radiant Natural Diamond

EX • E/SI1 • GIA 5231852725

Certificate GIA 5231852725

Diamond specifications and retailer prices

From $5,442 AUD
As of November 6, 2026
Save $6,848 AUD (56%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: $12,289 AUD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.21ct natural radiant diamond

This 1.21ct natural radiant sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5231852725. Listed at 25 retailers as of November 5, 2026, with prices from $5,442 to $12,289, a $6,848 spread on the same certified stone. NZ Jewellers lists it at $12,289. 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
E
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle55.91°
OriginNatural
Grading LabGIA
CertificateGIA 5231852725
Dimensions7.16 × 5.34 × 3.65 mm
L/W Ratio1.34
Top View
7.16 mm5.34 mm1.21 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5231852725
Side View
Table 67.0%CrownGirdle: ThickPavilion 55.91°Culet: NoneDepth 68.4%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $12,289 AUD|Low: $5,319 AUD|High: $12,289 AUD|Avg: $7,940 AUD
NZ Jewellers
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
Retailer 16
November 7, 2026
Retailer 6$6,145 AUD
Retailer 12$6,657 AUD
Retailer 14$6,657 AUD
Retailer 15$6,657 AUD
Retailer 8$6,769 AUD
Retailer 16$7,166 AUD
Retailer 2$7,235 AUD
Retailer 7$7,407 AUD
Retailer 3$7,626 AUD
Retailer 4$7,626 AUD
Retailer 13$7,682 AUD
Retailer 5$7,874 AUD
Retailer 9$8,268 AUD
Retailer 10$8,965 AUD
Retailer 11$11,703 AUD
NZ Jewellers$12,289 AUD

42 data points across 16 retailers

25 retailers$5,442 AUD to $12,289 AUD

B+
Cheapest Retailer
-
$5,442 AUD
B+
Retailer 2
-
$5,803 AUD
View
B+
Retailer 3
-
$5,806 AUD
View
B+
Retailer 4
-
$5,873 AUD
View
B+
Retailer 5
-
$6,072 AUD
View
B+
Retailer 6
-
$6,145 AUD
View
Final sale: no returns
B+
Retailer 7
-
$6,196 AUD
View
B+
Retailer 8
-
$6,295 AUD
View
B+
Retailer 9
-
$6,657 AUD
View
Retailer 10
-
$6,657 AUD
View
Price last confirmed 9 days ago
B+
Retailer 11
-
$6,657 AUD
View
B+
Retailer 12
-
$6,769 AUD
View
B
Retailer 13
-
$7,166 AUD
View
B+
Retailer 14
-
$7,235 AUD
View
Retailer 15
-
$7,407 AUD
View
Price last confirmed 29 days ago
B
Retailer 16
-
$7,574 AUD
View
B
Retailer 17
-
$7,626 AUD
View
B
Retailer 18
-
$7,626 AUD
View
B
Retailer 19
-
$7,682 AUD
View
B
Retailer 20
-
$7,874 AUD
View
Retailer 21
-
$8,112 AUD
View
Price last confirmed 15 days ago
B
Retailer 22
-
$8,268 AUD
View
B
Retailer 23
-
$8,965 AUD
View
B
Retailer 24
-
$11,703 AUD
View
Most Expensive
B
NZ Jewellers
af50deb8-0e02-43d3-920c-832d22555d90 · Nov 5
$12,289 AUD
$8,444 USD
View
24 more retailers have this diamond
Prices start from $5,442 AUDSave up to $6,848 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
$5,442 AUD