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Radiant|Natural|GIA

1.23ct K SI2 Radiant Natural Diamond

EX • K/SI2 • GIA 6505348349

Certificate GIA 6505348349

Diamond specifications and retailer prices

From $1,899 AUD
As of November 6, 2026
Save $2,422 AUD (56%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $6,069 AUD at NZ Jewellers · As of October 17, 2026
View at NZ Jewellers

About this 1.23ct natural radiant diamond

This 1.23ct natural radiant sits in the classic one-carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6505348349. Listed at 15 retailers as of November 4, 2026, with a 128% 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

1.23
Carat
K
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6505348349
Dimensions7.96 × 5.26 × 3.46 mm
L/W Ratio1.51
Top View
7.96 mm5.26 mm1.23 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6505348349
Side View
Table 68.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 65.7%

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: Nov 6
Current: $6,069 AUD|Low: $1,899 AUD|High: $6,069 AUD|Avg: $3,236 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 7, 2026
Retailer 10$1,899 AUD
Retailer 4$1,982 AUD
Retailer 3$2,487 AUD
Retailer 5$2,529 AUD
Retailer 7$2,628 AUD
Retailer 9$2,672 AUD
Retailer 2$2,745 AUD
Retailer 11$2,870 AUD
Retailer 6$3,359 AUD
Retailer 8$4,321 AUD
NZ Jewellers$6,069 AUD

28 data points across 11 retailers

15 retailers$1,899 AUD to $4,321 AUD

A
Cheapest Retailer
-
$1,899 AUD
A
Retailer 2
-
$1,982 AUD
View
A
Retailer 3
-
$2,406 AUD
View
Retailer 4
-
$2,487 AUD
View
Price last confirmed 22 days ago
Retailer 5
-
$2,487 AUD
View
Price last confirmed 20 days ago
A
Retailer 6
-
$2,529 AUD
View
Retailer 7
-
$2,602 AUD
View
Price last confirmed 22 days ago
A
Retailer 8
-
$2,628 AUD
View
A
Retailer 9
-
$2,646 AUD
View
A
Retailer 10
-
$2,672 AUD
View
B+
Retailer 11
-
$2,745 AUD
View
Retailer 12
-
$2,870 AUD
View
Price last confirmed 19 days ago
B+
Retailer 13
-
$3,359 AUD
View
B
Retailer 14
-
$4,321 AUD
View
Most Expensive
NZ Jewellers
d5949011-2101-40be-be27-5772d0b8fe58 · Oct 17
$6,069 AUD
$4,170 USD
View
Price last confirmed 20 days ago
14 more retailers have this diamond
Prices start from $1,899 AUDSave up to $2,422 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.

A
1.23ct Radiant
$1,899 AUD