Radiant|Natural|GIA

1.23ct K SI2 Radiant Natural Diamond

EX • K/SI2 • GIA 6505348349

Certificate GIA 6505348349

Diamond specifications and retailer prices

From $1,305 USD
As of November 6, 2026
Save $1,664 USD (56%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $4,170 USD 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
Color
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: $4,170 USD|Low: $1,305 USD|High: $4,170 USD|Avg: $2,223 USD
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$1,305 USD
Retailer 4$1,362 USD
Retailer 3$1,709 USD
Retailer 5$1,738 USD
Retailer 7$1,806 USD
Retailer 9$1,836 USD
Retailer 2$1,886 USD
Retailer 11$1,972 USD
Retailer 6$2,308 USD
Retailer 8$2,969 USD
NZ Jewellers$4,170 USD

28 data points across 11 retailers

15 retailers$1,305 USD to $2,969 USD

A
Cheapest Retailer
-
$1,305 USD
A
Retailer 2
-
$1,362 USD
View
A
Retailer 3
-
$1,653 USD
View
Retailer 4
-
$1,709 USD
View
Price last confirmed 22 days ago
Retailer 5
-
$1,709 USD
View
Price last confirmed 20 days ago
A
Retailer 6
-
$1,738 USD
View
Retailer 7
-
$1,788 USD
View
Price last confirmed 22 days ago
A
Retailer 8
-
$1,806 USD
View
A
Retailer 9
-
$1,818 USD
View
A
Retailer 10
-
$1,836 USD
View
B+
Retailer 11
-
$1,886 USD
View
Retailer 12
-
$1,972 USD
View
Price last confirmed 19 days ago
B+
Retailer 13
-
$2,308 USD
View
B
Retailer 14
-
$2,969 USD
View
Most Expensive
NZ Jewellers
d5949011-2101-40be-be27-5772d0b8fe58 · Oct 17
$4,170 USD
View
Price last confirmed 20 days ago
14 more retailers have this diamond
Prices start from $1,305 USDSave up to $1,664 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
1.23ct Radiant
$1,305 USD