Round|Natural|GIA

1.23ct J SI2 Round Natural Diamond

EX • J/SI2 • GIA 1246042751

Certificate GIA 1246042751

Diamond specifications and retailer prices

From $1,936 USD
As of October 30, 2026
11 retailers carry this diamond
Most expensive: $4,396 USD at NZ Jewellers · As of October 23, 2026
View at NZ Jewellers

About this 1.23ct natural round diamond

This 1.23ct natural round sits in the classic one-carat band, graded J colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1246042751. Listed at 11 retailers as of October 30, 2026. 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
J
Color
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceMedium
Pavilion angle41.8°
OriginNatural
Grading LabGIA
CertificateGIA 1246042751
Dimensions6.85 × 6.88 × 4.28 mm
L/W Ratio1.00
Key to symbols
Twinning Wisp, Cloud, Crystal, Feather
Top View
6.85 mm6.88 mm1.23 ctJ / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceMedium
CertificateGIA 1246042751
Side View
Table 59.0%CrownGirdle: THN-STKPavilion 41.8°Culet: NoneDepth 62.3%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 30
Current: $4,396 USD|Low: $1,497 USD|High: $4,577 USD|Avg: $2,641 USD|-4.0%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 29, 2026
Retailer 10$1,497 USD
Retailer 3$1,936 USD
Retailer 5$1,993 USD
Retailer 8$2,060 USD
Retailer 11$2,103 USD
Retailer 7$2,155 USD
Retailer 4$2,270 USD
Retailer 2$2,779 USD
Retailer 9$3,150 USD
Retailer 6$3,628 USD
NZ Jewellers$4,396 USD

37 data points across 11 retailers

11 retailers

Retailer 1
-
$1,497 USD
Price last confirmed 8 days ago
A
Retailer 2
-
$1,936 USD
View
Retailer 3
-
$1,993 USD
View
Price last confirmed 8 days ago
Retailer 4
-
$2,060 USD
View
Price last confirmed 9 days ago
Retailer 5
-
$2,103 USD
View
Price last confirmed 12 days ago
Retailer 6
-
$2,155 USD
View
Price last confirmed 8 days ago
Retailer 7
-
$2,270 USD
View
Price last confirmed 8 days ago
Retailer 8
-
$2,779 USD
View
Price last confirmed 8 days ago
Retailer 9
-
$3,150 USD
View
Price last confirmed 9 days ago
Retailer 10
-
$3,628 USD
View
Price last confirmed 8 days ago
Most Expensive
NZ Jewellers
d65ba1e6-ba27-432e-9ef9-e3be631436f9 · Oct 23
$4,396 USD
View
Price last confirmed 13 days ago
10 more retailers have this diamond
Prices start from $1,936 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 Round
$1,936 USD