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1.23ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 1533621018

Certificate GIA 1533621018

Diamond specifications and retailer prices

From $9,008 NZD
As of November 4, 2026
Save $9,875 NZD (52%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $18,883 NZD at NZ Jewellers · As of November 5, 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 E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1533621018. Listed at 10 retailers as of November 4, 2026, with prices from $9,008 to $18,883, a $9,875 spread on the same certified stone. NZ Jewellers lists it at $18,883. 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
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 1533621018
Dimensions6.83 × 6.77 × 4.26 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Cloud, Crystal
Top View
6.83 mm6.77 mm1.23 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1533621018
Side View
Table 58.0%Crown 35°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 62.7%

Caratlytics Score

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

Price History

Last verified: Nov 4
Current: $18,883 NZD|Low: $9,008 NZD|High: $18,883 NZD|Avg: $11,929 NZD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 11$9,008 NZD
Retailer 3$9,583 NZD
Retailer 9$10,229 NZD
Retailer 10$10,229 NZD
Retailer 4$10,691 NZD
Retailer 2$10,803 NZD
Retailer 8$10,826 NZD
Retailer 7$11,801 NZD
Retailer 5$12,239 NZD
Retailer 6$16,588 NZD
NZ Jewellers$18,883 NZD

27 data points across 11 retailers

10 retailers$9,008 NZD to $18,883 NZD

B+
Cheapest Retailer
-
$9,008 NZD
B+
Retailer 2
-
$10,229 NZD
View
B+
Retailer 3
-
$10,229 NZD
View
B+
Retailer 4
-
$10,691 NZD
View
B+
Retailer 5
-
$10,803 NZD
View
B
Retailer 6
-
$10,826 NZD
View
B
Retailer 7
-
$11,801 NZD
View
B
Retailer 8
-
$12,239 NZD
View
B
Retailer 9
-
$16,588 NZD
View
Most Expensive
B
NZ Jewellers
0c31a0e1-85f9-4a60-822a-9c707874e1ce · Nov 5
$18,883 NZD
$10,615 USD
View
9 more retailers have this diamond
Prices start from $9,008 NZDSave up to $9,875 NZD

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+
1.23ct Round
$9,008 NZD