Round|Natural|GIA

1.23ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 1533621018

Certificate GIA 1533621018

Diamond specifications and retailer prices

From €4,512 EUR
As of November 4, 2026
Save €4,946 EUR (52%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: €9,457 EUR 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 €4,512 to €9,457, a €4,946 spread on the same certified stone. NZ Jewellers lists it at €9,457. 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: €9,457 EUR|Low: €4,512 EUR|High: €9,457 EUR|Avg: €5,974 EUR
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€4,512 EUR
Retailer 3€4,800 EUR
Retailer 9€5,123 EUR
Retailer 10€5,123 EUR
Retailer 2€5,355 EUR
Retailer 4€5,407 EUR
Retailer 8€5,422 EUR
Retailer 7€5,911 EUR
Retailer 5€6,130 EUR
Retailer 6€8,308 EUR
NZ Jewellers€9,457 EUR

27 data points across 11 retailers

10 retailers€4,512 EUR to €9,457 EUR

B+
Cheapest Retailer
-
€4,512 EUR
B+
Retailer 2
-
€5,123 EUR
View
B+
Retailer 3
-
€5,123 EUR
View
B+
Retailer 4
-
€5,355 EUR
View
B+
Retailer 5
-
€5,407 EUR
View
B
Retailer 6
-
€5,422 EUR
View
B
Retailer 7
-
€5,911 EUR
View
B
Retailer 8
-
€6,130 EUR
View
B
Retailer 9
-
€8,308 EUR
View
Most Expensive
B
NZ Jewellers
0c31a0e1-85f9-4a60-822a-9c707874e1ce · Nov 5
€9,457 EUR
$10,615 USD
View
9 more retailers have this diamond
Prices start from €4,512 EURSave up to €4,946 EUR

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
€4,512 EUR