Round|Natural|GIA

1.23ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 1236874082

Certificate GIA 1236874082

Diamond specifications and retailer prices

From €3,813 EUR
As of November 3, 2026
Save €2,605 EUR (41%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: €7,022 EUR at NZ Jewellers · As of September 28, 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 1236874082. Listed at 9 retailers as of November 2, 2026, with a 68% 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
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 1236874082
Dimensions6.81 × 6.85 × 4.28 mm
L/W Ratio1.01
Girdle conditionMedium
Key to symbols
Crystal, Feather, Needle
Top View
6.81 mm6.85 mm1.23 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1236874082
Side View
Table 58.0%Crown 36°GirdlePavilion 41.2°CuletDepth 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 3
Current: €3,877 EUR|Low: €3,813 EUR|High: €6,497 EUR|Avg: €4,555 EUR|-1.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 2, 2026
Retailer 4€3,813 EUR
Retailer 1€3,877 EUR
Retailer 3€4,063 EUR
Retailer 6€4,248 EUR
Retailer 5€4,307 EUR
Retailer 7€4,612 EUR
Retailer 2€6,418 EUR

34 data points across 7 retailers

9 retailers€3,813 EUR to €6,418 EUR

B+
Cheapest Retailer
-
€3,813 EUR
B+
Retailer 2
-
€3,877 EUR
View
Retailer 3
-
€4,031 EUR
View
Price last confirmed 44 days ago
Retailer 4
-
€4,031 EUR
View
Price last confirmed 29 days ago
Retailer 5
-
€4,031 EUR
View
Price last confirmed 38 days ago
Retailer 6
-
€4,063 EUR
View
Price last confirmed 28 days ago
B
Retailer 7
-
€6,418 EUR
View
Retailer 8
-
€7,022 EUR
View
Price last confirmed 46 days ago
Most Expensive
NZ Jewellers
592b55dd-38c2-4ef5-bb14-41c224b1515c · Sep 28
€7,022 EUR
$7,881 USD
View
Price last confirmed 39 days ago
8 more retailers have this diamond
Prices start from €3,813 EURSave up to €2,605 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
€3,813 EUR