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Round|Natural|GIA

1.09ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 2566167756

Certificate GIA 2566167756

Diamond specifications and retailer prices

From €3,338 EUR
$3,715 USD
As of October 29, 2026
Save €3,043 EUR (48%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: €6,381 EUR at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.09ct natural round diamond

This 1.09ct 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 2566167756. Listed at 11 retailers as of October 29, 2026, with prices from €3,338 to €6,381, a €3,043 spread on the same certified stone. NZ Jewellers lists it at €6,381. 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

1.09
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2566167756
Dimensions6.52 × 6.56 × 4.11 mm
L/W Ratio1.01
Girdle conditionSlightly Thick
Key to symbols
Cloud, Crystal, Feather, Needle
Top View
6.52 mm6.56 mm1.09 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2566167756
Side View
Table 57.0%Crown 35.5°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.9%

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: Oct 29
Current: €6,381 EUR|Low: €3,302 EUR|High: €6,381 EUR|Avg: €4,203 EUR
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 30, 2026
Retailer 3€3,338 EUR
Retailer 5€3,352 EUR
Retailer 4€3,535 EUR
Retailer 7€3,540 EUR
Retailer 8€3,663 EUR
Retailer 10€3,663 EUR
Retailer 9€3,792 EUR
Retailer 11€3,927 EUR
Retailer 2€4,130 EUR
Retailer 6€6,158 EUR
NZ Jewellers€6,381 EUR

38 data points across 11 retailers

11 retailers€3,338 EUR to €6,381 EUR

B+
Cheapest Retailer
-
€3,338 EUR
$3,715 USD
B+
Retailer 2
-
€3,352 EUR
£2,938 GBP
View
B+
Retailer 3
-
€3,535 EUR
£3,098 GBP
View
B+
Retailer 4
-
€3,540 EUR
$3,940 USD
View
B+
Retailer 5
-
€3,663 EUR
$4,077 USD
View
B+
Retailer 6
-
€3,663 EUR
$4,077 USD
View
B+
Retailer 7
-
€3,792 EUR
$4,220 USD
View
Retailer 8
-
€3,927 EUR
A$6,725 AUD
View
Price last confirmed 26 days ago
B+
Retailer 9
-
€4,130 EUR
$4,597 USD
View
B
Retailer 10
-
€6,158 EUR
£5,397 GBP
View
Most Expensive
B
NZ Jewellers
23bae50b-c1d2-4e30-9ff8-e181c07234c8 · Oct 30
€6,381 EUR
$7,102 USD
View
10 more retailers have this diamond
Prices start from €3,338 EURSave up to €3,043 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+
1.09ct Round
€3,338 EUR