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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 $5,289 AUD
$3,715 USD
As of October 30, 2026
Save $4,822 AUD (48%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $10,110 AUD 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 30, 2026, with prices from $5,289 to $10,110, a $4,822 spread on the same certified stone. NZ Jewellers lists it at $10,110. 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 30
Current: $10,110 AUD|Low: $5,231 AUD|High: $10,110 AUD|Avg: $6,659 AUD
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$5,289 AUD
Retailer 5$5,312 AUD
Retailer 4$5,601 AUD
Retailer 7$5,609 AUD
Retailer 8$5,804 AUD
Retailer 10$5,804 AUD
Retailer 9$6,008 AUD
Retailer 11$6,223 AUD
Retailer 2$6,544 AUD
Retailer 6$9,758 AUD
NZ Jewellers$10,110 AUD

38 data points across 11 retailers

11 retailers$5,289 AUD to $10,110 AUD

B+
Cheapest Retailer
-
$5,289 AUD
$3,715 USD
B+
Retailer 2
-
$5,312 AUD
£2,938 GBP
View
B+
Retailer 3
-
$5,601 AUD
£3,098 GBP
View
B+
Retailer 4
-
$5,609 AUD
$3,940 USD
View
B+
Retailer 5
-
$5,804 AUD
$4,077 USD
View
B+
Retailer 6
-
$5,804 AUD
$4,077 USD
View
B+
Retailer 7
-
$6,008 AUD
$4,220 USD
View
Retailer 8
-
$6,223 AUD
View
Price last confirmed 27 days ago
B+
Retailer 9
-
$6,544 AUD
$4,597 USD
View
B
Retailer 10
-
$9,758 AUD
£5,397 GBP
View
Most Expensive
B
NZ Jewellers
23bae50b-c1d2-4e30-9ff8-e181c07234c8 · Oct 30
$10,110 AUD
$7,102 USD
View
10 more retailers have this diamond
Prices start from $5,289 AUDSave up to $4,822 AUD

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
$5,289 AUD