Round|Natural|GIA

1.09ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 2566167756

Certificate GIA 2566167756

Diamond specifications and retailer prices

From $3,709 USD
£2,920 GBP
As of October 28, 2026
Save $3,393 USD (48%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $7,102 USD at NZ Jewellers · As of October 27, 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 27, 2026, with prices from $3,709 to $7,102, a $3,393 spread on the same certified stone. NZ Jewellers lists it at $7,102. 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
Color
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 →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 28
Current: $7,102 USD|Low: $3,675 USD|High: $7,102 USD|Avg: $4,738 USD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 29, 2026
Retailer 6$3,709 USD
Retailer 3$3,715 USD
Retailer 7$3,940 USD
Retailer 2$3,945 USD
Retailer 8$4,077 USD
Retailer 10$4,077 USD
Retailer 9$4,220 USD
Retailer 11$4,371 USD
Retailer 5$4,597 USD
Retailer 4$6,854 USD
NZ Jewellers$7,102 USD

38 data points across 11 retailers

11 retailers$3,709 USD to $7,102 USD

A
Cheapest Retailer
-
$3,709 USD
£2,920 GBP
Returns within 30 days
B+
Retailer 2
-
$3,715 USD
View
Returns within 30 days
B+
Retailer 3
-
$3,940 USD
View
Returns within 40 days
B+
Retailer 4
-
$3,945 USD
£3,106 GBP
View
Returns within 30 days
B+
Retailer 5
-
$4,077 USD
View
Returns within 21 days
B+
Retailer 6
-
$4,077 USD
View
B+
Retailer 7
-
$4,220 USD
View
Returns within 30 days
B+
Retailer 8
-
$4,371 USD
A$6,725 AUD
View
Price last confirmed 25 days ago
B+
Retailer 9
-
$4,597 USD
View
Returns within 10 days
B
Retailer 10
-
$6,854 USD
£5,397 GBP
View
Most Expensive
B
NZ Jewellers
23bae50b-c1d2-4e30-9ff8-e181c07234c8 · Oct 27
$7,102 USD
View
Returns within 30 days
10 more retailers have this diamond
Prices start from $3,709 USDSave up to $3,393 USD

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.

A
1.09ct Round
$3,709 USD