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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 £2,773 GBP
$3,715 USD
As of October 29, 2026
Save £2,528 GBP (48%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £5,300 GBP 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 £2,773 to £5,300, a £2,528 spread on the same certified stone. NZ Jewellers lists it at £5,300. 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: £5,300 GBP|Low: £2,743 GBP|High: £5,300 GBP|Avg: £3,491 GBP
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£2,773 GBP
Retailer 5£2,785 GBP
Retailer 4£2,936 GBP
Retailer 7£2,941 GBP
Retailer 8£3,043 GBP
Retailer 10£3,043 GBP
Retailer 9£3,150 GBP
Retailer 11£3,262 GBP
Retailer 2£3,431 GBP
Retailer 6£5,115 GBP
NZ Jewellers£5,300 GBP

38 data points across 11 retailers

11 retailers£2,773 GBP to £5,300 GBP

B+
Cheapest Retailer
-
£2,773 GBP
$3,715 USD
B+
Retailer 2
-
£2,785 GBP
View
B+
Retailer 3
-
£2,936 GBP
View
B+
Retailer 4
-
£2,941 GBP
$3,940 USD
View
B+
Retailer 5
-
£3,043 GBP
$4,077 USD
View
B+
Retailer 6
-
£3,043 GBP
$4,077 USD
View
B+
Retailer 7
-
£3,150 GBP
$4,220 USD
View
Retailer 8
-
£3,262 GBP
A$6,725 AUD
View
Price last confirmed 26 days ago
B+
Retailer 9
-
£3,431 GBP
$4,597 USD
View
B
Retailer 10
-
£5,115 GBP
View
Most Expensive
B
NZ Jewellers
23bae50b-c1d2-4e30-9ff8-e181c07234c8 · Oct 30
£5,300 GBP
$7,102 USD
View
10 more retailers have this diamond
Prices start from £2,773 GBPSave up to £2,528 GBP

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
£2,773 GBP