Round|Natural|GIA

1.09ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 6522850805

Certificate GIA 6522850805

Diamond specifications and retailer prices

From £2,926 GBP
$3,896 USD
As of October 30, 2026
Save £2,868 GBP (50%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £5,822 GBP at NZ Jewellers · As of September 28, 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 6522850805. Listed at 19 retailers as of October 30, 2026, with a 98% 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

1.09
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6522850805
Dimensions6.60 × 6.56 × 4.05 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Top View
6.60 mm6.56 mm1.09 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6522850805
Side View
Table 57.0%Crown 36°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 61.8%

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: £3,381 GBP|Low: £2,827 GBP|High: £5,386 GBP|Avg: £3,481 GBP|+2.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 30, 2026
Retailer 10£2,926 GBP
Retailer 3£2,988 GBP
Retailer 5£3,011 GBP
Retailer 2£3,069 GBP
Retailer 12£3,150 GBP
Retailer 9£3,325 GBP
Retailer 1£3,381 GBP
Retailer 11£3,437 GBP
Retailer 13£3,448 GBP
Retailer 4£3,565 GBP
Retailer 8£3,748 GBP
Retailer 7£4,049 GBP
Retailer 6£5,325 GBP

44 data points across 13 retailers

19 retailers£2,926 GBP to £5,793 GBP

B+
Cheapest Retailer
-
£2,926 GBP
$3,896 USD
B+
Retailer 2
-
£2,988 GBP
SGD 5,378 SGD
View
Retailer 3
-
£3,011 GBP
$4,010 USD
View
Price last confirmed 23 days ago
B+
Retailer 4
-
£3,069 GBP
$4,087 USD
View
Final sale: no returns
B+
Retailer 5
-
£3,150 GBP
$4,195 USD
View
B+
Retailer 6
-
£3,325 GBP
$4,428 USD
View
B+
Retailer 7
-
£3,325 GBP
$4,428 USD
View
B+
Retailer 8
-
£3,325 GBP
$4,428 USD
View
Retailer 9
-
£3,342 GBP
$4,450 USD
View
Price last confirmed 31 days ago
B+
Retailer 10
-
£3,381 GBP
View
B+
Retailer 11
-
£3,437 GBP
$4,578 USD
View
B+
Retailer 12
-
£3,448 GBP
$4,592 USD
View
Retailer 13
-
£3,565 GBP
A$7,303 AUD
View
Price last confirmed 20 days ago
B+
Retailer 14
-
£3,748 GBP
View
Retailer 15
-
£3,856 GBP
$5,135 USD
View
Price last confirmed 30 days ago
B
Retailer 16
-
£4,049 GBP
ZAR 87,118 ZAR
View
B
Retailer 17
-
£5,325 GBP
View
B
Retailer 18
-
£5,793 GBP
$7,715 USD
View
Most Expensive
NZ Jewellers
6b55c98d-cb82-4104-94c6-1c51bc4e06db · Sep 28
£5,822 GBP
$7,753 USD
View
Price last confirmed 32 days ago
18 more retailers have this diamond
Prices start from £2,926 GBPSave up to £2,868 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
£2,926 GBP