Round|Natural|GIA

1.09ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 6502436101

Certificate GIA 6502436101

Diamond specifications and retailer prices

From £2,367 GBP

$3,171 USD

As of October 29, 2026

Save £3,932 GBP (62%) vs most expensive(unlock to see where)

27 retailers carry this diamond

Most expensive: £6,299 GBP at Diamond Quarter · As of October 28, 2026

View at Diamond Quarter

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 6502436101. Listed at 27 retailers as of October 28, 2026, with prices from £2,367 to £6,299, a £3,932 spread on the same certified stone. Diamond Quarter lists it at £6,299. 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

Colour

SI1

Clarity

Excellent

Cut

Specifications

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle33°

Pavilion angle41.8°

OriginNatural

Grading LabGIA

CertificateGIA 6502436101

Dimensions6.67 × 6.65 × 4.06 mm

L/W Ratio1.00

Star length45%

Lower girdle75%

View GIA Report →View Loupe360 Video →

Top View

OriginNatural

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateGIA 6502436101

Side View

Caratlytics Score

How it works →

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 29

Current: £3,200 GBP|Low: £2,367 GBP|High: £5,384 GBP|Avg: £3,215 GBP|+1.4%

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

Retailer 14

Retailer 15

Retailer 16

October 30, 2026

Retailer 7£2,367 GBP

Retailer 16£2,532 GBP

Retailer 3£2,632 GBP

Retailer 15£2,728 GBP

Retailer 13£2,849 GBP

Retailer 8£2,882 GBP

Retailer 1£3,200 GBP

Retailer 4£3,202 GBP

Retailer 14£3,202 GBP

Retailer 2£3,269 GBP

Retailer 11£3,314 GBP

Retailer 6£3,393 GBP

Retailer 5£3,562 GBP

Retailer 12£3,569 GBP

Retailer 9£3,834 GBP

Retailer 10£5,272 GBP

44 data points across 16 retailers

27 retailers£2,367 GBP to £6,299 GBP

Cheapest Retailer

£2,367 GBP

$3,171 USD

Retailer 2

£2,532 GBP

$3,393 USD

View

Retailer 3

£2,616 GBP

$3,505 USD

View

Price last confirmed 25 days ago

B+

Retailer 4

£2,632 GBP

$3,527 USD

View

Final sale: no returns

B+

Retailer 5

£2,728 GBP

$3,655 USD

View

B+

Retailer 6

£2,849 GBP

$3,818 USD

View

B+

Retailer 7

£2,852 GBP

$3,822 USD

View

B+

Retailer 8

£2,852 GBP

$3,822 USD

View

Retailer 9

£2,882 GBP

$3,861 USD

View

Price last confirmed 53 days ago

Retailer 10

£2,882 GBP

$3,861 USD

View

Price last confirmed 31 days ago

B+

Retailer 11

£2,962 GBP

$3,969 USD

View

B+

Retailer 12

£3,200 GBP

View

B+

Retailer 13

£3,202 GBP

$4,290 USD

View

B+

Retailer 14

£3,202 GBP

$4,290 USD

View

B+

Retailer 15

£3,269 GBP

$4,380 USD

View

B+

Retailer 16

£3,314 GBP

$4,440 USD

View

Retailer 17

£3,325 GBP

$4,455 USD

View

Price last confirmed 53 days ago

Retailer 18

£3,325 GBP

$4,455 USD

View

Price last confirmed 31 days ago

Retailer 19

£3,393 GBP

A$6,994 AUD

View

Price last confirmed 20 days ago

Retailer 20

£3,562 GBP

$4,773 USD

View

Price last confirmed 7 days ago

B+

Retailer 21

£3,569 GBP

View

B+

Retailer 22

£3,834 GBP

ZAR 82,983 ZAR

View

Retailer 23

£5,272 GBP

View

Retailer 24

£5,485 GBP

$7,349 USD

View

Retailer 25

£5,542 GBP

$7,425 USD

View

Price last confirmed 59 days ago

Retailer 26

£5,542 GBP

$7,425 USD

View

Price last confirmed 32 days ago

Most Expensive

Diamond Quarter

1.09SI1E65017677N · Oct 28

£6,299 GBP

View

26 more retailers have this diamond

Prices start from £2,367 GBPSave up to £3,932 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.

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