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Round|Natural|GIA

1.09ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 1553602254

Certificate GIA 1553602254

Diamond specifications and retailer prices

From £2,068 GBP
A$4,236 AUD
As of October 29, 2026
Save £2,196 GBP (52%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £4,264 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 1553602254. Listed at 8 retailers as of October 29, 2026, with prices from £2,068 to £4,264, a £2,196 spread on the same certified stone. NZ Jewellers lists it at £4,264. 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
FluorescenceMedium
Crown angle35°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 1553602254
Dimensions6.60 × 6.57 × 4.05 mm
L/W Ratio1.00
Star length50%
Culet sizeNone
Key to symbols
Crystal, Twinning Wisp, Feather
Top View
6.60 mm6.57 mm1.09 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 1553602254
Side View
Table 60.0%Crown 35°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 61.5%

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 29
Current: £4,115 GBP|Low: £1,783 GBP|High: £4,142 GBP|Avg: £2,768 GBP|+0.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 29, 2026
Retailer 4£2,259 GBP
Retailer 5£2,335 GBP
Retailer 2£2,718 GBP
Retailer 6£2,740 GBP
Retailer 3£2,837 GBP
Retailer 1£4,115 GBP

21 data points across 6 retailers

8 retailers£2,068 GBP to £4,264 GBP

A
Cheapest Retailer
-
£2,068 GBP
A$4,236 AUD
A
Retailer 2
-
£2,259 GBP
$3,008 USD
View
Final sale: no returns
A
Retailer 3
-
£2,335 GBP
$3,110 USD
View
B+
Retailer 4
-
£2,718 GBP
€3,447 EUR
View
B+
Retailer 5
-
£2,740 GBP
$3,649 USD
View
B+
Retailer 6
-
£2,837 GBP
View
B
Retailer 7
-
£4,115 GBP
View
Most Expensive
B
NZ Jewellers
5cd2d617-eb4b-4060-a75c-fd6f281c4b34 · Oct 30
£4,264 GBP
$5,678 USD
View
7 more retailers have this diamond
Prices start from £2,068 GBPSave up to £2,196 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.

A
1.09ct Round
£2,068 GBP