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Round|Natural|GIA

1.09ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 2556600262

Certificate GIA 2556600262

Diamond specifications and retailer prices

From £1,790 GBP
$2,399 USD
As of October 30, 2026
Save £343 GBP (16%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £2,134 GBP at GemTrove · As of October 29, 2026
View at GemTrove

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 2556600262. Listed at 6 retailers as of October 29, 2026, with prices from £1,790 to £2,134, a £343 spread on the same certified stone. GemTrove lists it at £2,134. 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
FluorescenceStrong
Crown angle35°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2556600262
Dimensions6.58 × 6.53 × 4.10 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Crystal, Cloud, Natural
Top View
6.58 mm6.53 mm1.09 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 2556600262
Side View
Table 57.0%Crown 35°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.5%

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 30
Current: £2,134 GBP|Low: £1,582 GBP|High: £2,220 GBP|Avg: £1,950 GBP
GemTrove
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 30, 2026
Retailer 3£1,790 GBP
Retailer 4£1,813 GBP
Retailer 6£1,837 GBP
Retailer 2£1,930 GBP
Retailer 5£2,069 GBP
GemTrove£2,134 GBP

39 data points across 6 retailers

6 retailers£1,790 GBP to £2,134 GBP

A
Cheapest Retailer
-
£1,790 GBP
$2,399 USD
A
Retailer 2
-
£1,813 GBP
$2,429 USD
View
Final sale: no returns
A
Retailer 3
-
£1,837 GBP
MYR 10,024 MYR
View
A
Retailer 4
-
£1,930 GBP
View
A
Retailer 5
-
£2,069 GBP
SGD 3,746 SGD
View
Most Expensive
A
GemTrove
GT-N-01363343-98 · Oct 29
£2,134 GBP
A$4,398 AUD
View
5 more retailers have this diamond
Prices start from £1,790 GBPSave up to £343 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
£1,790 GBP