Round|Natural|GIA

1.09ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 6227528327

Certificate GIA 6227528327

Diamond specifications and retailer prices

From $5,335 USD
£4,201 GBP
As of October 28, 2026
Save $3,532 USD (40%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $11,499 USD 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 6227528327. Listed at 7 retailers as of October 28, 2026, with a 66% 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
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.5°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 6227528327
Dimensions6.63 × 6.60 × 4.05 mm
L/W Ratio1.00
Star length50%
Lower girdle80%
Top View
6.63 mm6.60 mm1.09 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6227528327
Side View
Table 61.0%Crown 33.5°Girdle: MED-STKPavilion 41.6°Culet: NoneDepth 61.3%

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 28
Current: $8,867 USD|Low: $4,475 USD|High: $8,926 USD|Avg: $6,203 USD|+0.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 29, 2026
Retailer 4$4,475 USD
Retailer 2$5,335 USD
Retailer 5$5,546 USD
Retailer 6$6,109 USD
Retailer 3$6,233 USD
Retailer 1$8,867 USD

40 data points across 6 retailers

7 retailers$5,335 USD to $8,867 USD

B+
Retailer 1
-
$4,475 USD
Price last confirmed 11 days ago
B+
Retailer 2
-
$5,335 USD
£4,201 GBP
View
B
Retailer 3
-
$5,546 USD
A$8,533 AUD
View
Price last confirmed 19 days ago
B
Retailer 4
-
$6,109 USD
View
B
Retailer 5
-
$6,233 USD
€5,936 EUR
View
B
Retailer 6
-
$8,867 USD
£6,982 GBP
View
Most Expensive
B
Diamond Quarter
1.09SI1E62272A43N · Oct 28
$11,499 USD
£9,055 GBP
View
Price under review
6 more retailers have this diamond
Prices start from $5,335 USDSave up to $3,532 USD

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
$5,335 USD