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Round|Natural|GIA

1.09ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 6227528327

Certificate GIA 6227528327

Diamond specifications and retailer prices

From $7,641 AUD
£4,226 GBP
As of October 31, 2026
Save $8,730 AUD (53%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $16,370 AUD at Diamond Quarter · As of October 29, 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 29, 2026, with prices from $7,641 to $16,370, a $8,730 spread on the same certified stone. Diamond Quarter lists it at $16,370. 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 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 31
Current: $7,641 AUD|Low: $6,371 AUD|High: $12,706 AUD|Avg: $8,840 AUD|+1.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 31, 2026
Retailer 4$6,371 AUD
Retailer 1$7,641 AUD
Retailer 5$7,896 AUD
Retailer 6$8,697 AUD
Retailer 2$8,943 AUD
Retailer 3$12,623 AUD

40 data points across 6 retailers

7 retailers$7,641 AUD to $16,370 AUD

Retailer 1
-
$6,371 AUD
$4,475 USD
Price last confirmed 13 days ago
B+
Retailer 2
-
$7,641 AUD
£4,226 GBP
View
Retailer 3
-
$7,896 AUD
View
Price last confirmed 21 days ago
Retailer 4
-
$8,697 AUD
$6,109 USD
View
Price last confirmed 8 days ago
B
Retailer 5
-
$8,943 AUD
€5,983 EUR
View
B
Retailer 6
-
$12,623 AUD
£6,982 GBP
View
Most Expensive
B
Diamond Quarter
1.09SI1E62272A43N · Oct 29
$16,370 AUD
£9,055 GBP
View
6 more retailers have this diamond
Prices start from $7,641 AUDSave up to $8,730 AUD

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
$7,641 AUD