Round|Natural|GIA

1.09ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 6227528327

Certificate GIA 6227528327

Diamond specifications and retailer prices

From $6,861 SGD
£4,226 GBP
As of October 31, 2026
Save $7,839 SGD (53%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $14,701 SGD 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 $6,861 to $14,701, a $7,839 spread on the same certified stone. Diamond Quarter lists it at $14,701. 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: $6,861 SGD|Low: $5,721 SGD|High: $11,410 SGD|Avg: $7,938 SGD|+1.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 31, 2026
Retailer 4$5,721 SGD
Retailer 1$6,861 SGD
Retailer 5$7,090 SGD
Retailer 6$7,810 SGD
Retailer 2$8,031 SGD
Retailer 3$11,336 SGD

40 data points across 6 retailers

7 retailers$6,861 SGD to $14,701 SGD

Retailer 1
-
$5,721 SGD
$4,475 USD
Price last confirmed 13 days ago
B+
Retailer 2
-
$6,861 SGD
£4,226 GBP
View
Retailer 3
-
$7,090 SGD
A$8,533 AUD
View
Price last confirmed 21 days ago
Retailer 4
-
$7,810 SGD
$6,109 USD
View
Price last confirmed 8 days ago
B
Retailer 5
-
$8,031 SGD
€5,983 EUR
View
B
Retailer 6
-
$11,336 SGD
£6,982 GBP
View
Most Expensive
B
Diamond Quarter
1.09SI1E62272A43N · Oct 29
$14,701 SGD
£9,055 GBP
View
6 more retailers have this diamond
Prices start from $6,861 SGDSave up to $7,839 SGD

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
$6,861 SGD