Round|Natural|GIA

1.09ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 6502436101

Certificate GIA 6502436101

Diamond specifications and retailer prices

From $3,171 USD
As of October 27, 2026
Save $5,269 USD (62%) vs most expensive(unlock to see where)
27 retailers carry this diamond
Most expensive: $8,440 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 6502436101. Listed at 27 retailers as of October 27, 2026, with prices from $3,171 to $8,440, a $5,269 spread on the same certified stone. Diamond Quarter lists it at $8,440. 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°
Pavilion angle41.8°
OriginNatural
Grading LabGIA
CertificateGIA 6502436101
Dimensions6.67 × 6.65 × 4.06 mm
L/W Ratio1.00
Star length45%
Lower girdle75%
Top View
6.67 mm6.65 mm1.09 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6502436101
Side View
Table 59.0%Crown 33°Girdle: MED-STKPavilion 41.8°Culet: NoneDepth 61.0%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 27
Current: $4,262 USD|Low: $3,171 USD|High: $7,214 USD|Avg: $4,341 USD|+0.8%
Retailer 1
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Retailer 6
Retailer 7
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Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
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Retailer 15
Retailer 16
October 28, 2026
Retailer 7$3,171 USD
Retailer 16$3,393 USD
Retailer 3$3,527 USD
Retailer 15$3,655 USD
Retailer 13$3,818 USD
Retailer 8$3,861 USD
Retailer 1$4,262 USD
Retailer 4$4,290 USD
Retailer 14$4,290 USD
Retailer 2$4,380 USD
Retailer 11$4,440 USD
Retailer 6$4,546 USD
Retailer 5$4,773 USD
Retailer 12$4,782 USD
Retailer 9$5,137 USD
Retailer 10$7,064 USD

42 data points across 16 retailers

27 retailers$3,171 USD to $8,440 USD

A
Cheapest Retailer
-
$3,171 USD
Returns within 30 days
A
Retailer 2
-
$3,393 USD
View
Returns within 30 days
B+
Retailer 3
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$3,505 USD
View
Price last confirmed 23 days ago
Returns within 30 days
B+
Retailer 4
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$3,527 USD
View
Final sale: no returns
B+
Retailer 5
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$3,655 USD
View
Returns within 40 days
B+
Retailer 6
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$3,818 USD
View
Returns within 30 days
B+
Retailer 7
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$3,822 USD
View
Returns within 21 days
B+
Retailer 8
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$3,822 USD
View
Returns within 30 days
B+
Retailer 9
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$3,861 USD
View
Price last confirmed 51 days ago
Returns within 21 days
B+
Retailer 10
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$3,861 USD
View
Price last confirmed 30 days ago
Returns within 21 days
B+
Retailer 11
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$3,969 USD
View
B+
Retailer 12
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$4,262 USD
£3,356 GBP
View
Returns within 30 days
B+
Retailer 13
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$4,290 USD
View
Returns within 30 days
B+
Retailer 14
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$4,290 USD
View
Returns within 30 days
B+
Retailer 15
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$4,380 USD
View
Returns within 90 days
B+
Retailer 16
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$4,440 USD
View
Returns within 30 days
B+
Retailer 17
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$4,455 USD
View
Price last confirmed 52 days ago
Returns within 30 days
B+
Retailer 18
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$4,455 USD
View
Price last confirmed 29 days ago
Returns within 30 days
B+
Retailer 19
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$4,546 USD
A$6,994 AUD
View
Price last confirmed 19 days ago
B+
Retailer 20
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$4,773 USD
View
Returns within 30 days
B+
Retailer 21
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$4,782 USD
£3,765 GBP
View
Returns within 60 days
B+
Retailer 22
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$5,137 USD
ZAR 82,983 ZAR
View
Returns within 7 days
B
Retailer 23
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$7,064 USD
£5,562 GBP
View
B
Retailer 24
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$7,349 USD
View
Returns within 30 days
B
Retailer 25
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$7,425 USD
View
Price last confirmed 57 days ago
Returns within 30 days
B
Retailer 26
-
$7,425 USD
View
Price last confirmed 31 days ago
Returns within 30 days
Most Expensive
B
Diamond Quarter
1.09SI1E65017677N · Oct 28
$8,440 USD
£6,646 GBP
View
Returns within 30 days
26 more retailers have this diamond
Prices start from $3,171 USDSave up to $5,269 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.

A
1.09ct Round
$3,171 USD