Round|Natural|GIA

1.09ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 1559989727

Certificate GIA 1559989727

Diamond specifications and retailer prices

From $3,745 USD
As of October 29, 2026
Save $3,419 USD (48%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $7,164 USD at NZ Jewellers · As of October 27, 2026
View at NZ Jewellers

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 1559989727. Listed at 10 retailers as of October 27, 2026, with prices from $3,745 to $7,164, a $3,419 spread on the same certified stone. NZ Jewellers lists it at $7,164. 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 angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 1559989727
Dimensions6.51 × 6.54 × 4.08 mm
L/W Ratio1.00
Girdle conditionSlightly Thick
Key to symbols
Crystal, Feather, Needle
Top View
6.51 mm6.54 mm1.09 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1559989727
Side View
Table 58.0%Crown 36°Girdle: Slightly ThickPavilion 40.8°Culet: NoneDepth 62.6%

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 29
Current: $7,164 USD|Low: $3,745 USD|High: $7,164 USD|Avg: $4,992 USD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 29, 2026
Retailer 7$3,745 USD
Retailer 9$3,915 USD
Retailer 3$3,980 USD
Retailer 5$4,112 USD
Retailer 8$4,112 USD
Retailer 6$4,255 USD
Retailer 10$4,409 USD
Retailer 2$4,637 USD
Retailer 4$6,914 USD
NZ Jewellers$7,164 USD

42 data points across 10 retailers

10 retailers$3,745 USD to $7,164 USD

B+
Cheapest Retailer
-
$3,745 USD
B+
Retailer 2
-
$3,915 USD
View
B+
Retailer 3
-
$3,980 USD
£3,134 GBP
View
B+
Retailer 4
-
$4,112 USD
View
B+
Retailer 5
-
$4,112 USD
View
B+
Retailer 6
-
$4,255 USD
View
B+
Retailer 7
-
$4,409 USD
A$6,783 AUD
View
Price last confirmed 25 days ago
B+
Retailer 8
-
$4,637 USD
View
B
Retailer 9
-
$6,914 USD
£5,444 GBP
View
Most Expensive
B
NZ Jewellers
7041e401-7015-401a-b08f-55c343acc911 · Oct 27
$7,164 USD
View
9 more retailers have this diamond
Prices start from $3,745 USDSave up to $3,419 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
$3,745 USD