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Round|Natural|GIA

1.09ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 2556600262

Certificate GIA 2556600262

Diamond specifications and retailer prices

From $3,415 AUD
$2,399 USD
As of October 30, 2026
Save $654 AUD (16%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $4,070 AUD at GemTrove · As of October 31, 2026
View at GemTrove

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 2556600262. Listed at 6 retailers as of October 30, 2026, with prices from $3,415 to $4,070, a $654 spread on the same certified stone. GemTrove lists it at $4,070. 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
FluorescenceStrong
Crown angle35°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2556600262
Dimensions6.58 × 6.53 × 4.10 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Crystal, Cloud, Natural
Top View
6.58 mm6.53 mm1.09 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 2556600262
Side View
Table 57.0%Crown 35°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.5%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $4,070 AUD|Low: $3,018 AUD|High: $4,235 AUD|Avg: $3,718 AUD
GemTrove
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 31, 2026
Retailer 3$3,415 AUD
Retailer 4$3,458 AUD
Retailer 6$3,503 AUD
Retailer 2$3,682 AUD
Retailer 5$3,946 AUD
GemTrove$4,070 AUD

39 data points across 6 retailers

6 retailers$3,415 AUD to $4,070 AUD

A
Cheapest Retailer
-
$3,415 AUD
$2,399 USD
A
Retailer 2
-
$3,458 AUD
$2,429 USD
View
Final sale: no returns
A
Retailer 3
-
$3,503 AUD
MYR 10,024 MYR
View
A
Retailer 4
-
$3,682 AUD
£2,037 GBP
View
A
Retailer 5
-
$3,946 AUD
SGD 3,746 SGD
View
Most Expensive
A
GemTrove
GT-N-01363343-98 · Oct 31
$4,070 AUD
View
5 more retailers have this diamond
Prices start from $3,415 AUDSave up to $654 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.

A
1.09ct Round
$3,415 AUD