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Round|Natural|GIA

1.09ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 2556309404

Certificate GIA 2556309404

Diamond specifications and retailer prices

From €1,941 EUR
₹206,491 INR
As of October 31, 2026
Save €3,370 EUR (63%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: €5,311 EUR at NZ Jewellers · As of October 30, 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2556309404. Listed at 18 retailers as of October 30, 2026, with prices from €1,941 to €5,311, a €3,370 spread on the same certified stone. NZ Jewellers lists it at €5,311. 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
I
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 2556309404
Dimensions6.53 × 6.57 × 4.10 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Twinning Wisp, Feather, Cloud, Crystal, Indented Natural
Top View
6.53 mm6.57 mm1.09 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2556309404
Side View
Table 59.0%Crown 35.5°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 62.6%

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 31
Current: €5,311 EUR|Low: €1,940 EUR|High: €5,501 EUR|Avg: €2,916 EUR|-1.8%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
November 1, 2026
Retailer 10€1,941 EUR
Retailer 8€2,275 EUR
Retailer 5€2,343 EUR
Retailer 4€2,367 EUR
Retailer 15€2,488 EUR
Retailer 7€2,540 EUR
Retailer 14€2,540 EUR
Retailer 16€2,638 EUR
Retailer 3€2,667 EUR
Retailer 9€2,699 EUR
Retailer 13€2,931 EUR
Retailer 6€2,967 EUR
Retailer 12€3,030 EUR
Retailer 11€3,122 EUR
Retailer 2€4,450 EUR
NZ Jewellers€5,311 EUR

22 data points across 16 retailers

18 retailers€1,941 EUR to €5,311 EUR

A
Cheapest Retailer
-
€1,941 EUR
₹206,491 INR
A
Retailer 2
-
€2,171 EUR
A$3,731 AUD
View
A
Retailer 3
-
€2,275 EUR
$2,542 USD
View
B+
Retailer 4
-
€2,343 EUR
$2,618 USD
View
Final sale: no returns
A
Retailer 5
-
€2,367 EUR
$2,644 USD
View
B+
Retailer 6
-
€2,488 EUR
$2,780 USD
View
B+
Retailer 7
-
€2,540 EUR
$2,838 USD
View
B+
Retailer 8
-
€2,540 EUR
$2,838 USD
View
B+
Retailer 9
-
€2,638 EUR
$2,947 USD
View
B+
Retailer 10
-
€2,667 EUR
$2,980 USD
View
B+
Retailer 11
-
€2,699 EUR
£2,374 GBP
View
Retailer 12
-
€2,923 EUR
A$5,023 AUD
View
Price last confirmed 24 days ago
B+
Retailer 13
-
€2,931 EUR
$3,274 USD
View
B+
Retailer 14
-
€2,967 EUR
£2,610 GBP
View
B+
Retailer 15
-
€3,030 EUR
View
B+
Retailer 16
-
€3,122 EUR
ZAR 56,349 ZAR
View
B
Retailer 17
-
€4,450 EUR
£3,915 GBP
View
Most Expensive
B
NZ Jewellers
d2758528-3b81-4eb0-8d32-df6188cd622f · Oct 30
€5,311 EUR
$5,933 USD
View
17 more retailers have this diamond
Prices start from €1,941 EURSave up to €3,370 EUR

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
€1,941 EUR