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Round|Natural|GIA

1.00ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 2566189059

Certificate GIA 2566189059

Diamond specifications and retailer prices

From €2,188 EUR
$2,445 USD
As of October 30, 2026
Save €3,451 EUR (61%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: €5,639 EUR at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1ct natural round diamond

This 1ct 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 2566189059. Listed at 22 retailers as of October 30, 2026, with prices from €2,188 to €5,639, a €3,451 spread on the same certified stone. NZ Jewellers lists it at €5,639. 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

1.00
Carat
I
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle33°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 2566189059
Dimensions6.41 × 6.44 × 3.96 mm
L/W Ratio1.00
Culet sizeNone
Top View
6.41 mm6.44 mm1.00 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 2566189059
Side View
Table 59.0%Crown 33°Girdle: THN-STKPavilion 41.6°Culet: NoneDepth 61.6%

Caratlytics Score

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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 30
Current: €5,639 EUR|Low: €1,751 EUR|High: €5,639 EUR|Avg: €2,550 EUR
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
Retailer 17
Retailer 18
Retailer 19
Retailer 20
Retailer 21
Retailer 22
Retailer 23
Retailer 24
Retailer 25
Retailer 26
Retailer 27
October 31, 2026
Retailer 10€1,751 EUR
Retailer 16€1,851 EUR
Retailer 12€1,902 EUR
Retailer 8€1,924 EUR
Retailer 19€2,070 EUR
Retailer 3€2,188 EUR
Retailer 14€2,253 EUR
Retailer 5€2,260 EUR
Retailer 9€2,385 EUR
Retailer 18€2,386 EUR
Retailer 4€2,403 EUR
Retailer 11€2,410 EUR
Retailer 25€2,444 EUR
Retailer 27€2,444 EUR
Retailer 26€2,538 EUR
Retailer 21€2,603 EUR
Retailer 6€2,771 EUR
Retailer 7€2,820 EUR
Retailer 22€2,867 EUR
Retailer 20€2,950 EUR
Retailer 15€3,104 EUR
Retailer 23€3,132 EUR
Retailer 13€3,159 EUR
Retailer 2€3,315 EUR
Retailer 17€3,407 EUR
Retailer 24€4,535 EUR
NZ Jewellers€5,639 EUR

27 data points across 27 retailers

22 retailers€2,188 EUR to €5,639 EUR

Retailer 1
-
€1,902 EUR
$2,124 USD
Price last confirmed 17 days ago
Retailer 2
-
€1,924 EUR
$2,150 USD
View
Price last confirmed 17 days ago
Retailer 3
-
€2,070 EUR
SGD 3,125 SGD
View
Price last confirmed 17 days ago
B+
Retailer 4
-
€2,188 EUR
$2,445 USD
View
B+
Retailer 5
-
€2,242 EUR
$2,505 USD
View
B+
Retailer 6
-
€2,260 EUR
$2,525 USD
View
B+
Retailer 7
-
€2,403 EUR
$2,685 USD
View
Retailer 8
-
€2,410 EUR
£2,120 GBP
View
Price last confirmed 15 days ago
B+
Retailer 9
-
€2,444 EUR
$2,730 USD
View
B+
Retailer 10
-
€2,444 EUR
$2,730 USD
View
B+
Retailer 11
-
€2,538 EUR
$2,835 USD
View
B+
Retailer 12
-
€2,603 EUR
£2,290 GBP
View
B
Retailer 13
-
€2,771 EUR
$3,096 USD
View
B
Retailer 14
-
€2,819 EUR
$3,149 USD
View
B
Retailer 15
-
€2,820 EUR
$3,150 USD
View
B
Retailer 16
-
€2,867 EUR
£2,522 GBP
View
Retailer 17
-
€3,104 EUR
$3,467 USD
View
Price last confirmed 17 days ago
B
Retailer 18
-
€3,159 EUR
View
B
Retailer 19
-
€3,315 EUR
ZAR 59,837 ZAR
View
Retailer 20
-
€3,407 EUR
$3,806 USD
View
Price last confirmed 16 days ago
B
Retailer 21
-
€4,535 EUR
£3,989 GBP
View
Most Expensive
B
NZ Jewellers
6443b987-1d38-4d76-b20b-560ff4338924 · Oct 30
€5,639 EUR
$6,300 USD
View
21 more retailers have this diamond
Prices start from €2,188 EURSave up to €3,451 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.

B+
1.00ct Round
€2,188 EUR