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Round|Natural|GIA

1.00ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 1423768522

Certificate GIA 1423768522

Diamond specifications and retailer prices

From €1,799 EUR
HK$15,700 HKD
As of October 31, 2026
Save €3,165 EUR (64%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: €4,964 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 1423768522. Listed at 23 retailers as of October 30, 2026, with prices from €1,799 to €4,964, a €3,165 spread on the same certified stone. NZ Jewellers lists it at €4,964. 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
FluorescenceNone
Crown angle35.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 1423768522
Dimensions6.36 × 6.39 × 3.95 mm
L/W Ratio1.00
Culet sizeNone
Top View
6.36 mm6.39 mm1.00 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1423768522
Side View
Table 60.0%Crown 35.5°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 62.0%

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: €4,964 EUR|Low: €1,719 EUR|High: €4,964 EUR|Avg: €2,513 EUR|+0.7%
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
October 31, 2026
Retailer 17€1,799 EUR
Retailer 11€1,839 EUR
Retailer 3€1,905 EUR
Retailer 6€1,942 EUR
Retailer 4€1,985 EUR
Retailer 10€1,985 EUR
Retailer 14€2,075 EUR
Retailer 19€2,144 EUR
Retailer 2€2,151 EUR
Retailer 12€2,171 EUR
Retailer 8€2,291 EUR
Retailer 18€2,344 EUR
Retailer 5€2,470 EUR
Retailer 7€2,470 EUR
Retailer 21€2,482 EUR
Retailer 20€2,523 EUR
Retailer 9€2,551 EUR
Retailer 22€2,785 EUR
Retailer 13€2,905 EUR
Retailer 16€2,918 EUR
Retailer 15€4,018 EUR
NZ Jewellers€4,964 EUR

17 data points across 22 retailers

23 retailers€1,799 EUR to €4,964 EUR

A
Cheapest Retailer
-
€1,799 EUR
HK$15,700 HKD
A
Retailer 2
-
€1,839 EUR
$2,055 USD
View
A
Retailer 3
-
€1,905 EUR
$2,128 USD
View
A
Retailer 4
-
€1,942 EUR
$2,170 USD
View
A
Retailer 5
-
€1,985 EUR
$2,218 USD
View
Final sale: no returns
A
Retailer 6
-
€1,985 EUR
$2,218 USD
View
A
Retailer 7
-
€2,075 EUR
$2,318 USD
View
A
Retailer 8
-
€2,144 EUR
$2,395 USD
View
A
Retailer 9
-
€2,151 EUR
$2,403 USD
View
A
Retailer 10
-
€2,171 EUR
$2,425 USD
View
B+
Retailer 11
-
€2,291 EUR
£2,016 GBP
View
B+
Retailer 12
-
€2,344 EUR
$2,619 USD
View
B+
Retailer 13
-
€2,470 EUR
$2,760 USD
View
B+
Retailer 14
-
€2,470 EUR
$2,760 USD
View
B+
Retailer 15
-
€2,482 EUR
$2,773 USD
View
B+
Retailer 16
-
€2,523 EUR
£2,219 GBP
View
B+
Retailer 17
-
€2,551 EUR
$2,850 USD
View
Retailer 18
-
€2,691 EUR
A$4,625 AUD
View
Price last confirmed 24 days ago
B+
Retailer 19
-
€2,785 EUR
View
B+
Retailer 20
-
€2,905 EUR
$3,245 USD
View
B+
Retailer 21
-
€2,918 EUR
ZAR 52,674 ZAR
View
B
Retailer 22
-
€4,018 EUR
£3,535 GBP
View
Most Expensive
B
NZ Jewellers
7330d7c4-5473-4174-83b5-06070554d291 · Oct 30
€4,964 EUR
$5,546 USD
View
22 more retailers have this diamond
Prices start from €1,799 EURSave up to €3,165 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
1.00ct Round
€1,799 EUR