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Round|Natural|GIA

1.00ct H SI1 Round Natural Diamond

GD • H/SI1 • GIA 2556450106

Certificate GIA 2556450106

Diamond specifications and retailer prices

From €1,386 EUR
HK$12,100 HKD
As of October 31, 2026
Save €2,940 EUR (68%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: €4,326 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by GIA 2556450106. Listed at 25 retailers as of October 30, 2026, with prices from €1,386 to €4,326, a €2,940 spread on the same certified stone. NZ Jewellers lists it at €4,326. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.00
Carat
H
Color
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryGood
FluorescenceFaint
Crown angle40°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2556450106
Dimensions6.02 × 6.11 × 4.09 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Feather, Cloud, Pinpoint, Indented Natural, Natural
Top View
6.02 mm6.11 mm1.00 ctH / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryGood
FluorescenceFaint
CertificateGIA 2556450106
Side View
Table 59.0%Crown 40°Girdle: MED-VTKPavilion 41°Culet: NoneDepth 67.4%

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: €4,326 EUR|Low: €1,375 EUR|High: €4,326 EUR|Avg: €2,121 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
October 31, 2026
Retailer 13€1,386 EUR
Retailer 2€1,399 EUR
Retailer 7€1,594 EUR
Retailer 15€1,602 EUR
Retailer 11€1,637 EUR
Retailer 10€1,661 EUR
Retailer 8€1,772 EUR
Retailer 3€1,774 EUR
Retailer 6€1,774 EUR
Retailer 19€1,808 EUR
Retailer 21€1,831 EUR
Retailer 5€1,856 EUR
Retailer 23€1,897 EUR
Retailer 12€1,925 EUR
Retailer 24€1,934 EUR
Retailer 9€2,046 EUR
Retailer 14€2,046 EUR
Retailer 20€2,180 EUR
Retailer 18€2,301 EUR
Retailer 25€2,386 EUR
Retailer 22€2,591 EUR
Retailer 16€2,605 EUR
Retailer 17€2,678 EUR
Retailer 4€3,124 EUR
NZ Jewellers€4,326 EUR

27 data points across 25 retailers

25 retailers€1,386 EUR to €4,326 EUR

B+
Cheapest Retailer
-
€1,386 EUR
HK$12,100 HKD
A
Retailer 2
-
€1,399 EUR
₹148,837 INR
View
B+
Retailer 3
-
€1,594 EUR
A$2,739 AUD
View
B+
Retailer 4
-
€1,602 EUR
$1,790 USD
View
B+
Retailer 5
-
€1,637 EUR
$1,829 USD
View
Final sale: no returns
B+
Retailer 6
-
€1,661 EUR
SGD 2,507 SGD
View
B+
Retailer 7
-
€1,772 EUR
$1,980 USD
View
B+
Retailer 8
-
€1,774 EUR
$1,982 USD
View
B+
Retailer 9
-
€1,774 EUR
$1,982 USD
View
B+
Retailer 10
-
€1,808 EUR
$2,020 USD
View
B+
Retailer 11
-
€1,831 EUR
$2,046 USD
View
B+
Retailer 12
-
€1,856 EUR
$2,073 USD
View
B+
Retailer 13
-
€1,897 EUR
$2,120 USD
View
B+
Retailer 14
-
€1,925 EUR
SGD 2,907 SGD
View
B+
Retailer 15
-
€1,934 EUR
£1,701 GBP
View
B+
Retailer 16
-
€2,046 EUR
£1,800 GBP
View
B+
Retailer 17
-
€2,046 EUR
$2,286 USD
View
B+
Retailer 18
-
€2,180 EUR
ZAR 39,349 ZAR
View
Retailer 19
-
€2,301 EUR
A$3,954 AUD
View
Price last confirmed 26 days ago
B+
Retailer 20
-
€2,386 EUR
View
B
Retailer 21
-
€2,591 EUR
$2,895 USD
View
B
Retailer 22
-
€2,605 EUR
$2,910 USD
View
B
Retailer 23
-
€2,678 EUR
$2,992 USD
View
B
Retailer 24
-
€3,124 EUR
£2,748 GBP
View
Most Expensive
C
NZ Jewellers
a8977eb8-a3da-4fd8-8ac7-0b132184bc8c · Oct 30
€4,326 EUR
$4,833 USD
View
24 more retailers have this diamond
Prices start from €1,386 EURSave up to €2,940 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
€1,386 EUR