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Round|Natural|GIA

1.05ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 6505241872

Certificate GIA 6505241872

Diamond specifications and retailer prices

From €1,603 EUR
As of November 6, 2026
Save €2,846 EUR (64%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: €4,449 EUR at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.05ct natural round diamond

This 1.05ct natural round sits in the classic one-carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6505241872. Listed at 13 retailers as of November 5, 2026, with prices from €1,603 to €4,449, a €2,846 spread on the same certified stone. NZ Jewellers lists it at €4,449. 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

1.05
Carat
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 6505241872
Dimensions6.45 × 6.51 × 4.06 mm
L/W Ratio1.01
Girdle conditionSlightly Thick
Top View
6.45 mm6.51 mm1.05 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6505241872
Side View
Table 57.0%Crown 35.5°Girdle: MediumPavilion 41.2°Culet: NoneDepth 62.6%

Caratlytics Score

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

Price History

Last verified: Nov 6
Current: €4,449 EUR|Low: €1,603 EUR|High: €4,651 EUR|Avg: €2,604 EUR|-4.4%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 2€1,603 EUR
Retailer 11€1,704 EUR
Retailer 9€1,922 EUR
Retailer 3€2,011 EUR
Retailer 4€2,036 EUR
Retailer 7€2,237 EUR
Retailer 5€2,253 EUR
Retailer 6€2,508 EUR
Retailer 8€2,597 EUR
Retailer 10€3,718 EUR
NZ Jewellers€4,449 EUR

27 data points across 11 retailers

13 retailers€1,603 EUR to €4,449 EUR

A
Cheapest Retailer
-
€1,603 EUR
A
Retailer 2
-
€1,704 EUR
View
Final sale: no returns
A
Retailer 3
-
€1,922 EUR
View
A
Retailer 4
-
€2,011 EUR
View
A
Retailer 5
-
€2,036 EUR
View
A
Retailer 6
-
€2,075 EUR
View
A
Retailer 7
-
€2,237 EUR
View
A
Retailer 8
-
€2,253 EUR
View
B+
Retailer 9
-
€2,508 EUR
View
B+
Retailer 10
-
€2,597 EUR
View
Retailer 11
-
€2,708 EUR
View
Price last confirmed 31 days ago
B
Retailer 12
-
€3,718 EUR
View
Most Expensive
B
NZ Jewellers
bd109b5e-5f66-43ef-8a97-8f8c565ab457 · Nov 5
€4,449 EUR
$4,967 USD
View
12 more retailers have this diamond
Prices start from €1,603 EURSave up to €2,846 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
1.05ct Round
€1,603 EUR