GZplus0518_Gesamt_ohneRuecken_ENG
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Valuation<br />
Criteria<br />
Photos: Lens n Roses Photographie<br />
a) Coloured gemstones<br />
1. Weight and measurements of the<br />
object<br />
2. Gemmological testing (stone type,<br />
authenticity)<br />
3. Establishing and assessing the colour<br />
intensity = depth of colour and<br />
luminosity<br />
4. Determining the relative purity and<br />
brilliance<br />
5. Proportions and cut<br />
b) Diamonds<br />
1. Weight and measurements of the<br />
object<br />
2. Gemmological testing<br />
3. Identifying the colour level based on a<br />
standardised reference table<br />
4. Determining the purity level (microscope<br />
and magnifying glass)<br />
5. Determining the quality of the cut and<br />
proportions using a proportion scope<br />
c) Precious metals<br />
1. Identifying the alloy<br />
2. Evaluating the processing, technique<br />
and design<br />
3. Labour input<br />
Valuation: The facts outlined in sections<br />
a, b and c form the basis for the price<br />
provided, while also taking account of the<br />
current market situation (supply and<br />
demand), rarity of the gemstone and<br />
specific features of the object.<br />
GZ plus 05/18 059
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