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Mineralogy:
Properties of Gold Minerals
Gold is susceptible of existing in the diverse geologic surroundings but its weak chemical reactivity makes it become present in the nature under a small number of mineralogical forms.
- Mineral: Natural gold
- Composition: Au
- Gold content: › 75
- Density: 16 - 19
- Time period: 2,5 – 3
- Mineral: Electrum
- Composition: (Au, Ag)
- Gold content: 45 – 75
- Density: 13 – 16
- Time period: 2 – 2,5
- Mineral: Calaverite or gold telluride
- Composition: Au Te2
- Gold content: 40
- Density: 9,2
- Time period: 2,5 – 3
- Mineral: Krennerite
- Composition: Au4 Au Te10
- Gold content: 31 – 44
- Density: 8,6
- Time period: 2,5
- Mineral: Sylvanite
- Composition: Au Ag Te4
- Gold content: 24 – 30
- Density: 8,2
- Time period: 1,5 – 2
- Mineral: Petzite
- Composition: Ag3 Au Te2
- Gold content: 19 – 25
- Density: 9,1
- Time period: 2,5
- Mineral: Hessite
- Composition: Ag2 Te
- Gold content: < - 5
- Density: 8,4
- Time period: 2,5 – 3
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