Minerals

 

In nature it exists about 3700 mineral species divided into 9 classes

 

Class 1                Elements (metal and intermetallic alloys

                          carbides, metalloids and  non metals)

Class 2                Sulfides and sulphosalts 

Class 3                Halides

Class 4                Oxides, Hydroxides

Class 5                Carbonates, Nitrates

Class 6                Borates

Class 7                Sulfates, Chromates, Molibdates, Wolframates

Class 8                Phosphates, Arseniates, Vanadates

Class 9_1             Silicates - Neso - Soro - Cyclo silicates

Class 9_2             Silicates - Inosilicates

Class 9_3             Silicates - Phyllosilicates

Class 9_4             Silicates - Tectosilicates, Quartz, Chalcedony

Class A                Organic compound

Class M                              Meteorites

 

See details in the single classes

 

On this section we present the postage stamps issued by different states with the effigy of minerals rough or in crystals, meteorites and gems. 
 
Minerals postage stamps 
 
 
 

 

Last modified: Sabato 13 settembre 2014

 

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