Stamp: Mineral: Barite (Angola 1970)

Mineral: Barite (Angola 1970)

31 October (Angola ) within release Geology, mineralogy, paleontology goes into circulation Stamp Mineral: Barite face value 5 Angolan escudo

Stamp Mineral: Barite in catalogues
Michel: Mi:AO 572

Stamp is square format.

Also in the issue Geology, mineralogy, paleontology:

Data entry completed
90%
Stamp Mineral: Barite in digits
Country: Angola
Date: 1970-10-31
Print: Offset and Lithography
Size: 30 x 30
Perforation: comb 13½
Emission: Definitive
Format: Stamp
Face Value: 5 Angolan escudo

Stamp Mineral: Barite it reflects the thematic directions:

In geology and mineralogy, a mineral or mineral species is, broadly speaking, a solid substance with a fairly well-defined chemical composition and a specific crystal structure that occurs naturally in pure form

Stamp, Mineral: Barite, Angola,  , Minerals