Burkina Faso
Scott 906
280 CFA francs
4 Feb 1991
| Rock Name: | Amphibolite |
| Composition: | A rock chiefly composed of minerals of the Amphibole group. The amphiboles are a complex group of silicate minerals that contain one or more of: calcium, potassium, sodium, lead, iron, lithium, magnesium, manganese, aluminum, chromium, titanium, and beryllium. |
| Nomenclature: | Named after the Greek word amphibolos, which means "ambiguous" because the minerals are easily mistaken for other minerals. |
| Industrial Uses: | Crushed stone, building material. |
| Additional Notes: | Amphibolite is a recrystallized metamorphic rock that consists mostly of amphibole and plagioclase feldspar, and little or no quartz. |
|
|
|
|
Amphibolite Burkina Faso Scott 906 280 CFA francs 4 Feb 1991 |
|
|
|
|
| The stamp shows native rock as a natural, unpolished outcrop. | |
| http://mineralstamps.rbnet.net/amphibolite.htm | Philatelic Mineralogy | Copyright © 1997-2010 by Richard Busch |