Namibia
Scott 685
65 cents
2 Jan 1991
along with its name and chemical formula.
| Mineral Name: | Boltwoodite |
| Composition: | Hydrated potassium uranyl silicate hydroxide |
| Nomenclature: | Named after the American chemist Bertram Borden Boltwood who, in 1907, developed the process of radioactive dating. |
| Industrial Uses: | Uranium ore (minor), scientific study. |
| Additional Notes: | Strongly radioactive. |
|
|
|
|
Boltwoodite Namibia Scott 685 65 cents 2 Jan 1991 |
|
|
|
|
|
The stamp shows a natural, unpolished mineral specimen along with its name and chemical formula. |
|
| http://stampmin.home.att.net/boltwoodite.htm | Philatelic Mineralogy | Copyright © 1997-2008 by Richard Busch |