Australia
Scott 558
6 cents
11 Jul 1973
and a polished gemstone.
| Mineral Name: | Chrysoprase |
| Composition: | Silicon oxide |
| Nomenclature: | Named after the Greek words chrysos and prason which means "gold" and "a leek" respectively because of its color. |
| Industrial Uses: | Gemstone. |
| Additional Notes: | Chrysoprase is a variety of chalcedony that is impregnated with nickel compounds to produce a bright yellow-green color. Chalcedony is a cryptocrystalline (crystals of sub-microscopic size) variety of quartz with a somewhat waxy appearance. |
|
|
|
|
Chrysoprase (Quartz - Chalcedony) Australia Scott 558 6 cents 11 Jul 1973 |
|
|
|
|
|
The stamp shows a natural, unpolished specimen and a polished gemstone. |
|
| http://mineralstamps.rbnet.net/chrysoprase.htm | Philatelic Mineralogy | Copyright © 1997-2010 by Richard Busch |