Stamp: Orapa diamond mine and diamonds (Botswana 1970)
Orapa diamond mine and diamonds (Botswana 1970)
23 March (Botswana ) within release Botswana development program goes into circulation Stamp Orapa diamond mine and diamonds face value 35 Botswana cent
| Stamp Orapa diamond mine and diamonds in catalogues | |
|---|---|
| Michel: | Mi:BW 61 |
| Stamp Number: | Sn:BW 61 |
Stamp is square format.
Also in the issue Botswana development program:
- Stamp - Diamond treatement plant face value 3;
- Stamp - Copper and nickel mining face value 7;
- Stamp - Copper and nickel mining face value 10;
- Stamp - Orapa diamond mine and diamonds face value 35;
|
Data entry completed
46%
|
|
|---|---|
| Stamp Orapa diamond mine and diamonds in digits | |
| Country: | Botswana |
| Date: | 1970-03-23 |
| Perforation: | 14½ x 14 |
| Format: | Stamp |
| Face Value: | 35 Botswana cent |
Stamp Orapa diamond mine and diamonds it reflects the thematic directions:
A gemstone (also called a fine gem, jewel, precious stone, semiprecious stone, or simply gem) is a piece of mineral crystal which, when cut or polished, is used to make jewelry or other adornments. Certain rocks (such as lapis lazuli, opal, and obsidian) and occasionally organic materials that are not minerals (such as amber, jet, and pearl) may also be used for jewelry and are therefore often considered to be gemstones as well.Most gemstones are hard, but some softer minerals such as brazilianite may be used in jewelry because of their color or luster or other physical properties that have aesthetic value. However, generally speaking, soft minerals are not typically used as gemstones by virtue of their brittleness and lack of durability
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
