Stamp: Boulder Opal, Opalton, Qld. (Australia 2025)
Boulder Opal, Opalton, Qld. (Australia 2025)
17 July (Australia ) within release Australian Opals (2025) goes into circulation Stamp Boulder Opal, Opalton, Qld. face value 1.70 Australian dollar
| Stamp Boulder Opal, Opalton, Qld. in catalogues | |
|---|---|
| Colnect codes: | Col: AU 2025.07.17-01 |
Stamp is square format.
Also in the issue Australian Opals (2025):
- Stamp - Boulder Opal, Opalton, Qld. face value 1.70;
- Stamp - Boulder Opal, Opalton, Qld. face value 1.70;
- Se-tenant - Domestic Post - Australian Opals - strip of 2 face value 3.40;
- Stamp - Light Opal, Coober Pedy S.A. face value 3.40;
- Souvenir Sheet - Opals Minisheet, Domestic Mail face value 6.80;
- Stamp - Pineapple Opal, White Cliffs, NSW face value 1.70;
- Stamp - Pineapple Opal, White Cliffs, NSW face value 1.70;
- Booklet - Pineapple Opal, White Cliffs, NSW face value 10*1.70;
- Stamp - Pineapple Opal, White Cliffs, NSW face value 1.70;
Stamp Boulder Opal, Opalton, Qld. 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
