| Popis: |
The presented publication is intended for future teachers of natural history at primary schools and it is supplementary study material for teaching the basics of geology. In an understandable form, it presents gemology – a science dealing with natural and artificial precious stones. The publication provides basic information about the properties of natural precious stones, their distribution in nature and methods of their processing. It is supplemented with many pictures documenting the beauty of precious stones. The intention is to introduce the issuce to readers who are not involved in geological sciences. |
