Minerály
- 93pages
- 4 heures de lecture
Drahokamy a krystaly včetně Krystalové soustavy a stupnice tvrdosti.
Rainer Bode Livres
Mineralien Museen in Westeuropa
- 269pages
- 10 heures de lecture
Welcher Edelstein ist das?
- 128pages
- 5 heures de lecture
Mineralien
- 93pages
- 4 heures de lecture
Mineralien. Edelsteine und Kristalle. Extra
Kristallsystem und Härteschlüssel
- 93pages
- 4 heures de lecture
Photos and information on form, color, origin, and other topics for many specific minerals, gems and crystals. Additional information on mineral formation in the earth.