Gemstones
- 176 páginas
- 7 horas de lectura
Describes the history of the mining and uses of precious stones and discusses scientific research into the formation and properties of gems.
Paul O´Neil Libros
Die Flußdampfer
- 240 páginas
- 9 horas de lectura
Describes the history of the mining and uses of precious stones and discusses scientific research into the formation and properties of gems.