Valerio Zancanella D.I. -
 
 
 
 
 
 
Valerio Zancanella, owner of the company, has collected his family's experience in the gemological field in Tanzania and published the book: 
 
 
TANZANITE. All about one of the most fascinating gemstones
 
 
The book is available in many gemological institutes around the world but you can also order it here sending an e-mail to: