I bought this book in conjunction with the "Practical Guide to Care stones" Reynald Boschiero. For 15 so I had the equivalent of a true dictionary lithotherapy. Sure, alone, this book is very amber. But do not forget that this is his nut: visually present us the maximum in minimum stones page. So I associated with the other guide for further use, once back home. But this little book can save valuable time those who "vadrouillent" in search of the stone they have spotted in a manual. Some short but useful indication is given for each stone such as its properties (physical, spiritual, ...), rarity, etc ... In short, a small book that fulfills its functions and whose purchase satisfies me!