Kate Pavitt & William Thomas 
The Book of Talismans Amulets and Zodiacal Gems [EPUB ebook] 
A study about symbolism of precious stones and how they have been used through the ages

Symbolism of precious stones study. How they have been used as magical objects through the ages, both intrinsically, and as a vehicle for symbolic engravings. The book covers Hindu, Jewish, Chinese, Egyptian, Roman, Gnostic, and Christian lore of gems.

The final section discusses the astrological connections of key gems, sign by sign. Anyone interested in the symbolism of gemstones will find this a great reference and a fascinating read.