I did not realize... Forgive my callous words, <class>.
The mistakes of my ancestors are not what I wish to dwell on, but if your request is truly genuine, then I will help you.
I believe this is the Crystal of Zin-Malor, an artifact that can contain and control strong arcane forces. It could have been used for good, but the evil intentions of those that stole it caused it to shatter.
Go to the Temple of Zin-Malor in Azshara - I can only hope the book is still there.
The pages have gone untouched for many many years...