Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Must have for your mineral library

This is a must have for any mineral lover's library. It is very informative and provides a great deal of the metaphysical properties of minerals. I rated it a 4 because you have to purchase the supplements in order to see pictures of the actual stones. I would recommend this book and the supplements; but, I would also recommend getting the Crystal Bible, by Judy Hall as an addition.