Instruct: Classify the given review as either positive or negative.
Query: Jade: 5000 B.C. to 1912 A.D., a Guide for Collectors

I found Veleanu's well organized, well written book to be an invaluable tool for identifying Chinese jades. Each period/dynasty has its own chapter with an abundance of photos. There are also chapters on ornamental jade, coinage and seals, Buddhist carvings, and funerary jade. "Part I: Overview" is a must read.