Completely updated and expanded-covers more geography and 50 percent more tree species than the previous edition Provides a new, easy-to-use illustrated identification key based on the most reliable and non-technical features of each species Features the latest knowledge on the ecology and human history associated with all Northwestern trees. Over 250 exceptionally accurate drawings and historical photos bring these ancient giants to life.

    This book should be of interest to gemologists; gem collectors; jewellers; gem cutters; gem dealers; anyone interested in gemstones.