You are bidding on a used soft cover book called THE NATIONAL GEM COLLECTION : Smithsonian Institution  , ISBN-10: 0810927586 by Jeffrey E. Post. This is 10" x 10" with 144 pages from 1997 . The Smithsonian Institution's National Museum of Natural History holds the world's greatest collection of gems. In this beautiful book, Dr. Jeffrey E. Post, curator of the National Gem and Mineral Collection, discusses everything from diamonds, rubies, and emeralds to jade and lapis lazuli, as well as the Hope Diamond and other world-famous stones in the museum's collection.  More than 100 stunning photographs capture the colors and brilliance of these wonders of the mineral kingdom .  This is in very good condition but the front cover has a 1/2" bend bottom corner .