Page 38 contains a color key which is somewhat useful for indexing later descriptions. The section on Cut stones is in no particular order, and once again the index is needed to find most things quickly. The photos are good and most materials have more than one example. The book covers about 130 varieties of gemstones. No value information is supplied, not even within groups.
Photos contain many labels and comments.
They are easy to look up by name. Mineral physical data is given in column sides, and the text is very good at providing historical information and local information. There is typically one photograph per mineral type, and they are excellent, photo quality and mineral quality. There are also crystal drawings for many of the specimens showing a favorite habit. I believe the book is excellent, and interesting reading, although I would like to see additional sample photos for each species described.