Zucker, Benjamin, HOW TO INVEST IN GEMS, Dorset (UK): Blandford Press, 1977, pp128 (text), pp16 (color plates). Dustjacket. Nice used.
This used book was bought from Romie some ten years ago when he was then running Sultana Bookstore at Selegie Road. It is out-of-print and hard to find.
This interesting book is a layman's guide to the connoisseur's world of rubies, sapphires, emeralds, diamonds, and other precious gemstones.