Natural Gemstones
by Geological Survey (U.S.)
This edition had all images removed.
Title:
Natural Gemstones
Credits:
Produced by Stephen Hutcheson, Dave Morgan, Carol Spearsand the Online Distributed Proofreading Team athttp://www.pgdp.net
Summary:
"Natural Gemstones" by Geological Survey is a scientific publication likely written in the late 20th century. The book provides an overview of natural gemstones, discussing their classification as precious or semiprecious, as well as the geologic environments in which they form. It serves...