Excerpt from Precious Stones: A Book of Reference for Jewellers The difference between an Oriental and a quartz cat's-eye is unmistakable after the first introduction: the texture of the Oriental appears finer, the colors softer, the lustre harder. The green of the emerald is not approached by any other stone, though there are some remarkable imitations made. The doublet imitations Of this stone are not good; the color is dark and murky. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.