Excerpt from A Treatise on Diamonds and Pearls, in Which Their Importance Is Considered: And Plain Rules Are Exhibited for Ascertaining the Value of Both; And the True Method of Manufacturing Diamonds It contains rational and plain rules for efiimating the value of Diamonds and Pearls under all circumfiances, and for manufac turing Diamonds to the greatel'c perfection Both which have hitherto been but very imper-z feetly underflood. From hence. 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.