Publisher's Synopsis
Excerpt from Trait� des Caract�res Physiques des Pierres Pr�cieuses, pour Servir A Leur D�termination Lorsqu'elles Ont �t� Taill�es
Bergmann qui avait analys� ces di vers�s substances, penchmt m�me vers l'op1n10n qu'elles avaient un fond com m un et �taient produites par l'union de'l'alumme comme partie dominante, avec la silice et la chaux en sorte que les diff�rences qui distinguaient les gemmes les unes des autres, d�pendaient des divers rapports entre les quantit�s de ces trois pr1nc1pes. 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.