Bøger af John Mastin

The Chemistry, Properties and Tests of Precious Stones is a classic geology text by John Mastin. Some little time ago certain London diamond merchants and wholesale dealers in precious stones made the suggestion to me to write a precious gem study on this section of mineralogy, as there did not appear to be any giving exactly the information most needed. Finding there was a call for such a mineral guide I have written the present volume in order to meet this want, and I trust that this handbook will prove useful, not only to the expert and to those requiring certain technical information, but also to the general public, whose interest in this entrancing subject may be simply that of pleasure in the purchase, possession, or collection of precious stones, or even in the mere examination of them through the plate-glass of a jeweller's window.

"The Chemistry, Properties, and Tests of Precious Stones" is a book written by John Mastin, a British chemist, and mineralogist. The book is a comprehensive guide to the science of gemstones, including their chemical composition, physical properties, and methods for testing their authenticity. Mastin begins by discussing the chemical and mineralogical properties of precious stones, including diamonds, rubies, emeralds, and sapphires. Do you want to dive into the knowledge of Gemstones and Gemology? This book also includes detailed instructions for testing the authenticity of gemstones, including methods for distinguishing natural stones from synthetic or imitation ones. This collection of ideas by Sir Mastin remains a valuable resource for gemologists, jewelers, and anyone interested in the study and appreciation of these beautiful and valuable objects. Mastin provides a wealth of information on the methods used to cut and polish gemstones, as well as the various settings and mountings used in jewelry.

The Chemistry, Properties and Tests of Precious Stones , is many of the old books which have been considered important throughout the human history. They are now extremely scarce and very expensive antique. So that this work is never forgotten we republish these books in high quality, using the original text and artwork so that they can be preserved for the present and future generations. This whole book has been reformatted, retyped and designed. These books are not made of scanned copies of their original work and hence the text is clear and readable.

"What constitutes a precious stone is the question which, at the onset, rises in the mind, and this question, simple as it seems, is one by no means easy to answer, since what may be considered precious at one time, may cease to be so at another.There are, however, certain minerals which possess distinctive features in their qualities of hardness, colour, transparency, refractability or double refractability to light-beams, which qualities place them in an entirely different class to the minerals of a metallic nature. These particular and non-metallic minerals, therefore, because of their comparative rarity, rise pre-eminently above other minerals, and become actually "precious.""