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The Chemistry, Properties and Tests of Precious Stones   By: (1865-)

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First Page:

THE CHEMISTRY,

PROPERTIES AND TESTS OF

PRECIOUS STONES

BY THE SAME AUTHOR

THE STOLEN PLANET. (2nd edition.) 3s. 6d.

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THIS WORKADAY WORLD. (In the Press.)

HENRY J. DRANE.

PEPPER'S BOY'S PLAYBOOK OF SCIENCE.

(New edition.) Now in Press, revised, re written and re illustrated by DR. JOHN MASTIN.

GEORGE ROUTLEDGE AND SONS, LTD.

ETC. ETC.

THE CHEMISTRY, PROPERTIES

AND TESTS

OF

PRECIOUS STONES.

BY

JOHN MASTIN, M.A. D.SC. PH.D. LITT.D.

F.S A.SCOT. F.L.S. F.C.S. F.R.A.S. F.R.M.S. R.B.A.

Author of "Parasites of Insects," "The True Analysis of Milk," "Plate Culture and Staining of Amoebæ," etc., etc.

London

E. & F. N. SPON, LIMITED, 57 HAYMARKET

NEW YORK

SPON & CHAMBERLAIN, 123 LIBERTY STREET

1911

Transcriber's note:

For Text: A word surrounded by a cedilla such as ~this~ signifies that the word is bolded in the text. A word surrounded by underscores like this signifies the word is italics in the text. The italic and bold markup for single italized letters or "foreign" abbreviations are deleted for easier reading.

For numbers and equations: Parentheses have been added to clarify fractions. Underscores before bracketed numbers in equations denote a subscript.

CONTENTS

CHAPTER PAGE

I INTRODUCTORY 1

II THE ORIGIN OF PRECIOUS STONES 7

III PHYSICAL PROPERTIES (A) CRYSTALLINE STRUCTURE 13

IV " " (B) CLEAVAGE 19

V " " (C) LIGHT 26

VI " " (D) COLOUR 32

VII " " (E) HARDNESS 39

VIII " " (F) SPECIFIC GRAVITY 45

IX " " (G) HEAT 52

X " " (H) MAGNETIC AND ELECTRIC INFLUENCES 57

XI THE CUTTING OF PRECIOUS STONES 62

XII IMITATIONS, AND SOME OF THE TESTS OF PRECIOUS STONES 70

XIII VARIOUS PRECIOUS STONES 80

XIV " " " ( continued ) 88

XV " " " " 98

PREFACE

Some little time ago certain London diamond merchants and wholesale dealers in precious stones made the suggestion to me to write a work 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 book 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.

JOHN MASTIN.

TOTLEY BROOK, NEAR SHEFFIELD.

June 1911.

THE CHEMISTRY, PROPERTIES AND TESTS OF PRECIOUS STONES

CHAPTER I.

INTRODUCTORY.

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... Continue reading book >>




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