Chapter I: Front Matter

THE CHEMISTRY,

PROPERTIES AND TESTS OF

PRECIOUS STONES

* * * * *

BY THE SAME AUTHOR

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* * * * *

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 Amoebae," 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