THE CHEMISTRY,

PROPERTIES AND TESTS OF

PRECIOUS STONES

BY THE SAME AUTHOR

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

THROUGH THE SUN IN AN AIRSHIP. 6s.

THE IMMORTAL LIGHT. (2nd edition.) 6s.

C. Griffin and Co., Ltd.

THE AUTOBIOGRAPHY OF A PICTURE.
(2nd edition.) 3s. 6d.

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 Amœbæ," etc., etc.

London

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

NEW YORK

SPON & CHAMBERLAIN, 123 LIBERTY STREET

1911

CONTENTS