Discover what precious
stones are, and their proprieties and value
the study of precious
stones, with the scientific knowledge bearing thereon, which his
vocation, the teaching of chemistry and more ...
Dear marketer,
BECAUSE of the rapid increase in knowledge about precious stones on the
part of the buying public, it has become necessary for the gem merchant
and his clerks and salesmen to know at least as much about the subject
of gemology as their better informed customers are likely to know.
In many recent articles in trade papers, attention has been called to
this need, and to the provision which Columbia University has made for
a course in the study of gems. The action of the National Association
of Goldsmiths of Great Britain in providing annual examinations in
gemology, and in granting certificates and diplomas to those who
successfully pass the examinations, has also been reported, and it has
been suggested that some such[vi] course should be pursued by jewelers'
associations in this country. The greatest difficulty in the way of
such formal study among our jewelers and gem merchants is the lack of
time for attendance on formal courses, which must necessarily be given
at definite times and in definite places.
As a diamond salesman was heard to say recently: "The boss said he
wanted me to take in that course at Columbia, but he didn't tell me how
I was going to do it. Here I am a thousand miles from Columbia, and it
was only six weeks ago that he was telling me I ought to take that
course. I can't stay around New York all the time." Similarly those
whose work keeps them in New York might object that their hours of
employment prevented attendance on day courses, and that distance from
the university and fatigue prevent attendance on night courses. The
great mass of gem dealers in other cities must also be considered.[vii]
It will therefore be the endeavor of this book to provide guidance for
those who really want to make themselves more efficient in the gem
business, but who have felt that they needed something in the way of
suggestion regarding what to attempt, and how to go about it.
Study of the sort that will be suggested can be pursued in spare
moments, on street cars or elevated trains, in waiting rooms, or in
one's room at night. It will astonish many to find how much can be
accomplished by consistently utilizing spare moments. Booker T.
Washington is said to have written in such spare time practically all
that he has published.
For the practical study of the gems themselves, which is an absolutely
essential part of the work, those actually engaged in the trade have
better opportunities than any school could give and, except during rush
seasons, there is plenty of time during business hours for such study.
No intelligent employer will begrudge such use of time for which he is
paying, if the[viii] thing be done in reason and with a serious view to
improvement. The frequent application of what is acquired, as
opportunity offers, in connection with ordinary salesmanship, will help
fix the subject and at the same time increase sales.
Many gem dealers have been deterred from beginning a study of gems
because of the seeming difficulties in connection with the scientific
determination of the different varieties of stones. Now science is
nothing but boiled-down common sense, and a bold front will soon
convince one that most of the difficulties are more apparent than real.
Such minor difficulties as exist will be approached in such a manner
that a little effort will overcome them. For those who are willing to
do more work, this book will suggest definite portions of particular
books, which are easily available, for reference reading and study—but
the lessons themselves will attempt to teach the essential things in as
simple a manner as is possible.[ix]
Perhaps the first essential for the gem merchant is to be able surely
to distinguish the various stones from one another and from synthetic
and imitation stones.
That such ability is much needed will be clear to anyone who in casting
a backward glance over his experience recalls the many serious mistakes
that have come to his knowledge. Many more have doubtless occurred
without detection. Several times recently the author has come across
cases where large dealers have been mistaken in their determination of
colored stones, particularly emeralds. Only the other day a ring was
brought to me that had been bought for a genuine emerald ring after the
buyer had taken it to one of the dealers in his city and had paid for
an examination of it, which had resulted in its being declared genuine.
On examining the stone with a lens of only moderate power, several
round air bubbles were noted in it, and on barely touching it with a
file it was easily scratched.[x]
The material was green glass. Now,
what was said about the dealer who sold it and the one who appraised it
may be imagined. The long chain of adverse influence which will be put
in action against those dealers, even though the one who sold the stone
makes good the loss, is something that can be ill afforded by any
dealer, and all this might have been avoided by even a rudimentary
knowledge of the means of distinguishing precious stones. The dealer
was doubtless honest, but, through carelessness or ignorance, was
himself deceived.
Introduction to ...
Precious stones
In this book you will
learn:
- How stones are distinguished from one to another
- Refraction
- Double refraction
- Specific gravity
- Dispersion
- Color
- How to test stones
And more ...
Act
today, if you are interested in precious stones!
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