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. CONTENTS I.-HOW STONES ARE DISTINGUISHED FROM ONE ANOTHER II.-REFRACTION III.-DOUBLE REFRACTION IV.-ABSORPTION AND DICHROISM V.-SPECIFIC GRAVITY VI.-SPECIFIC GRAVITY DETERMINATIONS VII.-LUSTER AND OTHER REFLECTION EFFECTS VIII.-HARDNESS IX.-HARDNESS (Continued) X.-DISPERSION XI.-COLOR XII.-COLOR (Continued) XIII.-COLOR (Continued) XIV.-COLOR (Concluded) [xii]XV.-HOW TO TELL SCIENTIFIC STONES FROM NATURAL GEMS XVI.-HOW TO TEST AN "UNKNOWN" GEM XVII.-SUITABILITY OF STONES FOR VARIOUS TYPES OF JEWELS, AS DETERMINED BY HARDNESS, BRITTLENESS, AND CLEAVABILITY XVIII.-MINERAL SPECIES TO WHICH THE VARIOUS GEMS BELONG AND THE CHEMICAL COMPOSITION THEREOF XIX.-THE NAMING OF PRECIOUS STONES XX.-THE NAMING OF PRECIOUS STONES (Concluded) XXI.-WHERE PRECIOUS STONES ARE FOUND XXII.-HOW ROUGH PRECIOUS STONES ARE CUT XXIII.-HOW ROUGH PRECIOUS STONES ARE CUT AND WHAT CONSTITUTES GOOD "MAKE" (Concluded) [xiii]XXIV.-FORMS GIVEN TO PRECIOUS STONES XXV.-IMITATIONS OF PRECIOUS STONES XXVI.-ALTERATION OF THE COLOR OF PRECIOUS STONES XXVII.-PEARLS XXVIII.- CULTURED PEARLS AND IMITATIONS OF PEARLS XXIX.-THE USE OF BALANCES AND THE UNIT OF WEIGHT IN USE FOR PRECIOUS STONES XXX.- TARIFF LAWS ON PRECIOUS AND IMITATION STONES BIBLIOGRAPHY INDEX The product will be sent by email/download within 48 hrs from receipt of your order. Please, whitelist the following e-mail: elli26@yahoo.com.
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Precious Stones (For Jewelers and the Gem-Loving Public)

Precious Stones (For Jewelers and the Gem-Loving Public)

$7.99

You save 50% off the regular price of $15.99

Description

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.

CONTENTS

I.-HOW STONES ARE DISTINGUISHED FROM ONE ANOTHER
II.-REFRACTION
III.-DOUBLE REFRACTION
IV.-ABSORPTION AND DICHROISM
V.-SPECIFIC GRAVITY
VI.-SPECIFIC GRAVITY DETERMINATIONS
VII.-LUSTER AND OTHER REFLECTION EFFECTS
VIII.-HARDNESS
IX.-HARDNESS (Continued)
X.-DISPERSION
XI.-COLOR
XII.-COLOR (Continued)
XIII.-COLOR (Continued)
XIV.-COLOR (Concluded)
[xii]XV.-HOW TO TELL SCIENTIFIC STONES FROM NATURAL GEMS
XVI.-HOW TO TEST AN "UNKNOWN" GEM
XVII.-SUITABILITY OF STONES FOR VARIOUS TYPES OF JEWELS, AS DETERMINED BY HARDNESS, BRITTLENESS, AND CLEAVABILITY
XVIII.-MINERAL SPECIES TO WHICH THE VARIOUS GEMS BELONG AND THE CHEMICAL COMPOSITION THEREOF
XIX.-THE NAMING OF PRECIOUS STONES
XX.-THE NAMING OF PRECIOUS STONES (Concluded)
XXI.-WHERE PRECIOUS STONES ARE FOUND
XXII.-HOW ROUGH PRECIOUS STONES ARE CUT
XXIII.-HOW ROUGH PRECIOUS STONES ARE CUT AND WHAT CONSTITUTES GOOD "MAKE" (Concluded)
[xiii]XXIV.-FORMS GIVEN TO PRECIOUS STONES
XXV.-IMITATIONS OF PRECIOUS STONES
XXVI.-ALTERATION OF THE COLOR OF PRECIOUS STONES
XXVII.-PEARLS
XXVIII.- CULTURED PEARLS AND IMITATIONS OF PEARLS
XXIX.-THE USE OF BALANCES AND THE UNIT OF WEIGHT IN USE FOR PRECIOUS STONES
XXX.- TARIFF LAWS ON PRECIOUS AND IMITATION STONES
BIBLIOGRAPHY
INDEX

The product will be sent by email/download within 48 hrs from receipt of your order. Please, whitelist the following e-mail: elli26@yahoo.com.

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