American Mineralogist

Volume 18, Issue no. 04 : April 1933

REGULAR ARTICLE

133 The use of a refractometer with variable refracting angle

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148 Gems and gem minerals of North Carolina

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160 Microscopic minerals of the clays of Middlesex County, New Jersey

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167 Zeolitic alteration of pyroclastics

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NEW MINERAL NAMES

179 New mineral names

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BOOK REVIEW, PROCEEDINGS and NEW MINERAL NAMES

176 Book review; Proceedings of societies; New mineral names

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NOTES

172 Note on the structure of carbonado or black diamond

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174 Note on the alteration of galena to anglesite to cerussite

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TABLE OF CONTENTS
&
SPECIAL COLLECTIONS

Table of Contents

AmMin submission to acceptance/”first publication” is at a record average of about three to four months. Our acceptance to “final” publication is presently another 13 months on average.

Special Collections

American Mineralogist is an international journal that publishes mineralogical papers of broad interest to the geoscience and materials science community.