in
August. There was a slight increase in the output of turquoise and
turquoise matrix, probably to meet the increased demand for souvenir
gems in the western tourist trade. The table of production represents
only an approximation of the output of gems in the United States. For
many gems the values given in 1914 and in previous years have been
estimated from figures showing the quantity produced. That is, the
tables give as nearly as possible the first values of the rough
minerals. The value of the finished gems is several times greater. The
preparation of complete statistics of production of precious stones is
practically impossible, owing to the attitude assumed by some of the
gem miners and dealers, who hesitate to furnish statements of
production. The assistance of those who have kindly furnished such
figures is greatly appreciated, and it is hoped that those who have not
cooperated in this way in the past will do so in the future, on
realizing that statistical information furnished by them will be held
confidential.
Under
miscellaneous gems in the table of production for 1914 are included
obsidian, beach pebbles, fossil coral, apatite, kyanite, and Iceland
spar. During other years datolite, natrolite, pectolite, apophyllite,
iolite, chondrodite, and various gem minerals with trade names have
been included.
