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The search for diamonds
Notes a n d Commenls.
212
[J. F. I.,
b e f o u n d in t h e s t u d y o f t h e d i f f e r e n c e b e t w e e n t h e i n d i r e c t application of pre-generated heat to a solid body or fragm e n t a l m a s s a n d t h e d i r e c t a p p l i c a t i o n of a h e a t g e n e r a t i n g or producing agent to such a body or mass. T h e r e is s o m u c h food for thought and such wonderful results obtainable from the study of apparently so simple a subject, that one marvels t h a t it h a s b e e n h e r e t o f o r e t o t a l l v n e g l e c t e d .
THE SEARCtt
FOR DIAMONDS.
Never before in the history of the United States has there been such a demand for diamonds as there was in 19o5 . Large quantities were imported, but the country produced none. In I9O3 it produced diamonds to the value of $50, in 19Ol it had an output worth $Ioo, in 19oo its production was valued at $I5O, and in 1899 the country boasted native diamonds to the value of $3o0. Diamonds have been discovered in the United States in four different regions, but their actual place of origin is in every ease unknown. All have been found in loose and superficial deposits, and all accidentally. It is not at all improbable, however, that some day the original sources of this queen of gems may be discovered. The high price of diamonds has made the recent search for these precious stones in the United States and Canada keener than ever before. A careful watch for diamonds was kept during the examination 'by the United States Geological Survey of many samples of gold and platinum sands at the Lewis and Clark Exposition in Portland. Ore. A lookout for diamonds has also been kept by a number of persons who have been dredging for gold on an extensive scale in the rivers of California. In neither case have any finds been reported. The occurrence of diamonds in the United States has been treated in some detail by Mr. George F. Kuuz in a report which the Geological Survey will soon publish.
TOURMALINE
AND TOPAZ IN SOUTHERN
CALIFORNIA.
The southern counties of California bid fair to rival the Ural Moun"rains in the production of tourmaline, beryl, topaz, and the other precious stones which have been the pride of that region for the last half century. T h e Palo region in San Diego County has become especially notable in g e m production, and Mr. George F. Kunz, of the United States Geological Survey, calls attention in his forthcoming report on the production of precious stones in I9o5 to the fact that a number of adjacent localities give indication of yielding the same minerals.
212
[J. F. I.,
b e f o u n d in t h e s t u d y o f t h e d i f f e r e n c e b e t w e e n t h e i n d i r e c t application of pre-generated heat to a solid body or fragm e n t a l m a s s a n d t h e d i r e c t a p p l i c a t i o n of a h e a t g e n e r a t i n g or producing agent to such a body or mass. T h e r e is s o m u c h food for thought and such wonderful results obtainable from the study of apparently so simple a subject, that one marvels t h a t it h a s b e e n h e r e t o f o r e t o t a l l v n e g l e c t e d .
THE SEARCtt
FOR DIAMONDS.
Never before in the history of the United States has there been such a demand for diamonds as there was in 19o5 . Large quantities were imported, but the country produced none. In I9O3 it produced diamonds to the value of $50, in 19Ol it had an output worth $Ioo, in 19oo its production was valued at $I5O, and in 1899 the country boasted native diamonds to the value of $3o0. Diamonds have been discovered in the United States in four different regions, but their actual place of origin is in every ease unknown. All have been found in loose and superficial deposits, and all accidentally. It is not at all improbable, however, that some day the original sources of this queen of gems may be discovered. The high price of diamonds has made the recent search for these precious stones in the United States and Canada keener than ever before. A careful watch for diamonds was kept during the examination 'by the United States Geological Survey of many samples of gold and platinum sands at the Lewis and Clark Exposition in Portland. Ore. A lookout for diamonds has also been kept by a number of persons who have been dredging for gold on an extensive scale in the rivers of California. In neither case have any finds been reported. The occurrence of diamonds in the United States has been treated in some detail by Mr. George F. Kuuz in a report which the Geological Survey will soon publish.
TOURMALINE
AND TOPAZ IN SOUTHERN
CALIFORNIA.
The southern counties of California bid fair to rival the Ural Moun"rains in the production of tourmaline, beryl, topaz, and the other precious stones which have been the pride of that region for the last half century. T h e Palo region in San Diego County has become especially notable in g e m production, and Mr. George F. Kunz, of the United States Geological Survey, calls attention in his forthcoming report on the production of precious stones in I9o5 to the fact that a number of adjacent localities give indication of yielding the same minerals.