The Chemistry, Properties and Tests of Precious Stones

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Author: John Mastin
Published: 1911
Language: English
Wordcount: 27,407 / 93 pg
Flesch-Kincaid Reading Ease: 30.4
LoC Category: QD
Downloads: 1,787
Added to site: 2007.11.30
mnybks.net#: 19171
Origin: gutenberg.org
Genre: Instructional

Some little time ago certain London diamond merchants and wholesale dealers in precious stones made the suggestion to me to write a work on this section of mineralogy, as there did not appear to be any giving exactly the information most needed.

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the same salt-charged aqueous solution which undergoes change in and on ironstone would result in an entirely different product from that resting on or embedded in silica.

Following out the explanation of the aqueous solution, in which the earth-crust constituents are secreted, we find that the rarer and more precious metals do not generally enter into the composition of precious stones--which fact may advisedly be repeated. It is, of course, to be expected that beryllium will be found in the emerald, since it is under the species beryl, and zirconium in zircon; but such instances are the exception, and we may well wonder at the actions of the infinite powers of nature, when we reflect that the rarest, costliest and most beautiful of all precious stones are the simplest in their constituents.

Thus we find the diamond standing unique amongst all gems in being composed of one element only--carbon--being pure crystallised carbon; a different form from graphite, it is true, but, nevertheless, pure

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