Precious Stones

Precious Stones
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Learn how to distinguish precious stones from one another and their properties. The author also discuses refraction, color luster and other reflection effects. Learn all you need to know about precious stones.

In this eBook the author has tried to combine the trade information which he has gained in his avocation, the study of precious stones, with the scientific knowledge bearing thereon, which his vocation, the teaching of chemistry, has compelled him to master...