The chemistry, properties and tests of precious stones
What constitutes a precious stone is the question, which at the onset, rises in the mind, and this question, simple as it seems, is one by no means easy to answer, since what may be considered precious at one time, may cease to be so at another. There are, however, certain minerals, which possess di...
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| Format: | EBOOK |
| Language: | ENGLISH |
| Published: |
Good Press
2019
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