Identifying Gem Stones – Step 1:
First, try to make sure that, the gemstone that you have, is a gem stone. Some times what you think may be a gem stone is just a pretty rock or a piece of metallic ore.
Since the term gem stone is largely arbitrary, this can be hard. Some basic guidelines include:
If it's rough and sandy, it should not be identified as a gem stone, no matter how pretty it may be.
If it's malleable, that is easily able to be shaped by hammering, crushing or bending; it is probably a metallic ore. Gem stones are primarily identified by a crystalline structure, which can be shaped, but not easily shaped and then only by cutting, fracturing or abrasion.
A pearl, though used in jewelry, is not considered a gem stone. (Though if you want to identify it as a gem stone, go ahead. I won't tell anyone.)
It is tempting to identify fossilized wood as a gem stone because of its shiny, lustrous surface and its attractive lines and colors, but it is not considered a gem
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