The column on the technical information is not suspended, unfortunately commitments always lead to different directions, but I will keep much to this meeting today and then you do 'a little advance an argument which I will soon, the various treatments that suffer from the stones.
Since I started making jewelry I also became interested in the wide world of precious stones or semiprecious stones. My knowledge is superficial and is limited mostly to the stones that I use most, of which I try to always know as much as possible. It often happens that the vendors give you the information very sketchy, and often wrong, so you always have to look further and create a personal knowledge base with which to evaluate, but also any "sun" that we can trim. Personally I do not choose the stones according to the degree of perfection, indeed, usually are more fascinated by the imperfections, I am struck by a color or a blend of colors as the stones mounted in these earrings, vendutemi for sodalite (!) but in fact something quite different (lapidalite, discovered over the network! ).
Most of the stones that are easily found on the market (most are low in cost than the probability is high) undergo treatments. Many are reconstructed into a paste, irradiated, colored. A good example to understand what we're talking about is the turquoise.
In these interesting pages provided by FireMountain Gems you can get an idea of \u200b\u200bwhat to buy when you sell the "Turquoise".
Properties turquoise
Buying Guide turquoise
Plus this very complete view of one of the most important components of American companies for jewelry, which has an honesty about what is flag, even at the cost of losing customers:
Turquoise from Rings & Things
Other resources on the stones:
Chart on Softflex
International Gem Society
Index of precious stones from Rings & Things
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