Hello Everyone,
I am new to this forum, let me ask if we can share experience on gems?
The stone for me is Lapis Lazuli / Sodalite, same family specially for the greasy aspect.
You can use a drop of “Nitric Acid” to check it, if the drop disolve the spot, you know it is Sodalite.
But, if you get a foul odor consider it as Lapis Lazuli.
Good Luck
Antonio
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