Hello,
Yes, they sell a lot of "precious" stones over here. I haven't fallen for that....but many do. On the other hand.....if you buy them because they are pretty and interesting.....that's another story.
Please tell your son in law thanks for his service. I did many years on active duty but never made it over here. Now that I'm a civilian working for the Army....I find myself here! LOL
Best wishes to you.....and happy prepping!!