Cheers Jaros.
Thanks for the info Dron. I think I've got a lot of research to do.
As for favorite stones it would be nice to find some
Sapphires
Ruby's
Emeralds
Diamonds
Opal
Zircons
Topaz
Garnets
Quartz's
Peridot
Plus lots of mineral specimens
Is there anything I've forgotten?
But...