Priestess,
Namaste.
12 hours? And I thought 30 seconds was tough. :-}}
My experience with crystals is relatively limited - However, sometimes I am asked to check out a crystal, stone, etc before it is "adopted".
To my knowledge, and in my experience, only citrine (and another which I cannot think of right now) does not "store" or "collect" energy - therefore needs no cleansing.
All others need work before adopting or after use - in my estimation.
Obsidian is so wonderful for extraction work. I agree - if you have used it for yourself it will feel "different" vibrationally if it is used by another - obsidian balls seem that "sensitive" - not to be anthropomorphic, or anything like that.
:-}}
I never lend mine.
reiki all around,
all blessings,
firekeeper
