Say you are spending time on your desk, you have a couple crystals on your desk close to you. For sure their energy still blends with yours and yadda yadda. However do you think that simply picking up on in your hand while you still think of your things, is 'doing something' ? I do not even care that much to ask this but the thought reoccur to me many times as a matter of fact.
Even if a sphere is next to my hand while my hand is on the mouse of the laptop, then just grabbing that sphere in my hand, sometimes I feel a more immediate amplification of that said crystal, but it isn't something I could put into words.
Crystals energy are subtle, but they certainly are and in many cases they can have highly powerful effects but in their subtleties most people will never give them credit, which is fine.
You can think of variations around this topic and feel free to express your thoughts and subjective opinions (or objective opinions if they exist)