Stones? Options

So I've been experimenting with giving energy to stones, charging them, etc. I saw a post on here about "vampiric stones," which is just another word for a stone that can take in energy. However, it came to my intention later that day that it might, in fact, be possible to make an actual "vampiric stone," one which absorbs the energy of things it touches (except, obviously, your own - you would have to sync it with your energy) and stores it. No, I don't mean living things that are trying to put energy into it, I mean if you touched it to a weed in your garden it would steal the energy, which you could then absorb. Needless to say, this would be an experimental and hazardous technique, but I was thinking - if you're going to weed your garden, why wouldn't you want to get something out of it? You would get the plant's energy and the dead plant would become fertilizer. It's probably possible to do this without a stone, but I was wondering if it could be done - I've tried just removing the energyfrom stones and making them basically black holes that absorb energy, but the energy from the elements always fills it right back up. Anyone have any ideas?

oh yeah, energized matter, crystal or not, is a particle accelerator - in the case of a crystal, or water, or the moon, the light reflected off of or through it is changed, shifted, accelerated with the particular flavor of that object, which is why we like crystals, etc - what comes of of an object is all about how things bang around inside the micro-structure of the object, and for some reason we like things with a regular repeating lattice structure - anyway, just be careful, and keep a watchful eye out for those who don't like experimentation of any kind and wouls shut you down