I use pink tourmaline. It's not so expensive where i live. I recharge them either at night with the light of a strong moon or i bury them in earth.

Pink tourmaline needs to be recharged as the energy they draw from it empties the stones. My succubi like it to be recharged this way.

As for interactions, yes there is a difference in intensity that i experience with fully loaded stones. Last week i recharged two stones and that evening i felt a whole lot of energy coming down on me. It was so surprising because it felt like a person actually sitting down on my leg. The combination of binding with fully loaded stones, lavender candles and roses as an offering has made a difference for me.

So personally i keep on buying pink tourmaline, not only does it look nice. The stones have a connection to your love chakra too and it helps with love and happiness overall.